Package/label Display Panel – Blister – 400 Mg

Imatinib mesylate is a kinase inhibitor indicated for the treatment of: Newly diagnosed adult and pediatric patients with Philadelphia chromosome positive chronic myeloid leukemia (Ph+ CML) in chronic phase. (1.1) Patients with Philadelphia chromosome positive chronic myeloid leukemia (Ph+ CML) in blast crisis (BC), accelerated phase (AP), or in chronic phase (CP) after failure of interferon-alpha therapy. (1.2) Adult patients with relapsed or refractory Philadelphia chromosome positive acute lymphoblastic leukemia (Ph+ ALL). (1.3) Pediatric patients with newly diagnosed Philadelphia chromosome positive acute lymphoblastic leukemia (Ph+ ALL) in combination with chemotherapy. (1.4) Adult patients with myelodysplastic/myeloproliferative diseases (MDS/MPD) associated with platelet-derived growth factor receptor (PDGFR) gene re-arrangements. (1.5) Adult patients with aggressive systemic mastocytosis (ASM) without the D816V c-Kit mutation or with c-Kit mutational status unknown. (1.6) Adult patients with hypereosinophilic syndrome (HES) and/or chronic eosinophilic leukemia (CEL) who have the FIP1L1-PDGFRα fusion kinase (mutational analysis or fluorescence in situ hybridization [FISH] demonstration of CHIC2 allele deletion) and for patients with HES and/or CEL who are FIP1L1‑-PDGFRα fusion kinase negative or unknown. (1.7) Adult patients with unresectable, recurrent and/or metastatic dermatofibrosarcoma protuberans (DFSP). (1.8) Patients with Kit (CD117) positive unresectable and/or metastatic malignant gastrointestinal stromal tumors (GIST). (1.9) Adjuvant treatment of adult patients following resection of Kit (CD117) positive GIST. (1.10)

Adults with Ph+ CML CP (2.2) :               400 mg/day Adults with Ph+ CML AP or BC (2.2) :             600 mg/day Pediatrics with Ph+ CML CP (2.3) :            340 mg/m 2 /day Adults with Ph+ ALL (2.4) :                 600 mg/day Pediatrics with Ph+ ALL (2.5) :              340 mg/m 2 /day Adults with MDS/MPD (2.6) :                400 mg/day Adults with ASM (2.7) :                  100 mg/day or 400 mg/day Adults with HES/CEL (2.8) :               100 mg/day or 400 mg/day Adults with DFSP (2.9) :                800 mg/day Adults with metastatic and/or unresectable GIST (2.10) :  400 mg/day Adjuvant treatment of adults with GIST (2.11) :       400 mg/day Patients with mild to moderate hepatic impairment (2.12) : 400 mg/day Patients with severe hepatic impairment (2.12) :      300 mg/day All doses of imatinib mesylate tablets should be taken with a meal and a large glass of water. Doses of 400 mg or 600 mg should be administered once daily, whereas a dose of 800 mg should be administered as 400 mg twice a day. Imatinib mesylate tablets can be dissolved in water or apple juice for patients having difficulty swallowing. Daily dosing of 800 mg and above should be accomplished using the 400-mg tablet to reduce exposure to iron.

Each film-coated tablet contains 100 mg or 400 mg of imatinib free base. 100 mg Tablets Yellow, circular, biconvex, film - coated tablet debossed with “472” on one side and breakline on the other side. Unit dose packages of 30 (3 x 10) NDC 60687-192-21 400 mg Tablets Yellow, ovaloid shaped, biconvex, film - coated tablet debossed with “475” on one side and breakline on the other side. Unit dose packages of 30 (5 x 6) NDC 60687-203-25 Storage and Handling Store at 20° to 25°C (68° to 77°F); excursions permitted between 15° and 30°C (59° and 86°F) [See USP Controlled Room Temperature]. Protect from moisture. FOR YOUR PROTECTION: Do not use if blister is torn or broken. Do not crush imatinib mesylate tablets. Avoid direct contact of crushed tablets with the skin or mucous membranes. If such contact occurs, wash thoroughly as outlined in the references. Avoid exposure to crushed tablets.

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Imatinib is a small molecule kinase inhibitor. Imatinib mesylate film-coated tablets are supplied as 100 mg and 400 mg tablets for oral administration. Each 100 mg tablet contains 119.45 mg of imatinib mesylate equivalent to 100 mg of imatinib free base. Each 400 mg tablet contains 477.8 mg of imatinib mesylate equivalent to 400 mg of imatinib free base. Imatinib mesylate is designated chemically as 4-[(4-Methyl-‑1-piperazinyl)methyl]-N-[4-methyl-3-[[4-(3-pyridinyl)-2-pyrimidinyl] amino]-phenyl] benzamide methanesulfonate and its structural formula is: Imatinib mesylate is an off-white to creamish yellow crystalline powder. Its molecular formula is C 29 H 31 N 7 O • CH 4 SO 3 and its molecular weight is 589.7 g/mol. Imatinib mesylate is soluble in aqueous buffers less than or equal to pH 5.5 but is very slightly soluble to insoluble in neutral/alkaline aqueous buffers. In non-aqueous solvents, the drug substance is freely soluble to very slightly soluble in dimethyl sulfoxide, methanol, and ethanol, but is insoluble in n-octanol, acetone, and acetonitrile. Inactive Ingredients: silicified microcrystalline cellulose, mannitol, copovidone, crospovidone, magnesium stearate, hypromellose, iron oxide yellow, polyethylene glycol, titanium dioxide, FD & C yellow # 6 aluminum lake and iron oxide red.

CYP3A4 inducers may decrease imatinib mesylate C max and area under curve (AUC). (2.12 , 7.1 , 12.3) CYP3A4 inhibitors may increase imatinib mesylate C max and AUC. (7.2 , 12.3) Imatinib mesylate is an inhibitor of CYP3A4 and CYP2D6 which may increase the C max and AUC of other drugs. (7.3 , 7.4 , 12.3) Patients who require anticoagulation should receive low-molecular weight or standard heparin and not warfarin. (7.3)

Dosing and Administration Advise patients to take imatinib mesylate tablets exactly as prescribed, not to change their dose or to stop taking imatinib mesylate tablets unless they are told to do so by their doctor. If the patient missed a dose of imatinib mesylate tablets, the patient should take the next scheduled dose at its regular time. The patient should not take two doses at the same time. Advise patients to take imatinib mesylate tablets with a meal and a large glass of water [see Dosage and Administration (2.1) ]. Fluid Retention and Edema Inform patients of the possibility of developing edema and fluid retention. Advise patients to contact their health care provider if unexpected rapid weight gain occurs [see Warnings and Precautions (5.1) ]. Hepatotoxicity Inform patients of the possibility of developing liver function abnormalities and serious hepatic toxicity. Advise patients to immediately contact their health care provider if signs of liver failure occur, including jaundice, anorexia, bleeding, or bruising [see Warnings and Precautions (5.4) ]. Pregnancy and Breastfeeding Advise patients to inform their doctor if they are or think they may be pregnant. Advise women of reproductive potential to avoid becoming pregnant while taking imatinib mesylate tablets. Female patients of reproductive potential taking imatinib mesylate tablets should use highly effective contraception during treatment and for fourteen days after stopping treatment with imatinib mesylate tablets [see Use in Specific Populations (8.3) ]. Avoid breastfeeding during treatment and for 1 month after the last dose [see Use in Specific Populations (8.2) ]. Drug Interactions Imatinib mesylate tablets and certain other medicines, such as warfarin, erythromycin, and phenytoin, including over-the-counter medications, such as herbal products, can interact with each other. Advise patients to tell their doctor if they are taking or plan to take iron supplements. Avoid grapefruit juice and other foods known to inhibit CYP3A4 while taking imatinib mesylate tablets [see Drug Interactions (7) ]. Pediatric Advise patients that growth retardation has been reported in children and pre-adolescents receiving imatinib mesylate tablets. The long term effects of prolonged treatment with imatinib mesylate tablets on growth in children are unknown. Therefore, closely monitor growth in children under imatinib mesylate tablets treatment [see Warnings and Precautions (5.11) ]. Driving and Using Machines Advise patients that they may experience side effects, such as dizziness, blurred vision, or somnolence during treatment with imatinib mesylate tablets. Therefore, caution patients about driving a car or operating machinery [see Warnings and Precautions (5.13) ].

The safety and effectiveness of imatinib mesylate have been demonstrated in pediatric patients with newly diagnosed Ph+ chronic phase CML and Ph+ ALL [see Clinical Studies (14.2 , 14.4) ]. There are no data in children under 1 year of age.

In the CML clinical studies, approximately 20% of patients were older than 65 years. In the study of patients with newly diagnosed CML, 6% of patients were older than 65 years. The frequency of edema was higher in patients older than 65 years as compared to younger patients; no other difference in the safety profile was observed [see Warnings and Precautions (5.1) ]. The efficacy of imatinib mesylate was similar in older and younger patients. In the unresectable or metastatic GIST study, 16% of patients were older than 65 years. No obvious differences in the safety or efficacy profile were noted in patients older than 65 years as compared to younger patients, but the small number of patients does not allow a formal analysis. In the adjuvant GIST study, 221 patients (31%) were older than 65 years. No difference was observed in the safety profile in patients older than 65 years as compared to younger patients, with the exception of a higher frequency of edema. The efficacy of imatinib mesylate was similar in patients older than 65 years and younger patients.

In the 2-year rat carcinogenicity study administration of imatinib at 15, 30, and 60 mg/kg/day resulted in a statistically significant reduction in the longevity of males at 60 mg/kg/day and females at greater than or equal to 30 mg/kg/day. Target organs for neoplastic changes were the kidneys (renal tubule and renal pelvis), urinary bladder, urethra, preputial and clitoral gland, small intestine, parathyroid glands, adrenal glands and non-glandular stomach. Neoplastic lesions were not seen at: 30 mg/kg/day for the kidneys, urinary bladder, urethra, small intestine, parathyroid glands, adrenal glands and non-glandular stomach, and 15 mg/kg/day for the preputial and clitoral gland. The papilloma/carcinoma of the preputial/clitoral gland were noted at 30 and 60 mg/kg/day, representing approximately 0.5 to 4 or 0.3 to 2.4 times the human daily exposure (based on AUC) at 400 mg/day or 800 mg/day, respectively, and 0.4 to 3 times the daily exposure in children (based on AUC) at 340 mg/m 2 . The renal tubule adenoma/carcinoma, renal pelvis transitional cell neoplasms, the urinary bladder and urethra transitional cell papillomas, the small intestine adenocarcinomas, the parathyroid glands adenomas, the benign and malignant medullary tumors of the adrenal glands and the non-glandular stomach papillomas/carcinomas were noted at 60 mg/kg/day. The relevance of these findings in the rat carcinogenicity study for humans is not known. Positive genotoxic effects were obtained for imatinib in an in vitro mammalian cell assay (Chinese hamster ovary) for clastogenicity (chromosome aberrations) in the presence of metabolic activation. Two intermediates of the manufacturing process, which are also present in the final product, are positive for mutagenesis in the Ames assay. One of these intermediates was also positive in the mouse lymphoma assay. Imatinib was not genotoxic when tested in an in vitro bacterial cell assay (Ames test), an in vitro mammalian cell assay (mouse lymphoma) and an in vivo rat micronucleus assay. In a study of fertility, male rats were dosed for 70 days prior to mating and female rats were dosed 14 days prior to mating and through to gestational Day 6. Testicular and epididymal weights and percent motile sperm were decreased at 60 mg/kg, approximately three-fourths the maximum clinical dose of 800 mg/day based on BSA. This was not seen at doses less than or equal to 20 mg/kg (one-fourth the maximum human dose of 800 mg). The fertility of male and female rats was not affected. Fertility was not affected in the preclinical fertility and early embryonic development study although lower testes and epididymal weights as well as a reduced number of motile sperm were observed in the high dose males rats. In the preclinical pre- and postnatal study in rats, fertility in the first generation offspring was also not affected by imatinib mesylate.

The following serious adverse reactions are described elsewhere in the labeling: Fluid Retention and Edema [see Warnings and Precautions (5.1) ] Hematologic Toxicity [see Warnings and Precautions (5.2) ] Congestive Heart Failure and Left Ventricular Dysfunction [see Warnings and Precautions (5.3) ] Hepatotoxicity [see Warnings and Precautions (5.4) ] Hemorrhage [see Warnings and Precautions (5.5) ] Gastrointestinal Disorders [see Warnings and Precautions (5.6) ] Hypereosinophilic Cardiac Toxicity [see Warnings and Precautions (5.7) ] Dermatologic Toxicities [see Warnings and Precautions (5.8) ] Hypothyroidism [see Warnings and Precautions (5.9) ] Growth Retardation in Children and Adolescents [see Warnings and Precautions (5.11) ] Tumor Lysis Syndrome [see Warnings and Precautions (5.12) ] Impairments Related to Driving and Using Machinery [see Warnings and Precautions (5.13) ] Renal Toxicity [see Warnings and Precautions (5.14) ]

Experience with doses greater than 800 mg is limited. Isolated cases of imatinib mesylate overdose have been reported. In the event of overdosage, observe the patient and give appropriate supportive treatment. Adult Overdose 1,200 to 1,600 mg (duration varying between 1 to 10 days): Nausea, vomiting, diarrhea, rash erythema, edema, swelling, fatigue, muscle spasms, thrombocytopenia, pancytopenia, abdominal pain, headache, decreased appetite. 1,800 to 3,200 mg (as high as 3,200 mg daily for 6 days): Weakness, myalgia, increased CPK, increased bilirubin, GI pain. 6,400 mg (single dose): One case in the literature reported one patient who experienced nausea, vomiting, abdominal pain, pyrexia, facial swelling, neutrophil count decreased, increase transaminases. 8 to 10 g (single dose): Vomiting and GI pain have been reported. A patient with myeloid blast crisis experienced Grade 1 elevations of serum creatinine, Grade 2 ascites and elevated liver transaminase levels, and Grade 3 elevations of bilirubin after inadvertently taking 1,200 mg of imatinib mesylate daily for 6 days. Therapy was temporarily interrupted and complete reversal of all abnormalities occurred within 1 week. Treatment was resumed at a dose of 400 mg daily without recurrence of adverse reactions. Another patient developed severe muscle cramps after taking 1,600 mg of imatinib mesylate daily for 6 days. Complete resolution of muscle cramps occurred following interruption of therapy and treatment was subsequently resumed. Another patient that was prescribed 400 mg daily, took 800 mg of imatinib mesylate on Day 1 and 1,200 mg on Day 2. Therapy was interrupted, no adverse reactions occurred and the patient resumed therapy. Pediatric Overdose One 3 year old male exposed to a single dose of 400 mg experienced vomiting, diarrhea, and anorexia; and another 3 year old male exposed to a single dose of 980 mg experienced decreased white blood cell (WBC) count and diarrhea.

Toxicities from Long-Term Use It is important to consider potential toxicities suggested by animal studies, specifically, liver, kidney, and cardiac toxicity and immunosuppression . Severe liver toxicity was observed in dogs treated for 2 weeks, with elevated liver enzymes, hepatocellular necrosis, bile duct necrosis, and bile duct hyperplasia. Renal toxicity was observed in monkeys treated for 2 weeks, with focal mineralization and dilation of the renal tubules and tubular nephrosis. Increased blood urea nitrogen (BUN) and creatinine were observed in several of these animals. An increased rate of opportunistic infections was observed with chronic imatinib treatment in laboratory animal studies. In a 39 week monkey study, treatment with imatinib resulted in worsening of normally suppressed malarial infections in these animals. Lymphopenia was observed in animals (as in humans). Additional long-term toxicities were identified in a 2-year rat study. Histopathological examination of the treated rats that died on study revealed cardiomyopathy (both sexes), chronic progressive nephropathy (females) and preputial gland papilloma as principal causes of death or reasons for sacrifice. Non-neoplastic lesions seen in this 2-year study which were not identified in earlier preclinical studies were the cardiovascular system, pancreas, endocrine organs and teeth. The most important changes included cardiac hypertrophy and dilatation, leading to signs of cardiac insufficiency in some animals.

OSHA Hazardous Drugs. OSHA. [Accessed on 20-September- 2013, from http://www.osha.gov/SLTC/hazardousdrugs/index.html ]

Risk Summary Imatinib mesylate can cause fetal harm when administered to a pregnant woman based on human and animal data. There are no clinical studies regarding use of imatinib mesylate in pregnant women. There have been postmarket reports of spontaneous abortions and congenital anomalies from women who have been exposed to imatinib mesylate during pregnancy. Reproductive studies in rats have demonstrated that imatinib mesylate induced teratogenicity and increased incidence of congenital abnormalities following prenatal exposure to imatinib mesylate at doses equal to the highest recommended human dose of 800 mg/day based on BSA. Advise women to avoid pregnancy when taking imatinib mesylate. If this drug is used during pregnancy, or if the patient becomes pregnant while taking this drug, apprise the patient of the potential hazard to the fetus. The background risk of major birth defects and miscarriage for the indicated population is not known; however, in the U.S. general population, the estimated background risk of major birth defects of clinically recognized pregnancies is 2% to 4% and of miscarriage is 15% to 20%. Data Animal Data In embryo-fetal development studies in rats and rabbits, pregnant animals received oral doses of imatinib mesylate up to 100 mg/kg/day and 60 mg/kg/day, respectively, during the period of organogenesis. In rats, imatinib mesylate was teratogenic at 100 mg/kg/day (approximately equal to the maximum human dose of 800 mg/day based on BSA), the number of fetuses with encephalocoele and exencephaly was higher than historical control values and these findings were associated with missing or underdeveloped cranial bones. Lower mean fetal body weights were associated with retarded skeletal ossifications. In rabbits, at doses 1.5 times higher than the maximum human dose of 800 mg/day based on BSA, no effects on the reproductive parameters with respect to implantation sites, number of live fetuses, sex ratio or fetal weight were observed. The examinations of the fetuses did not reveal any drug related morphological changes. In a pre- and postnatal development study in rats, pregnant rats received oral doses of imatinib mesylate during gestation (organogenesis) and lactation up to 45 mg/kg/day. Five animals developed a red vaginal discharge in the 45 mg/kg/day group on Days 14 or 15 of gestation, the significance of which is unknown since all females produced viable litters and none had increased post-implantation loss. Other maternal effects noted only at the dose of 45 mg/kg/day (approximately one-half the maximum human dose of 800 mg/day based on BSA) included an increased number of stillborn pups and pups dying between postpartum Days 0 and 4. In the F1 offspring at this same dose level, mean body weights were reduced from birth until terminal sacrifice and the number of litters achieving criterion for preputial separation was slightly decreased. There were no other significant effects in developmental parameters or behavioral testing. F1 fertility was not affected but reproductive effects were noted at 45 mg/kg/day, including an increased number of resorptions and a decreased number of viable fetuses. The no-observed-effect level (NOEL) for both maternal animals and the F1 generation was 15 mg/kg/day.

Newly diagnosed adult and pediatric patients with Philadelphia chromosome positive chronic myeloid leukemia (Ph+ CML) in chronic phase.

100 mg film-coated tablets Yellow, circular, biconvex, film - coated tablet debossed with “472” on one side and breakline on the other side. 400 mg film-coated tablets Yellow, ovaloid shaped, biconvex, film - coated tablet debossed with “475” on one side and breakline on the other side.

Imatinib mesylate is a protein-tyrosine kinase inhibitor that inhibits the BCR-ABL tyrosine kinase, the constitutive abnormal tyrosine kinase created by the Philadelphia chromosome abnormality in CML. Imatinib inhibits proliferation and induces apoptosis in BCR-ABL positive cell lines as well as fresh leukemic cells from Philadelphia chromosome positive chronic myeloid leukemia. Imatinib inhibits colony formation in assays using ex vivo peripheral blood and bone marrow samples from CML patients. In vivo , imatinib inhibits tumor growth of BCR-ABL transfected murine myeloid cells as well as BCR-ABL positive leukemia lines derived from CML patients in blast crisis. Imatinib is also an inhibitor of the receptor tyrosine kinases for platelet-derived growth factor (PDGF) and stem cell factor (SCF), c-kit, and inhibits PDGF- and SCF-mediated cellular events. In vitro, imatinib inhibits proliferation and induces apoptosis in GIST cells, which express an activating c-Kit mutation.

The pharmacokinetics of imatinib mesylate have been evaluated in studies in healthy subjects and in population pharmacokinetic studies in over 900 patients. The pharmacokinetics of imatinib mesylate are similar in CML and GIST patients. Absorption and Distribution Imatinib is well absorbed after oral administration with C max achieved within 2 to 4 hours post-dose. Mean absolute bioavailability is 98%. Mean imatinib AUC increases proportionally with increasing doses ranging from 25 mg to 1,000 mg. There is no significant change in the pharmacokinetics of imatinib on repeated dosing, and accumulation is 1.5- to 2.5-fold at steady state when imatinib mesylate is dosed once daily. At clinically relevant concentrations of imatinib, binding to plasma proteins in in vitro experiments is approximately 95%, mostly to albumin and α1-acid glycoprotein. Elimination Metabolism CYP3A4 is the major enzyme responsible for metabolism of imatinib. Other cytochrome P450 enzymes, such as CYP1A2, CYP2D6, CYP2C9, and CYP2C19, play a minor role in its metabolism. The main circulating active metabolite in humans is the N-demethylated piperazine derivative, formed predominantly by CYP3A4. It shows in vitro potency similar to the parent imatinib. The plasma AUC for this metabolite is about 15% of the AUC for imatinib. The plasma protein binding of N-demethylated metabolite CGP74588 is similar to that of the parent compound. Human liver microsome studies demonstrated that imatinib mesylate is a potent competitive inhibitor of CYP2C9, CYP2D6, and CYP3A4/5 with Ki values of 27, 7.5, and 8 µM, respectively. Excretion Imatinib elimination is predominately in the feces, mostly as metabolites. Based on the recovery of compound(s) after an oral 14 C-labeled dose of imatinib, approximately 81% of the dose was eliminated within 7 days, in feces (68% of dose) and urine (13% of dose). Unchanged imatinib accounted for 25% of the dose (5% urine, 20% feces), the remainder being metabolites. Following oral administration in healthy volunteers, the elimination half-lives of imatinib and its major active metabolite, the N-demethyl derivative (CGP74588), are approximately 18 and 40 hours, respectively. Typically, clearance of imatinib in a 50-year-old patient weighing 50 kg is expected to be 8 L/h, while for a 50-year-old patient weighing 100 kg the clearance will increase to 14 L/h. The inter-patient variability of 40% in clearance does not warrant initial dose adjustment based on body weight and/or age but indicates the need for close monitoring for treatment-related toxicity. Specific Populations Hepatic Impairment The effect of hepatic impairment on the pharmacokinetics of both imatinib and its major metabolite, CGP74588, was assessed in 84 patients with cancer and varying degrees of hepatic impairment [see Use in Specific Populations (8.6) ] at imatinib doses ranging from 100 mg to 800 mg. Exposure to both imatinib and CGP74588 was comparable between each of the mildly and moderately hepatically-impaired groups and the normal group. Patients with severe hepatic impairment tend to have higher exposure to both imatinib and its metabolite than patients with normal hepatic function. At steady state, the mean C max /dose and AUC/dose for imatinib increased by about 63% and 45%, respectively, in patients with severe hepatic impairment compared to patients with normal hepatic function. The mean C max /dose and AUC/dose for CGP74588 increased by about 56% and 55%, respectively, in patients with severe hepatic impairment compared to patients with normal hepatic function. Dose reductions are necessary for patients with severe hepatic impairment [see Dosage and Administration (2.12) ]. Renal Impairment The effect of renal impairment on the pharmacokinetics of imatinib was assessed in 59 cancer patients with varying degrees of renal impairment [see Use in Specific Populations (8.7) ] at single and steady state imatinib doses ranging from 100 to 800 mg/day. The mean exposure to imatinib (dose normalized AUC) in patients with mild and moderate renal impairment increased 1.5- to 2-fold compared to patients with normal renal function. The AUCs did not increase for doses greater than 600 mg in patients with mild renal impairment. The AUCs did not increase for doses greater than 400 mg in patients with moderate renal impairment. Two patients with severe renal impairment were dosed with 100 mg/day and their exposures were similar to those seen in patients with normal renal function receiving 400 mg/day. Dose reductions are necessary for patients with moderate and severe renal impairment [see Dosage and Administration (2.12) ]. Pediatric Use As in adult patients, imatinib was rapidly absorbed after oral administration in pediatric patients, with a C max of 2 to 4 hours. Apparent oral clearance was similar to adult values (11.0 L/hr/m 2 in children vs. 10.0 L/hr/m 2 in adults), as was the half-life (14.8 hours in children vs. 17.1 hours in adults). Dosing in children at both 260 mg/m 2 and 340 mg/m 2 achieved an AUC similar to the 400 mg dose in adults. The comparison of AUC on Day 8 vs. Day 1 at 260 mg/m 2 and 340 mg/m 2 dose levels revealed a 1.5- and 2.2-fold drug accumulation, respectively, after repeated once daily dosing. Mean imatinib AUC did not increase proportionally with increasing dose. Based on pooled population pharmacokinetic analysis in pediatric patients with hematological disorders (CML, Ph+ ALL, or other hematological disorders treated with imatinib), clearance of imatinib increases with increasing BSA. After correcting for the BSA effect, other demographics, such as age, body weight, and body mass index did not have clinically significant effects on the exposure of imatinib. The analysis confirmed that exposure of imatinib in pediatric patients receiving 260 mg/m 2 once daily (not exceeding 400 mg once-daily) or 340 mg/m 2 once daily (not exceeding 600 mg once daily) were similar to those in adult patients who received imatinib 400 mg or 600 mg once daily. Drug Interactions Agents Inducing CYP3A Metabolism Pretreatment of healthy volunteers with multiple doses of rifampin followed by a single dose of imatinib mesylate, increased imatinib mesylate oral-dose clearance by 3.8-fold, which significantly (p less than 0.05) decreased mean C max and AUC. Similar findings were observed in patients receiving 400 to 1,200 mg/day imatinib mesylate concomitantly with enzyme-inducing anti-epileptic drugs (EIAED) (e.g., carbamazepine, oxcarbamazepine, phenytoin, fosphenytoin, phenobarbital, and primidone). The mean dose normalized AUC for imatinib in the patients receiving EIAED’s decreased by 73% compared to patients not receiving EIAED. Concomitant administration of imatinib mesylate and St. John’s Wort led to a 30% reduction in the AUC of imatinib. Consider alternative therapeutic agents with less enzyme induction potential in patients when rifampin or other CYP3A4 inducers are indicated. Imatinib mesylate doses up to 1,200 mg/day (600 mg twice daily) have been given to patients receiving concomitant strong CYP3A4 inducers [see Dosage and Administration (2.12) ]. Agents Inhibiting CYP3A Metabolism There was a significant increase in exposure to imatinib (mean C max and AUC increased by 26% and 40%, respectively) in healthy subjects when imatinib mesylate was coadministered with a single dose of ketoconazole (a CYP3A4 inhibitor). Caution is recommended when administering imatinib mesylate with strong CYP3A4 inhibitors (e.g., ketoconazole, itraconazole, clarithromycin, atazanavir, indinavir, nefazodone, nelfinavir, ritonavir, saquinavir, telithromycin, and voriconazole). Grapefruit juice may also increase plasma concentrations of imatinib and should be avoided. Interactions with Drugs Metabolized by CYP3A4 Imatinib mesylate increases the mean C max and AUC of simvastatin (CYP3A4 substrate) 2- and 3.5-fold, respectively, suggesting an inhibition of the CYP3A4 by imatinib mesylate. Particular caution is recommended when administering imatinib mesylate with CYP3A4 substrates that have a narrow therapeutic window (e.g., alfentanil, cyclosporine, diergotamine, ergotamine, fentanyl, pimozide, quinidine, sirolimus or tacrolimus). Imatinib mesylate will increase plasma concentration of other CYP3A4 metabolized drugs (e.g., triazolo-benzodiazepines, dihydropyridine calcium channel blockers, certain HMG-CoA reductase inhibitors, etc.). Because warfarin is metabolized by CYP2C9 and CYP3A4, patients who require anticoagulation should receive low-molecular weight or standard heparin instead of warfarin. Interactions with Drugs Metabolized by CYP2D6 Imatinib mesylate increased the mean C max and AUC of metoprolol by approximately 23% suggesting that imatinib mesylate has a weak inhibitory effect on CYP2D6-mediated metabolism. No dose adjustment is necessary, however, caution is recommended when administering imatinib mesylate with CYP2D6 substrates that have a narrow therapeutic window. Interactions with Acetaminophen In vitro , imatinib mesylate inhibits the acetaminophen O-glucuronidate pathway (Ki 58.5 μM). Coadministration of imatinib mesylate (400 mg/day for 8 days) with acetaminophen (1,000 mg single dose on Day 8) in patients with CML did not result in any changes in the pharmacokinetics of acetaminophen. Imatinib mesylate pharmacokinetics were not altered in the presence of single-dose acetaminophen. There is no pharmacokinetic or safety data on the concomitant use of imatinib mesylate at doses greater than 400 mg/day or the chronic use of concomitant acetaminophen and imatinib mesylate.

Edema and severe fluid retention have occurred. Weigh patients regularly and manage unexpected rapid weight gain by drug interruption and diuretics. (5.1 , 6.1) Cytopenias, particularly anemia, neutropenia, and thrombocytopenia, have occurred. Manage with dose reduction, dose interruption, or discontinuation of treatment. Perform complete blood counts weekly for the first month, biweekly for the second month, and periodically thereafter. (5.2) Severe congestive heart failure and left ventricular dysfunction have been reported, particularly in patients with comorbidities and risk factors. Monitor and treat patients with cardiac disease or risk factors for cardiac failure. (5.3) Severe hepatotoxicity, including fatalities may occur. Assess liver function before initiation of treatment and monthly thereafter or as clinically indicated. Monitor liver function when combined with chemotherapy known to be associated with liver dysfunction. (5.4) Grade 3/4 hemorrhage has been reported in clinical studies in patients with newly diagnosed CML and with GIST. GI tumor sites may be the source of GI bleeds in GIST. (5.5) Gastrointestinal (GI) perforations, some fatal, have been reported. (5.6) Cardiogenic shock/left ventricular dysfunction has been associated with the initiation of imatinib mesylate in patients with conditions associated with high eosinophil levels (e.g., HES, MDS/MPD, and ASM). (5.7) Bullous dermatologic reactions (e.g., erythema multiforme and Stevens-Johnson syndrome) have been reported with the use of imatinib mesylate. (5.8) Hypothyroidism has been reported in thyroidectomy patients undergoing levothyroxine replacement. Closely monitor TSH levels in such patients. (5.9) Fetal harm can occur when administered to a pregnant woman. Apprise women of the potential harm to the fetus, and to use effective contraception. (5.10 , 8.1) Growth retardation occurring in children and pre-adolescents receiving imatinib mesylate has been reported. Close monitoring of growth in children under imatinib mesylate treatment is recommended. (5.11 , 6.2) Tumor Lysis Syndrome. Close monitoring is recommended. (5.12) Reports of motor vehicle accidents have been received in patients receiving imatinib mesylate. Caution patients about driving a car or operating machinery. (5.13) Renal Toxicity. A decline in renal function may occur in patients receiving imatinib mesylate. Evaluate renal function at baseline and during therapy, with attention to risk factors for renal dysfunction. (5.14)

NDC 60687- 192 -21 Imatinib Mesylate Tablets 100 mg* 30 Tablets (3 x 10)                 Rx Only *Each tablet contains 119.45 mg of imatinib mesylate equivalent to 100 mg of imatinib free base. Usual Dosage: See package insert for full prescribing information. Store at 20° to 25°C (68° to 77°F); excursions permitted between 15° to 30°C (59° to 86°F) [see USP Controlled Room Temperature]. Protect from moisture. Keep this and all drugs out of reach of children. FOR YOUR PROTECTION: Do not use if blister is torn or broken. The drug product contained in this package is from NDC # 47335-472, Sun Pharmaceutical Industries, Inc. Distributed by: American Health Packaging Columbus, Ohio 43217 719221 0419221/0723

Risk Summary Imatinib and its active metabolite are excreted into human milk. Because of the potential for serious adverse reactions in breastfed infants from imatinib mesylate, advise a lactating woman not to breastfeed during treatment and for 1 month after the last dose. Human Data Based on data from 3 breastfeeding women taking imatinib mesylate, the milk:plasma ratio is about 0.5 for imatinib and about 0.9 for the active metabolite. Considering the combined concentration of imatinib and active metabolite, a breastfed infant could receive up to 10% of the maternal therapeutic dose based on body weight.

Human postmarketing reports and animal studies have shown imatinib mesylate to be harmful to the developing fetus [see Use in Specific Populations (8.1) ]. Pregnancy Testing Test pregnancy status in females with reproductive potential prior to the initiation of treatment with imatinib mesylate. Contraception Females Advise female patients of reproductive potential to use effective contraception (methods that result in less than 1 % pregnancy rates) when using imatinib mesylate during treatment and for fourteen days after stopping treatment with imatinib mesylate [see Use in Specific Populations (8.1) ]. Infertility The risk of infertility in females or males of reproductive potential has not been studied in humans. In a rat study, the fertility in males and females was not affected [see Nonclinical Toxicology (13) ].

The effect of renal impairment on the pharmacokinetics of imatinib was assessed in 59 patients with cancer and varying degrees of renal impairment at single and steady state imatinib doses ranging from 100 to 800 mg/day. The mean exposure to imatinib (dose normalized AUC) in patients with mild and moderate renal impairment increased 1.5- to 2- fold compared to patients with normal renal function. There are not sufficient data in patients with severe renal impairment [see Clinical Pharmacology (12.3) ]. Dose reductions are necessary for patients with moderate and severe renal impairment [see Dosage and Administration (2.12) ]. Table 17: Renal Function Classification Renal Dysfunction Renal Function Tests Mild CrCL = 40 to 59 mL/min Moderate CrCL = 20 to 39 mL/min Severe CrCL = less than 20 mL/min Abbreviation: CrCL, creatinine clearance.

The effect of hepatic impairment on the pharmacokinetics of both imatinib and its major metabolite, CGP74588, was assessed in 84 patients with cancer with varying degrees of hepatic impairment at imatinib doses ranging from 100 mg to 800 mg. Mild and moderate hepatic impairment do not influence exposure to imatinib and CGP74588. In patients with severe hepatic impairment, the imatinib C max and area under curve (AUC) increased by 63% and 45% and the CGP74588 C max and AUC increased by 56% and 55%, relative to patients with normal hepatic function [see Clinical Pharmacology (12.3) ]. Reduce the dose by 25% for patients with severe hepatic impairment [see Dosage and Administration (2.12) ]. Table 16: Liver Function Classification Liver Function Test Normal (n=14) Mild (n=30) Moderate (n=20) Severe (n=20) Total Bilirubin less than or equal to ULN greater than 1.0 to 1.5 times the ULN greater than 1.5 to 3 times the ULN greater than 3 to 10 times the ULN SGOT less than or equal to ULN greater than ULN (can be normal if Total Bilirubin is greater than ULN) Any Any Abbreviation: SGOT, serum glutamic-oxaloacetic transaminase is now referred to as aspartate aminotransferase (AST); ULN, upper limit of normal for the institution.

Imatinib mesylate is a kinase inhibitor indicated for the treatment of: Newly diagnosed adult and pediatric patients with Philadelphia chromosome positive chronic myeloid leukemia (Ph+ CML) in chronic phase. (1.1) Patients with Philadelphia chromosome positive chronic myeloid leukemia (Ph+ CML) in blast crisis (BC), accelerated phase (AP), or in chronic phase (CP) after failure of interferon-alpha therapy. (1.2) Adult patients with relapsed or refractory Philadelphia chromosome positive acute lymphoblastic leukemia (Ph+ ALL). (1.3) Pediatric patients with newly diagnosed Philadelphia chromosome positive acute lymphoblastic leukemia (Ph+ ALL) in combination with chemotherapy. (1.4) Adult patients with myelodysplastic/myeloproliferative diseases (MDS/MPD) associated with platelet-derived growth factor receptor (PDGFR) gene re-arrangements. (1.5) Adult patients with aggressive systemic mastocytosis (ASM) without the D816V c-Kit mutation or with c-Kit mutational status unknown. (1.6) Adult patients with hypereosinophilic syndrome (HES) and/or chronic eosinophilic leukemia (CEL) who have the FIP1L1-PDGFRα fusion kinase (mutational analysis or fluorescence in situ hybridization [FISH] demonstration of CHIC2 allele deletion) and for patients with HES and/or CEL who are FIP1L1‑-PDGFRα fusion kinase negative or unknown. (1.7) Adult patients with unresectable, recurrent and/or metastatic dermatofibrosarcoma protuberans (DFSP). (1.8) Patients with Kit (CD117) positive unresectable and/or metastatic malignant gastrointestinal stromal tumors (GIST). (1.9) Adjuvant treatment of adult patients following resection of Kit (CD117) positive GIST. (1.10)

Adults with Ph+ CML CP (2.2) :               400 mg/day Adults with Ph+ CML AP or BC (2.2) :             600 mg/day Pediatrics with Ph+ CML CP (2.3) :            340 mg/m 2 /day Adults with Ph+ ALL (2.4) :                 600 mg/day Pediatrics with Ph+ ALL (2.5) :              340 mg/m 2 /day Adults with MDS/MPD (2.6) :                400 mg/day Adults with ASM (2.7) :                  100 mg/day or 400 mg/day Adults with HES/CEL (2.8) :               100 mg/day or 400 mg/day Adults with DFSP (2.9) :                800 mg/day Adults with metastatic and/or unresectable GIST (2.10) :  400 mg/day Adjuvant treatment of adults with GIST (2.11) :       400 mg/day Patients with mild to moderate hepatic impairment (2.12) : 400 mg/day Patients with severe hepatic impairment (2.12) :      300 mg/day All doses of imatinib mesylate tablets should be taken with a meal and a large glass of water. Doses of 400 mg or 600 mg should be administered once daily, whereas a dose of 800 mg should be administered as 400 mg twice a day. Imatinib mesylate tablets can be dissolved in water or apple juice for patients having difficulty swallowing. Daily dosing of 800 mg and above should be accomplished using the 400-mg tablet to reduce exposure to iron.

Each film-coated tablet contains 100 mg or 400 mg of imatinib free base. 100 mg Tablets Yellow, circular, biconvex, film - coated tablet debossed with “472” on one side and breakline on the other side. Unit dose packages of 30 (3 x 10) NDC 60687-192-21 400 mg Tablets Yellow, ovaloid shaped, biconvex, film - coated tablet debossed with “475” on one side and breakline on the other side. Unit dose packages of 30 (5 x 6) NDC 60687-203-25 Storage and Handling Store at 20° to 25°C (68° to 77°F); excursions permitted between 15° and 30°C (59° and 86°F) [See USP Controlled Room Temperature]. Protect from moisture. FOR YOUR PROTECTION: Do not use if blister is torn or broken. Do not crush imatinib mesylate tablets. Avoid direct contact of crushed tablets with the skin or mucous membranes. If such contact occurs, wash thoroughly as outlined in the references. Avoid exposure to crushed tablets.

None.

CYP3A4 inducers may decrease imatinib mesylate C max and area under curve (AUC). (2.12 , 7.1 , 12.3) CYP3A4 inhibitors may increase imatinib mesylate C max and AUC. (7.2 , 12.3) Imatinib mesylate is an inhibitor of CYP3A4 and CYP2D6 which may increase the C max and AUC of other drugs. (7.3 , 7.4 , 12.3) Patients who require anticoagulation should receive low-molecular weight or standard heparin and not warfarin. (7.3)

Dosing and Administration Advise patients to take imatinib mesylate tablets exactly as prescribed, not to change their dose or to stop taking imatinib mesylate tablets unless they are told to do so by their doctor. If the patient missed a dose of imatinib mesylate tablets, the patient should take the next scheduled dose at its regular time. The patient should not take two doses at the same time. Advise patients to take imatinib mesylate tablets with a meal and a large glass of water [see Dosage and Administration (2.1) ]. Fluid Retention and Edema Inform patients of the possibility of developing edema and fluid retention. Advise patients to contact their health care provider if unexpected rapid weight gain occurs [see Warnings and Precautions (5.1) ]. Hepatotoxicity Inform patients of the possibility of developing liver function abnormalities and serious hepatic toxicity. Advise patients to immediately contact their health care provider if signs of liver failure occur, including jaundice, anorexia, bleeding, or bruising [see Warnings and Precautions (5.4) ]. Pregnancy and Breastfeeding Advise patients to inform their doctor if they are or think they may be pregnant. Advise women of reproductive potential to avoid becoming pregnant while taking imatinib mesylate tablets. Female patients of reproductive potential taking imatinib mesylate tablets should use highly effective contraception during treatment and for fourteen days after stopping treatment with imatinib mesylate tablets [see Use in Specific Populations (8.3) ]. Avoid breastfeeding during treatment and for 1 month after the last dose [see Use in Specific Populations (8.2) ]. Drug Interactions Imatinib mesylate tablets and certain other medicines, such as warfarin, erythromycin, and phenytoin, including over-the-counter medications, such as herbal products, can interact with each other. Advise patients to tell their doctor if they are taking or plan to take iron supplements. Avoid grapefruit juice and other foods known to inhibit CYP3A4 while taking imatinib mesylate tablets [see Drug Interactions (7) ]. Pediatric Advise patients that growth retardation has been reported in children and pre-adolescents receiving imatinib mesylate tablets. The long term effects of prolonged treatment with imatinib mesylate tablets on growth in children are unknown. Therefore, closely monitor growth in children under imatinib mesylate tablets treatment [see Warnings and Precautions (5.11) ]. Driving and Using Machines Advise patients that they may experience side effects, such as dizziness, blurred vision, or somnolence during treatment with imatinib mesylate tablets. Therefore, caution patients about driving a car or operating machinery [see Warnings and Precautions (5.13) ].

The safety and effectiveness of imatinib mesylate have been demonstrated in pediatric patients with newly diagnosed Ph+ chronic phase CML and Ph+ ALL [see Clinical Studies (14.2 , 14.4) ]. There are no data in children under 1 year of age.

In the CML clinical studies, approximately 20% of patients were older than 65 years. In the study of patients with newly diagnosed CML, 6% of patients were older than 65 years. The frequency of edema was higher in patients older than 65 years as compared to younger patients; no other difference in the safety profile was observed [see Warnings and Precautions (5.1) ]. The efficacy of imatinib mesylate was similar in older and younger patients. In the unresectable or metastatic GIST study, 16% of patients were older than 65 years. No obvious differences in the safety or efficacy profile were noted in patients older than 65 years as compared to younger patients, but the small number of patients does not allow a formal analysis. In the adjuvant GIST study, 221 patients (31%) were older than 65 years. No difference was observed in the safety profile in patients older than 65 years as compared to younger patients, with the exception of a higher frequency of edema. The efficacy of imatinib mesylate was similar in patients older than 65 years and younger patients.

In the 2-year rat carcinogenicity study administration of imatinib at 15, 30, and 60 mg/kg/day resulted in a statistically significant reduction in the longevity of males at 60 mg/kg/day and females at greater than or equal to 30 mg/kg/day. Target organs for neoplastic changes were the kidneys (renal tubule and renal pelvis), urinary bladder, urethra, preputial and clitoral gland, small intestine, parathyroid glands, adrenal glands and non-glandular stomach. Neoplastic lesions were not seen at: 30 mg/kg/day for the kidneys, urinary bladder, urethra, small intestine, parathyroid glands, adrenal glands and non-glandular stomach, and 15 mg/kg/day for the preputial and clitoral gland. The papilloma/carcinoma of the preputial/clitoral gland were noted at 30 and 60 mg/kg/day, representing approximately 0.5 to 4 or 0.3 to 2.4 times the human daily exposure (based on AUC) at 400 mg/day or 800 mg/day, respectively, and 0.4 to 3 times the daily exposure in children (based on AUC) at 340 mg/m 2 . The renal tubule adenoma/carcinoma, renal pelvis transitional cell neoplasms, the urinary bladder and urethra transitional cell papillomas, the small intestine adenocarcinomas, the parathyroid glands adenomas, the benign and malignant medullary tumors of the adrenal glands and the non-glandular stomach papillomas/carcinomas were noted at 60 mg/kg/day. The relevance of these findings in the rat carcinogenicity study for humans is not known. Positive genotoxic effects were obtained for imatinib in an in vitro mammalian cell assay (Chinese hamster ovary) for clastogenicity (chromosome aberrations) in the presence of metabolic activation. Two intermediates of the manufacturing process, which are also present in the final product, are positive for mutagenesis in the Ames assay. One of these intermediates was also positive in the mouse lymphoma assay. Imatinib was not genotoxic when tested in an in vitro bacterial cell assay (Ames test), an in vitro mammalian cell assay (mouse lymphoma) and an in vivo rat micronucleus assay. In a study of fertility, male rats were dosed for 70 days prior to mating and female rats were dosed 14 days prior to mating and through to gestational Day 6. Testicular and epididymal weights and percent motile sperm were decreased at 60 mg/kg, approximately three-fourths the maximum clinical dose of 800 mg/day based on BSA. This was not seen at doses less than or equal to 20 mg/kg (one-fourth the maximum human dose of 800 mg). The fertility of male and female rats was not affected. Fertility was not affected in the preclinical fertility and early embryonic development study although lower testes and epididymal weights as well as a reduced number of motile sperm were observed in the high dose males rats. In the preclinical pre- and postnatal study in rats, fertility in the first generation offspring was also not affected by imatinib mesylate.

The following serious adverse reactions are described elsewhere in the labeling: Fluid Retention and Edema [see Warnings and Precautions (5.1) ] Hematologic Toxicity [see Warnings and Precautions (5.2) ] Congestive Heart Failure and Left Ventricular Dysfunction [see Warnings and Precautions (5.3) ] Hepatotoxicity [see Warnings and Precautions (5.4) ] Hemorrhage [see Warnings and Precautions (5.5) ] Gastrointestinal Disorders [see Warnings and Precautions (5.6) ] Hypereosinophilic Cardiac Toxicity [see Warnings and Precautions (5.7) ] Dermatologic Toxicities [see Warnings and Precautions (5.8) ] Hypothyroidism [see Warnings and Precautions (5.9) ] Growth Retardation in Children and Adolescents [see Warnings and Precautions (5.11) ] Tumor Lysis Syndrome [see Warnings and Precautions (5.12) ] Impairments Related to Driving and Using Machinery [see Warnings and Precautions (5.13) ] Renal Toxicity [see Warnings and Precautions (5.14) ]

Experience with doses greater than 800 mg is limited. Isolated cases of imatinib mesylate overdose have been reported. In the event of overdosage, observe the patient and give appropriate supportive treatment. Adult Overdose 1,200 to 1,600 mg (duration varying between 1 to 10 days): Nausea, vomiting, diarrhea, rash erythema, edema, swelling, fatigue, muscle spasms, thrombocytopenia, pancytopenia, abdominal pain, headache, decreased appetite. 1,800 to 3,200 mg (as high as 3,200 mg daily for 6 days): Weakness, myalgia, increased CPK, increased bilirubin, GI pain. 6,400 mg (single dose): One case in the literature reported one patient who experienced nausea, vomiting, abdominal pain, pyrexia, facial swelling, neutrophil count decreased, increase transaminases. 8 to 10 g (single dose): Vomiting and GI pain have been reported. A patient with myeloid blast crisis experienced Grade 1 elevations of serum creatinine, Grade 2 ascites and elevated liver transaminase levels, and Grade 3 elevations of bilirubin after inadvertently taking 1,200 mg of imatinib mesylate daily for 6 days. Therapy was temporarily interrupted and complete reversal of all abnormalities occurred within 1 week. Treatment was resumed at a dose of 400 mg daily without recurrence of adverse reactions. Another patient developed severe muscle cramps after taking 1,600 mg of imatinib mesylate daily for 6 days. Complete resolution of muscle cramps occurred following interruption of therapy and treatment was subsequently resumed. Another patient that was prescribed 400 mg daily, took 800 mg of imatinib mesylate on Day 1 and 1,200 mg on Day 2. Therapy was interrupted, no adverse reactions occurred and the patient resumed therapy. Pediatric Overdose One 3 year old male exposed to a single dose of 400 mg experienced vomiting, diarrhea, and anorexia; and another 3 year old male exposed to a single dose of 980 mg experienced decreased white blood cell (WBC) count and diarrhea.

Imatinib is a small molecule kinase inhibitor. Imatinib mesylate film-coated tablets are supplied as 100 mg and 400 mg tablets for oral administration. Each 100 mg tablet contains 119.45 mg of imatinib mesylate equivalent to 100 mg of imatinib free base. Each 400 mg tablet contains 477.8 mg of imatinib mesylate equivalent to 400 mg of imatinib free base. Imatinib mesylate is designated chemically as 4-[(4-Methyl-‑1-piperazinyl)methyl]-N-[4-methyl-3-[[4-(3-pyridinyl)-2-pyrimidinyl] amino]-phenyl] benzamide methanesulfonate and its structural formula is: Imatinib mesylate is an off-white to creamish yellow crystalline powder. Its molecular formula is C 29 H 31 N 7 O • CH 4 SO 3 and its molecular weight is 589.7 g/mol. Imatinib mesylate is soluble in aqueous buffers less than or equal to pH 5.5 but is very slightly soluble to insoluble in neutral/alkaline aqueous buffers. In non-aqueous solvents, the drug substance is freely soluble to very slightly soluble in dimethyl sulfoxide, methanol, and ethanol, but is insoluble in n-octanol, acetone, and acetonitrile. Inactive Ingredients: silicified microcrystalline cellulose, mannitol, copovidone, crospovidone, magnesium stearate, hypromellose, iron oxide yellow, polyethylene glycol, titanium dioxide, FD & C yellow # 6 aluminum lake and iron oxide red.

Toxicities from Long-Term Use It is important to consider potential toxicities suggested by animal studies, specifically, liver, kidney, and cardiac toxicity and immunosuppression . Severe liver toxicity was observed in dogs treated for 2 weeks, with elevated liver enzymes, hepatocellular necrosis, bile duct necrosis, and bile duct hyperplasia. Renal toxicity was observed in monkeys treated for 2 weeks, with focal mineralization and dilation of the renal tubules and tubular nephrosis. Increased blood urea nitrogen (BUN) and creatinine were observed in several of these animals. An increased rate of opportunistic infections was observed with chronic imatinib treatment in laboratory animal studies. In a 39 week monkey study, treatment with imatinib resulted in worsening of normally suppressed malarial infections in these animals. Lymphopenia was observed in animals (as in humans). Additional long-term toxicities were identified in a 2-year rat study. Histopathological examination of the treated rats that died on study revealed cardiomyopathy (both sexes), chronic progressive nephropathy (females) and preputial gland papilloma as principal causes of death or reasons for sacrifice. Non-neoplastic lesions seen in this 2-year study which were not identified in earlier preclinical studies were the cardiovascular system, pancreas, endocrine organs and teeth. The most important changes included cardiac hypertrophy and dilatation, leading to signs of cardiac insufficiency in some animals.

OSHA Hazardous Drugs. OSHA. [Accessed on 20-September- 2013, from http://www.osha.gov/SLTC/hazardousdrugs/index.html ]

Risk Summary Imatinib mesylate can cause fetal harm when administered to a pregnant woman based on human and animal data. There are no clinical studies regarding use of imatinib mesylate in pregnant women. There have been postmarket reports of spontaneous abortions and congenital anomalies from women who have been exposed to imatinib mesylate during pregnancy. Reproductive studies in rats have demonstrated that imatinib mesylate induced teratogenicity and increased incidence of congenital abnormalities following prenatal exposure to imatinib mesylate at doses equal to the highest recommended human dose of 800 mg/day based on BSA. Advise women to avoid pregnancy when taking imatinib mesylate. If this drug is used during pregnancy, or if the patient becomes pregnant while taking this drug, apprise the patient of the potential hazard to the fetus. The background risk of major birth defects and miscarriage for the indicated population is not known; however, in the U.S. general population, the estimated background risk of major birth defects of clinically recognized pregnancies is 2% to 4% and of miscarriage is 15% to 20%. Data Animal Data In embryo-fetal development studies in rats and rabbits, pregnant animals received oral doses of imatinib mesylate up to 100 mg/kg/day and 60 mg/kg/day, respectively, during the period of organogenesis. In rats, imatinib mesylate was teratogenic at 100 mg/kg/day (approximately equal to the maximum human dose of 800 mg/day based on BSA), the number of fetuses with encephalocoele and exencephaly was higher than historical control values and these findings were associated with missing or underdeveloped cranial bones. Lower mean fetal body weights were associated with retarded skeletal ossifications. In rabbits, at doses 1.5 times higher than the maximum human dose of 800 mg/day based on BSA, no effects on the reproductive parameters with respect to implantation sites, number of live fetuses, sex ratio or fetal weight were observed. The examinations of the fetuses did not reveal any drug related morphological changes. In a pre- and postnatal development study in rats, pregnant rats received oral doses of imatinib mesylate during gestation (organogenesis) and lactation up to 45 mg/kg/day. Five animals developed a red vaginal discharge in the 45 mg/kg/day group on Days 14 or 15 of gestation, the significance of which is unknown since all females produced viable litters and none had increased post-implantation loss. Other maternal effects noted only at the dose of 45 mg/kg/day (approximately one-half the maximum human dose of 800 mg/day based on BSA) included an increased number of stillborn pups and pups dying between postpartum Days 0 and 4. In the F1 offspring at this same dose level, mean body weights were reduced from birth until terminal sacrifice and the number of litters achieving criterion for preputial separation was slightly decreased. There were no other significant effects in developmental parameters or behavioral testing. F1 fertility was not affected but reproductive effects were noted at 45 mg/kg/day, including an increased number of resorptions and a decreased number of viable fetuses. The no-observed-effect level (NOEL) for both maternal animals and the F1 generation was 15 mg/kg/day.

Newly diagnosed adult and pediatric patients with Philadelphia chromosome positive chronic myeloid leukemia (Ph+ CML) in chronic phase.

100 mg film-coated tablets Yellow, circular, biconvex, film - coated tablet debossed with “472” on one side and breakline on the other side. 400 mg film-coated tablets Yellow, ovaloid shaped, biconvex, film - coated tablet debossed with “475” on one side and breakline on the other side.

Imatinib mesylate is a protein-tyrosine kinase inhibitor that inhibits the BCR-ABL tyrosine kinase, the constitutive abnormal tyrosine kinase created by the Philadelphia chromosome abnormality in CML. Imatinib inhibits proliferation and induces apoptosis in BCR-ABL positive cell lines as well as fresh leukemic cells from Philadelphia chromosome positive chronic myeloid leukemia. Imatinib inhibits colony formation in assays using ex vivo peripheral blood and bone marrow samples from CML patients. In vivo , imatinib inhibits tumor growth of BCR-ABL transfected murine myeloid cells as well as BCR-ABL positive leukemia lines derived from CML patients in blast crisis. Imatinib is also an inhibitor of the receptor tyrosine kinases for platelet-derived growth factor (PDGF) and stem cell factor (SCF), c-kit, and inhibits PDGF- and SCF-mediated cellular events. In vitro, imatinib inhibits proliferation and induces apoptosis in GIST cells, which express an activating c-Kit mutation.

The pharmacokinetics of imatinib mesylate have been evaluated in studies in healthy subjects and in population pharmacokinetic studies in over 900 patients. The pharmacokinetics of imatinib mesylate are similar in CML and GIST patients. Absorption and Distribution Imatinib is well absorbed after oral administration with C max achieved within 2 to 4 hours post-dose. Mean absolute bioavailability is 98%. Mean imatinib AUC increases proportionally with increasing doses ranging from 25 mg to 1,000 mg. There is no significant change in the pharmacokinetics of imatinib on repeated dosing, and accumulation is 1.5- to 2.5-fold at steady state when imatinib mesylate is dosed once daily. At clinically relevant concentrations of imatinib, binding to plasma proteins in in vitro experiments is approximately 95%, mostly to albumin and α1-acid glycoprotein. Elimination Metabolism CYP3A4 is the major enzyme responsible for metabolism of imatinib. Other cytochrome P450 enzymes, such as CYP1A2, CYP2D6, CYP2C9, and CYP2C19, play a minor role in its metabolism. The main circulating active metabolite in humans is the N-demethylated piperazine derivative, formed predominantly by CYP3A4. It shows in vitro potency similar to the parent imatinib. The plasma AUC for this metabolite is about 15% of the AUC for imatinib. The plasma protein binding of N-demethylated metabolite CGP74588 is similar to that of the parent compound. Human liver microsome studies demonstrated that imatinib mesylate is a potent competitive inhibitor of CYP2C9, CYP2D6, and CYP3A4/5 with Ki values of 27, 7.5, and 8 µM, respectively. Excretion Imatinib elimination is predominately in the feces, mostly as metabolites. Based on the recovery of compound(s) after an oral 14 C-labeled dose of imatinib, approximately 81% of the dose was eliminated within 7 days, in feces (68% of dose) and urine (13% of dose). Unchanged imatinib accounted for 25% of the dose (5% urine, 20% feces), the remainder being metabolites. Following oral administration in healthy volunteers, the elimination half-lives of imatinib and its major active metabolite, the N-demethyl derivative (CGP74588), are approximately 18 and 40 hours, respectively. Typically, clearance of imatinib in a 50-year-old patient weighing 50 kg is expected to be 8 L/h, while for a 50-year-old patient weighing 100 kg the clearance will increase to 14 L/h. The inter-patient variability of 40% in clearance does not warrant initial dose adjustment based on body weight and/or age but indicates the need for close monitoring for treatment-related toxicity. Specific Populations Hepatic Impairment The effect of hepatic impairment on the pharmacokinetics of both imatinib and its major metabolite, CGP74588, was assessed in 84 patients with cancer and varying degrees of hepatic impairment [see Use in Specific Populations (8.6) ] at imatinib doses ranging from 100 mg to 800 mg. Exposure to both imatinib and CGP74588 was comparable between each of the mildly and moderately hepatically-impaired groups and the normal group. Patients with severe hepatic impairment tend to have higher exposure to both imatinib and its metabolite than patients with normal hepatic function. At steady state, the mean C max /dose and AUC/dose for imatinib increased by about 63% and 45%, respectively, in patients with severe hepatic impairment compared to patients with normal hepatic function. The mean C max /dose and AUC/dose for CGP74588 increased by about 56% and 55%, respectively, in patients with severe hepatic impairment compared to patients with normal hepatic function. Dose reductions are necessary for patients with severe hepatic impairment [see Dosage and Administration (2.12) ]. Renal Impairment The effect of renal impairment on the pharmacokinetics of imatinib was assessed in 59 cancer patients with varying degrees of renal impairment [see Use in Specific Populations (8.7) ] at single and steady state imatinib doses ranging from 100 to 800 mg/day. The mean exposure to imatinib (dose normalized AUC) in patients with mild and moderate renal impairment increased 1.5- to 2-fold compared to patients with normal renal function. The AUCs did not increase for doses greater than 600 mg in patients with mild renal impairment. The AUCs did not increase for doses greater than 400 mg in patients with moderate renal impairment. Two patients with severe renal impairment were dosed with 100 mg/day and their exposures were similar to those seen in patients with normal renal function receiving 400 mg/day. Dose reductions are necessary for patients with moderate and severe renal impairment [see Dosage and Administration (2.12) ]. Pediatric Use As in adult patients, imatinib was rapidly absorbed after oral administration in pediatric patients, with a C max of 2 to 4 hours. Apparent oral clearance was similar to adult values (11.0 L/hr/m 2 in children vs. 10.0 L/hr/m 2 in adults), as was the half-life (14.8 hours in children vs. 17.1 hours in adults). Dosing in children at both 260 mg/m 2 and 340 mg/m 2 achieved an AUC similar to the 400 mg dose in adults. The comparison of AUC on Day 8 vs. Day 1 at 260 mg/m 2 and 340 mg/m 2 dose levels revealed a 1.5- and 2.2-fold drug accumulation, respectively, after repeated once daily dosing. Mean imatinib AUC did not increase proportionally with increasing dose. Based on pooled population pharmacokinetic analysis in pediatric patients with hematological disorders (CML, Ph+ ALL, or other hematological disorders treated with imatinib), clearance of imatinib increases with increasing BSA. After correcting for the BSA effect, other demographics, such as age, body weight, and body mass index did not have clinically significant effects on the exposure of imatinib. The analysis confirmed that exposure of imatinib in pediatric patients receiving 260 mg/m 2 once daily (not exceeding 400 mg once-daily) or 340 mg/m 2 once daily (not exceeding 600 mg once daily) were similar to those in adult patients who received imatinib 400 mg or 600 mg once daily. Drug Interactions Agents Inducing CYP3A Metabolism Pretreatment of healthy volunteers with multiple doses of rifampin followed by a single dose of imatinib mesylate, increased imatinib mesylate oral-dose clearance by 3.8-fold, which significantly (p less than 0.05) decreased mean C max and AUC. Similar findings were observed in patients receiving 400 to 1,200 mg/day imatinib mesylate concomitantly with enzyme-inducing anti-epileptic drugs (EIAED) (e.g., carbamazepine, oxcarbamazepine, phenytoin, fosphenytoin, phenobarbital, and primidone). The mean dose normalized AUC for imatinib in the patients receiving EIAED’s decreased by 73% compared to patients not receiving EIAED. Concomitant administration of imatinib mesylate and St. John’s Wort led to a 30% reduction in the AUC of imatinib. Consider alternative therapeutic agents with less enzyme induction potential in patients when rifampin or other CYP3A4 inducers are indicated. Imatinib mesylate doses up to 1,200 mg/day (600 mg twice daily) have been given to patients receiving concomitant strong CYP3A4 inducers [see Dosage and Administration (2.12) ]. Agents Inhibiting CYP3A Metabolism There was a significant increase in exposure to imatinib (mean C max and AUC increased by 26% and 40%, respectively) in healthy subjects when imatinib mesylate was coadministered with a single dose of ketoconazole (a CYP3A4 inhibitor). Caution is recommended when administering imatinib mesylate with strong CYP3A4 inhibitors (e.g., ketoconazole, itraconazole, clarithromycin, atazanavir, indinavir, nefazodone, nelfinavir, ritonavir, saquinavir, telithromycin, and voriconazole). Grapefruit juice may also increase plasma concentrations of imatinib and should be avoided. Interactions with Drugs Metabolized by CYP3A4 Imatinib mesylate increases the mean C max and AUC of simvastatin (CYP3A4 substrate) 2- and 3.5-fold, respectively, suggesting an inhibition of the CYP3A4 by imatinib mesylate. Particular caution is recommended when administering imatinib mesylate with CYP3A4 substrates that have a narrow therapeutic window (e.g., alfentanil, cyclosporine, diergotamine, ergotamine, fentanyl, pimozide, quinidine, sirolimus or tacrolimus). Imatinib mesylate will increase plasma concentration of other CYP3A4 metabolized drugs (e.g., triazolo-benzodiazepines, dihydropyridine calcium channel blockers, certain HMG-CoA reductase inhibitors, etc.). Because warfarin is metabolized by CYP2C9 and CYP3A4, patients who require anticoagulation should receive low-molecular weight or standard heparin instead of warfarin. Interactions with Drugs Metabolized by CYP2D6 Imatinib mesylate increased the mean C max and AUC of metoprolol by approximately 23% suggesting that imatinib mesylate has a weak inhibitory effect on CYP2D6-mediated metabolism. No dose adjustment is necessary, however, caution is recommended when administering imatinib mesylate with CYP2D6 substrates that have a narrow therapeutic window. Interactions with Acetaminophen In vitro , imatinib mesylate inhibits the acetaminophen O-glucuronidate pathway (Ki 58.5 μM). Coadministration of imatinib mesylate (400 mg/day for 8 days) with acetaminophen (1,000 mg single dose on Day 8) in patients with CML did not result in any changes in the pharmacokinetics of acetaminophen. Imatinib mesylate pharmacokinetics were not altered in the presence of single-dose acetaminophen. There is no pharmacokinetic or safety data on the concomitant use of imatinib mesylate at doses greater than 400 mg/day or the chronic use of concomitant acetaminophen and imatinib mesylate.

Edema and severe fluid retention have occurred. Weigh patients regularly and manage unexpected rapid weight gain by drug interruption and diuretics. (5.1 , 6.1) Cytopenias, particularly anemia, neutropenia, and thrombocytopenia, have occurred. Manage with dose reduction, dose interruption, or discontinuation of treatment. Perform complete blood counts weekly for the first month, biweekly for the second month, and periodically thereafter. (5.2) Severe congestive heart failure and left ventricular dysfunction have been reported, particularly in patients with comorbidities and risk factors. Monitor and treat patients with cardiac disease or risk factors for cardiac failure. (5.3) Severe hepatotoxicity, including fatalities may occur. Assess liver function before initiation of treatment and monthly thereafter or as clinically indicated. Monitor liver function when combined with chemotherapy known to be associated with liver dysfunction. (5.4) Grade 3/4 hemorrhage has been reported in clinical studies in patients with newly diagnosed CML and with GIST. GI tumor sites may be the source of GI bleeds in GIST. (5.5) Gastrointestinal (GI) perforations, some fatal, have been reported. (5.6) Cardiogenic shock/left ventricular dysfunction has been associated with the initiation of imatinib mesylate in patients with conditions associated with high eosinophil levels (e.g., HES, MDS/MPD, and ASM). (5.7) Bullous dermatologic reactions (e.g., erythema multiforme and Stevens-Johnson syndrome) have been reported with the use of imatinib mesylate. (5.8) Hypothyroidism has been reported in thyroidectomy patients undergoing levothyroxine replacement. Closely monitor TSH levels in such patients. (5.9) Fetal harm can occur when administered to a pregnant woman. Apprise women of the potential harm to the fetus, and to use effective contraception. (5.10 , 8.1) Growth retardation occurring in children and pre-adolescents receiving imatinib mesylate has been reported. Close monitoring of growth in children under imatinib mesylate treatment is recommended. (5.11 , 6.2) Tumor Lysis Syndrome. Close monitoring is recommended. (5.12) Reports of motor vehicle accidents have been received in patients receiving imatinib mesylate. Caution patients about driving a car or operating machinery. (5.13) Renal Toxicity. A decline in renal function may occur in patients receiving imatinib mesylate. Evaluate renal function at baseline and during therapy, with attention to risk factors for renal dysfunction. (5.14)

NDC 60687- 192 -21 Imatinib Mesylate Tablets 100 mg* 30 Tablets (3 x 10)                 Rx Only *Each tablet contains 119.45 mg of imatinib mesylate equivalent to 100 mg of imatinib free base. Usual Dosage: See package insert for full prescribing information. Store at 20° to 25°C (68° to 77°F); excursions permitted between 15° to 30°C (59° to 86°F) [see USP Controlled Room Temperature]. Protect from moisture. Keep this and all drugs out of reach of children. FOR YOUR PROTECTION: Do not use if blister is torn or broken. The drug product contained in this package is from NDC # 47335-472, Sun Pharmaceutical Industries, Inc. Distributed by: American Health Packaging Columbus, Ohio 43217 719221 0419221/0723

Risk Summary Imatinib and its active metabolite are excreted into human milk. Because of the potential for serious adverse reactions in breastfed infants from imatinib mesylate, advise a lactating woman not to breastfeed during treatment and for 1 month after the last dose. Human Data Based on data from 3 breastfeeding women taking imatinib mesylate, the milk:plasma ratio is about 0.5 for imatinib and about 0.9 for the active metabolite. Considering the combined concentration of imatinib and active metabolite, a breastfed infant could receive up to 10% of the maternal therapeutic dose based on body weight.

Human postmarketing reports and animal studies have shown imatinib mesylate to be harmful to the developing fetus [see Use in Specific Populations (8.1) ]. Pregnancy Testing Test pregnancy status in females with reproductive potential prior to the initiation of treatment with imatinib mesylate. Contraception Females Advise female patients of reproductive potential to use effective contraception (methods that result in less than 1 % pregnancy rates) when using imatinib mesylate during treatment and for fourteen days after stopping treatment with imatinib mesylate [see Use in Specific Populations (8.1) ]. Infertility The risk of infertility in females or males of reproductive potential has not been studied in humans. In a rat study, the fertility in males and females was not affected [see Nonclinical Toxicology (13) ].

The effect of renal impairment on the pharmacokinetics of imatinib was assessed in 59 patients with cancer and varying degrees of renal impairment at single and steady state imatinib doses ranging from 100 to 800 mg/day. The mean exposure to imatinib (dose normalized AUC) in patients with mild and moderate renal impairment increased 1.5- to 2- fold compared to patients with normal renal function. There are not sufficient data in patients with severe renal impairment [see Clinical Pharmacology (12.3) ]. Dose reductions are necessary for patients with moderate and severe renal impairment [see Dosage and Administration (2.12) ]. Table 17: Renal Function Classification Renal Dysfunction Renal Function Tests Mild CrCL = 40 to 59 mL/min Moderate CrCL = 20 to 39 mL/min Severe CrCL = less than 20 mL/min Abbreviation: CrCL, creatinine clearance.

The effect of hepatic impairment on the pharmacokinetics of both imatinib and its major metabolite, CGP74588, was assessed in 84 patients with cancer with varying degrees of hepatic impairment at imatinib doses ranging from 100 mg to 800 mg. Mild and moderate hepatic impairment do not influence exposure to imatinib and CGP74588. In patients with severe hepatic impairment, the imatinib C max and area under curve (AUC) increased by 63% and 45% and the CGP74588 C max and AUC increased by 56% and 55%, relative to patients with normal hepatic function [see Clinical Pharmacology (12.3) ]. Reduce the dose by 25% for patients with severe hepatic impairment [see Dosage and Administration (2.12) ]. Table 16: Liver Function Classification Liver Function Test Normal (n=14) Mild (n=30) Moderate (n=20) Severe (n=20) Total Bilirubin less than or equal to ULN greater than 1.0 to 1.5 times the ULN greater than 1.5 to 3 times the ULN greater than 3 to 10 times the ULN SGOT less than or equal to ULN greater than ULN (can be normal if Total Bilirubin is greater than ULN) Any Any Abbreviation: SGOT, serum glutamic-oxaloacetic transaminase is now referred to as aspartate aminotransferase (AST); ULN, upper limit of normal for the institution.