ELTROMBOPAG

Eltrombopag tablets contain eltrombopag olamine, a small molecule thrombopoietin (TPO) receptor agonist for oral administration. Eltrombopag olamine is a biphenyl hydrazone. The chemical name for eltrombopag olamine is 3'-{(2Z)-2-[1-(3,4-dimethylphenyl)-3-methyl-5-oxo-1,5-dihydro-4H-pyrazol-4ylidene]hydrazino}-2'-hydroxy-3-biphenylcarboxylic acid, ethanolamine. It has the molecular formula C 25 H 22 N 4 O 4 .C 4 H 14 N 2 O 2 . The molecular weight is 564.27 g/mol for eltrombopag olamine and 442.5 g/mol for eltrombopag free acid. Eltrombopag olamine has the following structural formula: Eltrombopag olamine is very slightly soluble in methanol and dimethyl formamide. Eltrombopag tablets contain eltrombopag olamine in the amount equivalent to 12.5 mg, 25 mg, 50 mg, or 75 mg of eltrombopag free acid. The inactive ingredients of eltrombopag tablets are: Tablet Core: magnesium stearate, mannitol, microcrystalline cellulose, povidone and sodium starch glycolate. Coating: FD&C Blue #2/Indigo carmine aluminum lake (for 25 mg), FD & C Yellow # 6/Sunset Yellow FCF Aluminum lake (for 25 mg), hypromellose, iron oxide yellow (for 75 mg), polyethylene glycol, polysorbate 80 (for 12.5 mg and 75 mg) and titanium dioxide. eltrombopagstructure

Eltrombopag tablet is a thrombopoietin receptor agonist indicated: • for the treatment of thrombocytopenia in adult and pediatric patients 1 year and older with persistent or chronic immune thrombocytopenia (ITP) who have had an insufficient response to corticosteroids, immunoglobulins, or splenectomy. Eltrombopag tablets should be used only in patients with ITP whose degree of thrombocytopenia and clinical condition increase the risk for bleeding. (1.1) • for the treatment of thrombocytopenia in patients with chronic hepatitis C to allow the initiation and maintenance of interferon-based therapy. Eltrombopag tablets should be used only in patients with chronic hepatitis C whose degree of thrombocytopenia prevents the initiation of interferon-based therapy or limits the ability to maintain interferon-based therapy. (1.2) • for the treatment of patients with severe aplastic anemia who have had an insufficient response to immunosuppressive therapy. (1.3) Limitations of Use: • Eltrombopag tablets are not indicated for the treatment of patients with myelodysplastic syndrome (MDS). (1.4) • Safety and efficacy have not been established in combination with direct-acting antiviral agents used without interferon for treatment of chronic hepatitis C infection. (1.4) 1.1 Treatment of Thrombocytopenia in Patients With Persistent or Chronic Immune Thrombocytopenia Eltrombopag tablets are indicated for the treatment of thrombocytopenia in adult and pediatric patients 1 year and older with persistent or chronic immune thrombocytopenia (ITP) who have had an insufficient response to corticosteroids, immunoglobulins, or splenectomy. Eltrombopag tablets should be used only in patients with ITP whose degree of thrombocytopenia and clinical condition increase the risk for bleeding. 1.2 Treatment of Thrombocytopenia in Patients With Hepatitis C Infection Eltrombopag tablets are indicated for the treatment of thrombocytopenia in patients with chronic hepatitis C to allow the initiation and maintenance of interferon-based therapy. Eltrombopag tablets should be used only in patients with chronic hepatitis C whose degree of thrombocytopenia prevents the initiation of interferon-based therapy or limits the ability to maintain interferon-based therapy. 1.3 Treatment of Severe Aplastic Anemia • Eltrombopag tablets are indicated for the treatment of patients with severe aplastic anemia who have had an insufficient response to immunosuppressive therapy. 1.4 Limitations of Use • Eltrombopag tablets are not indicated for the treatment of patients with myelodysplastic syndromes (MDS) [see Warnings and Precautions (5.3)] . • Safety and efficacy have not been established in combination with direct-acting antiviral agents used without interferon for treatment of chronic hepatitis C infection. Additional pediatric use information is approved for Novartis Pharmaceuticals Corporation's PROMACTA ® (eltrombopag) tablets. However, due to Novartis Pharmaceuticals Corporation's marketing exclusivity rights, this drug product is not labeled with that information.

• Take eltrombopag tablets without a meal or with a meal low in calcium (≤ 50 mg). Take eltrombopag tablets at least 2 hours before or 4 hours after any medications or products containing polyvalent cations, such as antacids, calcium-rich foods, and mineral supplements. (2.4, 7.1 , 12.3) • Persistent or Chronic ITP: Initiate eltrombopag tablets at 50 mg orally once daily for most adult and pediatric patients 6 years and older, and at 25 mg orally once daily for pediatric patients aged 1 to 5 years. Dose reductions are needed for patients with hepatic impairment and some patients of East-/Southeast-Asian ancestry. Adjust to maintain platelet count greater than or equal to 50 x 10 9 /L. Do not exceed 75 mg per day. (2.1, 8.6 , 8.7) • Chronic Hepatitis C-associated Thrombocytopenia: Initiate eltrombopag tablets at 25 mg orally once daily for all patients. Adjust to achieve target platelet count required to initiate antiviral therapy. Do not exceed a daily dose of 100 mg. (2.2) • Refractory Severe Aplastic Anemia: Initiate eltrombopag tablets at 50 mg orally once daily. Reduce initial dose in patients with hepatic impairment or patients of East-/Southeast-Asian ancestry. Adjust to maintain platelet count greater than 50 x 10 9 /L. Do not exceed 150 mg per day. (2.3, 8.6, 8.7) 2.1 Persistent or Chronic Immune Thrombocytopenia Use the lowest dose of eltrombopag tablets to achieve and maintain a platelet count greater than or equal to 50 x 10 9 /L as necessary to reduce the risk for bleeding. Dose adjustments are based upon the platelet count response. Do not use eltrombopag tablets to normalize platelet counts [see Warnings and Precautions (5.4) ] . In clinical trials, platelet counts generally increased within 1 to 2 weeks after starting eltrombopag tablets and decreased within 1 to 2 weeks after discontinuing eltrombopag tablets [see Clinical Studies (14.1) ]. Initial Dose Regimen: Adult and Pediatric Patients 6 Years and Older with ITP: Initiate eltrombopag tablets at a dose of 50 mg orally once daily, except in patients who are of East-/Southeast-Asian ancestry or who have mild to severe hepatic impairment (Child-Pugh class A, B, C). For patients of East-/Southeast-Asian ancestry with ITP, initiate eltrombopag tablets at a reduced dose of 25 mg orally once daily [see Use in Specific Populations (8.7) , Clinical Pharmacology (12.3) ]. For patients with ITP and mild, moderate, or severe hepatic impairment (Child-Pugh class A, B, C), initiate eltrombopag tablets at a reduced dose of 25 mg orally once daily [see Use in Specific Populations (8.6) , Clinical Pharmacology (12.3) ]. For patients of East-/Southeast-Asian ancestry with ITP and hepatic impairment (Child-Pugh class A, B, C), consider initiating eltrombopag tablets at a reduced dose of 12.5 mg orally once daily [see Clinical Pharmacology (12.3) ]. Pediatric Patients with ITP Aged 1 to 5 Years: Initiate eltrombopag tablets at a dose of 25 mg orally once daily [see Use in Specific Populations (8.7 ), Clinical Pharmacology (12.3) ]. Monitoring and Dose Adjustment: After initiating eltrombopag tablets, adjust the dose to achieve and maintain a platelet count greater than or equal to 50 x 10 9/ L as necessary to reduce the risk for bleeding. Do not exceed a dose of 75 mg daily. Monitor clinical hematology and liver tests regularly throughout therapy with eltrombopag tablets and modify the dosage regimen of eltrombopag tablets based on platelet counts as outlined in Table 1. During therapy with eltrombopag tablets, assess complete blood counts (CBCs) with differentials, including platelet counts, weekly until a stable platelet count has been achieved. Obtain CBCs with differentials, including platelet counts, monthly thereafter. When switching between the oral suspension and tablet, assess platelet counts weekly for 2 weeks, and then follow standard monthly monitoring. Table 1. Dose Adjustments of Eltrombopag Tablets in Patients With Persistent or Chronic Immune Thrombocytopenia Platelet count result Dose adjustment or response < 50 x 10 9 /L following at least 2 weeks of eltrombopag tablets Increase daily dose by 25 mg to a maximum of 75 mg/day. For patients taking 12.5 mg once daily, increase the dose to 25 mg daily before increasing the dose amount by 25 mg. ≥ 200 x 10 9 /L to ≤ 400 x 10 9 /L at any time Decrease the daily dose by 25 mg. Wait 2 weeks to assess the effects of this and any subsequent dose adjustments. For patients taking 25 mg once daily, decrease the dose to 12.5 mg once daily. > 400 x 10 9 /L Stop eltrombopag tablets; increase the frequency of platelet monitoring to twice weekly. Once the platelet count is < 150 x 10 9 /L, reinitiate therapy at a daily dose reduced by 25 mg. For patients taking 25 mg once daily, reinitiate therapy at a daily dose of 12.5 mg. > 400 x 10 9 /L after 2 weeks of therapy at lowest dose of eltrombopag tablets Discontinue eltrombopag tablets. In patients with ITP and hepatic impairment (Child-Pugh class A, B, C), after initiating eltrombopag tablets or after any subsequent dosing increase, wait 3 weeks before increasing the dose. Modify the dosage regimen of concomitant ITP medications, as medically appropriate, to avoid excessive increases in platelet counts during therapy with eltrombopag tablets. Do not administer more than one dose of eltrombopag tablets within any 24-hour period. Discontinuation: Discontinue eltrombopag tablets if the platelet count does not increase to a level sufficient to avoid clinically important bleeding after 4 weeks of therapy with eltrombopag tablets at the maximum daily dose of 75 mg. Excessive platelet count responses, as outlined in Table 1, or important liver test abnormalities (e.g., transaminases and/or bilirubin) also necessitate discontinuation of eltrombopag tablets [see Warnings and Precautions (5.2 , 5.6) and Drug Interactions (7.5)] . Obtain CBCs with differentials, including platelet counts, weekly for at least 4 weeks following discontinuation of eltrombopag tablets. 2.2 Chronic Hepatitis C-Associated Thrombocytopenia Use the lowest dose of eltrombopag tablets to achieve and maintain a platelet count necessary to initiate and maintain antiviral therapy with pegylated interferon and ribavirin. Dose adjustments are based upon the platelet count response. Do not use eltrombopag tablets to normalize platelet counts [see Warnings and Precautions (5.4) ] . In clinical trials, platelet counts generally began to rise within the first week of treatment with eltrombopag tablets [see Clinical Studies (14.2) ]. Initial Dose Regimen: Initiate eltrombopag tablets at a dose of 25 mg orally once daily. Monitoring and Dose Adjustment: Adjust the dose of eltrombopag tablets in 25 mg increments every 2 weeks as necessary to achieve the target platelet count required to initiate antiviral therapy. Monitor platelet counts every week prior to starting antiviral therapy. During antiviral therapy, adjust the dose of eltrombopag tablets to avoid dose reductions of peginterferon. Monitor CBCs with differentials, including platelet counts, weekly during antiviral therapy until a stable platelet count is achieved. Monitor platelet counts monthly thereafter. Do not exceed a dose of 100 mg daily. Monitor clinical hematology and liver tests (e.g., transaminases and bilirubin) regularly throughout therapy with eltrombopag tablets [see Drug Interactions (7.5) ]. For specific dosage instructions for peginterferon or ribavirin, refer to their respective prescribing information. Table 2. Dose Adjustments of Eltrombopag Tablets in Adults With Thrombocytopenia Due to Chronic Hepatitis C Platelet count result Dose adjustment or response < 50 x 10 9 /L following at least 2 weeks of eltrombopag tablets Increase daily dose by 25 mg to a maximum of 100 mg/day. ≥ 200 x 10 9 /L to ≤ 400 x 10 9 /L at any time Decrease the daily dose by 25 mg. Wait 2 weeks to assess the effects of this and any subsequent dose adjustments. > 400 x 10 9 /L Stop eltrombopag tablets; increase the frequency of platelet monitoring to twice weekly. Once the platelet count is < 150 x 10 9 /L, reinitiate therapy at a daily dose reduced by 25 mg. For patients taking 25 mg once daily, reinitiate therapy at a daily dose of 12.5 mg. > 400 x 10 9 /L after 2 weeks of therapy at lowest dose of eltrombopag tablets Discontinue eltrombopag tablets. Discontinuation: The prescribing information for pegylated interferon and ribavirin include recommendations for antiviral treatment discontinuation for treatment futility. Refer to pegylated interferon and ribavirin prescribing information for discontinuation recommendations for antiviral treatment futility. Eltrombopag tablets should be discontinued when antiviral therapy is discontinued. Excessive platelet count responses, as outlined in Table 2, or important liver test abnormalities also necessitate discontinuation of eltrombopag tablets [see Warnings and Precautions (5.2)] . 2.3 Severe Aplastic Anemia Refractory Severe Aplastic Anemia Use the lowest dose of eltrombopag tablets to achieve and maintain a hematologic response. Dose adjustments are based upon the platelet count. Hematologic response requires dose titration, generally up to 150 mg, and may take up to 16 weeks after starting eltrombopag tablets [see Clinical Studies (14.3) ]. Initial Dose Regimen: Initiate eltrombopag tablets at a dose of 50 mg orally once daily. For patients with severe aplastic anemia of East-/Southeast-Asian ancestry or those with mild, moderate, or severe hepatic impairment (Child-Pugh class A, B, C), initiate eltrombopag tablets at a reduced dose of 25 mg orally once daily [see Use in Specific Populations (8.6, 8.7) , Clinical Pharmacology (12.3) ]. Monitoring and Dose Adjustment: Adjust the dose of eltrombopag tablets in 50 mg increments every 2 weeks as necessary to achieve the target platelet count greater than or equal to 50 x 10 9 /L as necessary. Do not exceed a dose of 150 mg daily. Monitor clinical hematology and liver tests regularly throughout therapy with eltrombopag tablets and modify the dosage regimen of eltrombopag tablets based on platelet counts as outlined in Table 7. Table 7. Dose Adjustments of Eltrombopag Tablets in Patients With Refractory Severe Aplastic Anemia Platelet count result Dose adjustment or response < 50 x 10 9 /L following at least 2 weeks of eltrombopag tablets Increase daily dose by 50 mg to a maximum of 150 mg/day. For patients taking 25 mg once daily, increase the dose to 50 mg daily before increasing the dose amount by 50 mg. ≥ 200 x 10 9 /L to ≤ 400 x 10 9 /L at any time Decrease the daily dose by 50 mg. Wait 2 weeks to assess the effects of this and any subsequent dose adjustments. > 400 x 10 9 /L Stop eltrombopag tablets for 1 week. Once the platelet count is < 150 x 10 9 /L, reinitiate therapy at a dose reduced by 50 mg. > 400 x 10 9 /L after 2 weeks of therapy at lowest dose of eltrombopag tablets Discontinue eltrombopag tablets. For patients who achieve tri-lineage response, including transfusion independence, lasting at least 8 weeks: the dose of eltrombopag tablets may be reduced by 50% [see Clinical Studies (14.3) ]. If counts remain stable after 8 weeks at the reduced dose, then discontinue eltrombopag tablets and monitor blood counts. If platelet counts drop to less than 30 x 10 9 /L, hemoglobin to less than 9 g/dL, or absolute neutrophil count (ANC) to less than 0.5 x 10 9 /L, eltrombopag tablets may be reinitiated at the previous effective dose. Discontinuation: If no hematologic response has occurred after 16 weeks of therapy with eltrombopag tablets, discontinue therapy. If new cytogenetic abnormalities are observed, consider discontinuation of eltrombopag tablets [see Adverse Reactions (6.1) ]. Excessive platelet count responses (as outlined in Table 7) or important liver test abnormalities also necessitate discontinuation of eltrombopag tablets [see Warnings and Precautions (5.2)] . 2.4 Administration Administration of Tablets: Take eltrombopag tablets without a meal or with a meal low in calcium (≤ 50 mg). Take eltrombopag tablets at least 2 hours before or 4 hours after other medications (e.g., antacids), calcium-rich foods (containing > 50 mg calcium e.g., dairy products, calcium-fortified juices, and certain fruits and vegetables), or supplements containing polyvalent cations, such as iron, calcium, aluminum, magnesium, selenium, and zinc [see Drug Interactions (7.1) , Clinical Pharmacology (12.3) ]. Do not split, chew, or crush tablets and mix with food or liquids. Additional pediatric use information is approved for Novartis Pharmaceuticals Corporation's PROMACTA ® (eltrombopag) tablets. However, due to Novartis Pharmaceuticals Corporation's marketing exclusivity rights, this drug product is not labeled with that information.

None. None. (4)

The following clinically significant adverse reactions associated with eltrombopag are described in other sections. • Hepatic Decompensation in Patients with Chronic Hepatitis C [see Warnings and Precautions (5.1) ] • Hepatotoxicity [see Warnings and Precautions (5.2) ] • Increased Risk of Death and Progression of Myelodysplastic Syndromes to Acute Myeloid Leukemia [see Warnings and Precautions (5.3) ] • Thrombotic/Thromboembolic Complications [see Warnings and Precautions (5.4) ] • Cataracts [see Warnings and Precautions (5.5) ] Across all indications, the most common adverse reactions (≥ 20% in any indication) were: anemia, nausea, pyrexia, alanine aminotransferase increased, cough, fatigue, headache, and diarrhea. (6.1) To report SUSPECTED ADVERSE REACTIONS, contact XLCare Pharmaceuticals, Inc. at 1-866-495-1995 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch. 6.1 Clinical Trials Experience Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared with rates in the clinical trials of another drug and may not reflect the rates observed in practice. Persistent or Chronic Immune Thrombocytopenia Adults: In clinical trials, hemorrhage was the most common serious adverse reaction and most hemorrhagic reactions followed discontinuation of eltrombopag. Other serious adverse reactions included thrombotic/thromboembolic complications [see Warnings and Precautions (5.4) ]. The data described below reflect exposure of eltrombopag to patients with persistent or chronic ITP aged 18 to 85 years, of whom 66% were female, in three placebo-controlled trials and one open-label extension trial [see Clinical Studies (14.1) ]. Eltrombopag was administered to 330 patients for at least 6 months and 218 patients for at least 1 year. Table 8 presents the most common adverse drug reactions (experienced by greater than or equal to 3% of patients receiving eltrombopag) from the three placebo-controlled trials, with a higher incidence in eltrombopag versus placebo. Table 8. Adverse Reactions (≥ 3%) From Three Placebo-controlled Trials in Adults With Persistent or Chronic Immune Thrombocytopenia Adverse reaction Eltrombopag 50 mg n = 241 (%) Placebo n = 128 (%) Nausea 9 3 Diarrhea 9 7 Upper respiratory tract infection 7 6 Vomiting 6 < 1 Urinary tract infection a 5 4 Increased ALT 5 3 Myalgia 5 2 Oropharyngeal pain 4 3 Increased AST 4 2 Pharyngitis 4 2 Back pain 3 2 Influenza 3 2 Paresthesia 3 2 Rash 3 2 Abbreviations: ALT, alanine aminotransferase; AST, aspartate aminotransferase. a Includes PTs of urinary tract infection, cystitis, urinary tract infection bacterial, and bacteriuria. In the three controlled clinical persistent or chronic ITP trials, alopecia, musculoskeletal pain, blood alkaline phosphatase increased, and dry mouth were the adverse reactions reported in 2% of patients treated with eltrombopag and in no patients who received placebo. Among 302 patients with persistent or chronic ITP who received eltrombopag in the single-arm extension trial, the adverse reactions occurred in a pattern similar to that seen in the placebo-controlled trials. Table 9 presents the most common treatment-related adverse reactions (experienced by greater than or equal to 3% of patients receiving eltrombopag) from the extension trial. Table 9. Treatment-related Adverse Reactions (≥3%) From Extension Trial in Adults With Persistent or Chronic Immune Thrombocytopenia Adverse reaction Eltrombopag 50 mg n = 302 (%) Headache 10 ALT increased 5 AST increased 5 Cataract 5 Fatigue 5 Blood bilirubin increased 4 Nausea 4 Hyperbilirubinemia 3 Diarrhea 3 Abbreviations: ALT, alanine aminotransferase; AST, aspartate aminotransferase. In the three controlled persistent or chronic ITP trials, serum liver test abnormalities (predominantly Grade 2 or less in severity) were reported in 11% and 7% of patients for eltrombopag and placebo, respectively. Four patients (1%) treated with eltrombopag and three patients in the placebo group (2%) discontinued treatment due to hepatobiliary laboratory abnormalities. Seventeen of the patients treated with eltrombopag in the controlled trials with hepatobiliary laboratory abnormalities were re-exposed to eltrombopag in the extension trial. Eight of these patients again experienced liver test abnormalities (less than or equal to Grade 3) resulting in discontinuation of eltrombopag in one patient. In the extension persistent or chronic ITP trial, six additional patients had eltrombopag discontinued due to liver test abnormalities (less than or equal to Grade 3). In the three controlled persistent or chronic ITP trials, cataracts developed or worsened in 7% of patients treated with eltrombopag and 7% of patients in the placebo group. All patients had documented, preexisting risk factors for cataractogenesis, including corticosteroid use. In the extension trial, cataracts developed or worsened in 11% of patients who underwent ocular examination prior to therapy with eltrombopag. Seventy-two percent of patients had preexisting risk factors, including corticosteroid use. The safety of eltrombopag was also assessed in all patients treated in 7 adult persistent or chronic ITP clinical trials (N = 763 eltrombopag -treated patients and 179 placebo-treated patients). Thromboembolic events were reported in 6% of eltrombopag-treated patients versus 0% of placebo-treated patients and thrombotic microangiopathy with acute renal failure was reported in < 1% of eltrombopag-treated patients versus 0% of placebo-treated patients. In a placebo-controlled trial of eltrombopag in patients with chronic liver disease and thrombocytopenia not related to ITP, six patients treated with eltrombopag and one patient in the placebo group developed portal vein thromboses [see Warnings and Precautions (5.4) ]. Pediatric Patients: The data described below reflect median exposure to eltrombopag of 91 days for 107 pediatric patients (aged 1 to 17 years) with persistent or chronic ITP, of whom 53% were female, across the randomized phase of two placebo-controlled trials. Table 10 presents the most common adverse drug reactions (experienced by greater than or equal to 3% of pediatric patients 1 year and older receiving eltrombopag) across the two placebo-controlled trials, with a higher incidence for eltrombopag versus placebo. Table 10. Adverse Reactions (≥ 3%) With a Higher Incidence for Eltrombopag Versus Placebo From Two Placebo-controlled Trials in Pediatric Patients 1 Year and Older With Persistent or Chronic Immune Thrombocytopenia Adverse reaction Eltrombopag n = 107 (%) Placebo n = 50 (%) Upper respiratory tract infection 17 6 Nasopharyngitis 12 4 Cough 9 0 Diarrhea 9 2 Pyrexia 9 8 Abdominal pain 8 4 Oropharyngeal pain 8 2 Toothache 6 0 ALT increased a 6 0 Rash 5 2 AST increased 4 0 Rhinorrhea 4 0 Abbreviations: ALT, alanine aminotransferase; AST, aspartate aminotransferase. a Includes adverse reactions or laboratory abnormalities > 3 x ULN. In the two controlled clinical persistent or chronic ITP trials, cataracts developed or worsened in 2 (1%) patients treated with eltrombopag. Both patients had received chronic oral corticosteroids, a risk factor for cataractogenesis. Chronic Hepatitis C-associated Thrombocytopenia: In the two placebo-controlled trials, 955 patients with chronic hepatitis C-associated thrombocytopenia received eltrombopag. Table 11 presents the most common adverse drug reactions (experienced by greater than or equal to 10% of patients receiving eltrombopag compared with placebo). Table 11. Adverse Reactions (≥ 10% and Greater Than Placebo) From Two Placebo-controlled Trials in Adults With Chronic Hepatitis C Adverse reaction Eltrombopag + Peginterferon/Ribavirin n = 955 (%) Placebo + Peginterferon/Ribavirin n = 484 (%) Anemia 40 35 Pyrexia 30 24 Fatigue 28 23 Headache 21 20 Nausea 19 14 Diarrhea 19 11 Decreased appetite 18 14 Influenza-like illness 18 16 Insomnia a 16 15 Asthenia 16 13 Cough 15 12 Pruritus 15 13 Chills 14 9 Myalgia 12 10 Alopecia 10 6 Peripheral edema 10 5 a Includes PTs of insomnia, initial insomnia, and poor quality sleep. Rash was reported in 9% and 7% of patients receiving eltrombopag and placebo, respectively. In the two controlled clinical trials in patients with chronic hepatitis C, hyperbilirubinemia was reported in 8% of patients receiving eltrombopag compared with 3% for placebo. Total bilirubin greater than or equal to 1.5 x ULN was reported in 76% and 50% of patients receiving eltrombopag and placebo, respectively. ALT or AST greater than or equal to 3 x ULN was reported in 34% and 38% of patients for eltrombopag and placebo, respectively. In the two controlled clinical trials in patients with chronic hepatitis C, cataracts developed or worsened in 8% of patients treated with eltrombopag and 5% of patients treated with placebo. The safety of eltrombopag was also assessed in all patients treated with eltrombopag in the two controlled trials, including patients who initially received eltrombopag in the pre-antiviral treatment phase of the trial and were later randomized to the placebo arm (N = 1520 eltrombopag-treated patients). Hepatic failure was reported in 0.8% of eltrombopag-treated patients and 0.4% of placebo-treated patients. Severe Aplastic Anemia: Refractory Severe Aplastic Anemia In the single-arm, open-label trial, 43 patients with refractory severe aplastic anemia received eltrombopag. Eleven patients (26%) were treated for greater than 6 months and 7 patients (16%) were treated for greater than 1 year. The most common adverse reactions (greater than or equal to 20%) were nausea, fatigue, cough, diarrhea, and headache. Table 13. Adverse Reactions (≥ 10%) From One Open-label Trial in Adults With Refractory Severe Aplastic Anemia Adverse reaction Eltrombopag n = 43 (%) Nausea 33 Fatigue 28 Cough 23 Diarrhea 21 Headache 21 Pain in extremity 19 Pyrexia 14 Dizziness 14 Oropharyngeal pain 14 Abdominal pain 12 Muscle spasms 12 Transaminases increased 12 Arthralgia 12 Rhinorrhea 12 Rash and hyperbilirubinemia were reported in 7% of patients; cataract was reported in 2% of patients. In this trial, concurrent ALT or AST greater than 3 x ULN with total bilirubin greater than 1.5 x ULN were reported in 5% of patients. Total bilirubin greater than 1.5 x ULN occurred in 14% of patients. In this trial, patients had bone marrow aspirates evaluated for cytogenetic abnormalities. Eight patients had a new cytogenetic abnormality reported on therapy, including 5 patients who had complex changes in chromosome 7. 6.2 Postmarketing Experience The following adverse reactions have been identified during post approval use of eltrombopag. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate the frequency or establish a causal relationship to drug exposure. Skin and Subcutaneous Tissue Disorders: Skin discoloration, including hyperpigmentation and skin yellowing. Additional pediatric use information is approved for Novartis Pharmaceuticals Corporation's PROMACTA ® (eltrombopag) tablets. However, due to Novartis Pharmaceuticals Corporation's marketing exclusivity rights, this drug product is not labeled with that information.

7.1 Polyvalent Cations (Chelation) Eltrombopag chelates polyvalent cations (such as iron, calcium, aluminum, magnesium, selenium, and zinc) in foods, mineral supplements, and antacids. Take eltrombopag at least 2 hours before or 4 hours after any medications or products containing polyvalent cations, such as antacids, dairy products, and mineral supplements to avoid significant reduction in absorption of eltrombopag due to chelation [see Dosage and Administration (2.4) , Clinical Pharmacology (12.3) ]. 7.2 Transporters Use caution when concomitantly administering eltrombopag and drugs that are substrates of OATP1B1 (e.g., atorvastatin, bosentan, ezetimibe, fluvastatin, glyburide, olmesartan, pitavastatin, pravastatin, rosuvastatin, repaglinide, rifampin, simvastatin acid, SN-38 [active metabolite of irinotecan], valsartan) or breast cancer resistance protein (BCRP) (e.g., imatinib, irinotecan, lapatinib, methotrexate, mitoxantrone, rosuvastatin, sulfasalazine, topotecan). Monitor patients closely for signs and symptoms of excessive exposure to the drugs that are substrates of OATP1B1 or BCRP and consider reduction of the dose of these drugs, if appropriate. In clinical trials with eltrombopag, a dose reduction of rosuvastatin by 50% was recommended. 7.3 Protease Inhibitors HIV Protease Inhibitors: No dose adjustment is recommended when eltrombopag is coadministered with lopinavir/ritonavir (LPV/RTV). Drug interactions with other HIV protease inhibitors have not been evaluated. Hepatitis C Virus Protease Inhibitors: No dose adjustments are recommended when eltrombopag is coadministered with boceprevir or telaprevir. Drug interactions with other hepatitis C virus (HCV) protease inhibitors have not been evaluated. 7.4 Peginterferon Alfa-2a/b Therapy No dose adjustments are recommended when eltrombopag is coadministered with peginterferon alfa-2a (PEGASYS ® ) or -2b (PEGINTRON ® ). 7.5 Interference with Clinical Laboratory Tests Eltrombopag is highly colored and can cause patient sample discoloration, which is reported to interfere with some clinical laboratory tests, including, but not limited to bilirubin and creatinine. Bilirubin Testing: Eltrombopag can cause both positive and negative interference with bilirubin assays. If the laboratory results for bilirubin are inconsistent with clinical observations, further evaluation of liver function should be performed to clarify the clinical status of the patient. Evaluating contemporaneous aminotransferase values (AST, ALT) may help determine the validity of normal total bilirubin levels in the presence of clinical jaundice. Creatinine Testing: Eltrombopag can cause positive interference with creatinine measurements, leading to falsely elevated creatinine levels. In the event of an unexpected serum creatinine test result, further evaluation of renal function should be performed. Blood urea should be evaluated if serum creatinine is unexpectedly high. Communicate to the lab conducting testing if the patient is taking eltrombopag. Re-testing using other methods may also help in determining the validity of the test results.