PIQRAY

PIQRAY (alpelisib) is a kinase inhibitor. The chemical name of alpelisib is (2S)- N 1 -[4-Methyl-5-[2-(2,2,2-trifluoro-1,1-dimethylethyl)-4-pyridinyl]-2-thiazolyl]-1,2-pyrrolidinedicarboxamide. Alpelisib is a white to almost white powder. The molecular formula for alpelisib is C 19 H 22 F 3 N 5 O 2 S and the relative molecular mass is 441.47 g/mol. The chemical structure of alpelisib is shown below: PIQRAY film-coated tablets are supplied for oral administration with three strengths that contain 50 mg, 150 mg and 200 mg of alpelisib. The tablets also contain hypromellose, magnesium stearate, mannitol, microcrystalline cellulose, and sodium starch glycolate. The film-coating contains hypromellose, iron oxide black, iron oxide red, macrogol/polyethylene glycol (PEG) 4000, talc, and titanium dioxide. alpelisib structural formula

PIQRAY is indicated in combination with fulvestrant for the treatment of adults with hormone receptor (HR)-positive, human epidermal growth factor receptor 2 (HER2)-negative, PIK3CA-mutated, advanced or metastatic breast cancer as detected by an FDA-approved test following progression on or after an endocrine-based regimen. PIQRAY is a kinase inhibitor indicated in combination with fulvestrant for the treatment of adults with hormone receptor (HR)-positive, human epidermal growth factor receptor 2 (HER2)-negative, PIK3CA-mutated, advanced or metastatic breast cancer as detected by an FDA-approved test following progression on or after an endocrine-based regimen.

Recommended Dose: 300 mg (two 150 mg tablets) taken orally once daily with food. ( 2.2 ) For adverse reactions, consider dose interruption, dose reduction, or discontinuation. ( 2.3 ) 2.1 Patient Selection Select patients for the treatment of HR-positive, HER2-negative advanced or metastatic breast cancer with PIQRAY, based on the presence of one or more PIK3CA mutations in tumor tissue or plasma specimens [see Clinical Studies (14)] . If no mutation is detected in a plasma specimen, test tumor tissue. Information on FDA-approved tests for the detection of PIK3CA mutations in breast cancer is available at: http://www.fda.gov/CompanionDiagnostics. 2.2 Dosage and Administration The recommended dose of PIQRAY is 300 mg (two 150 mg film-coated tablets) taken orally, once daily, with food [see Clinical Pharmacology (12.3)] . Continue treatment until disease progression or unacceptable toxicity occurs [see Dosage and Administration (2.3)] . Patients should take their dose of PIQRAY at approximately the same time each day. Swallow PIQRAY tablets whole (tablets should not be chewed, crushed or split prior to swallowing). No tablet should be ingested if it is broken, cracked, or otherwise not intact. If a dose of PIQRAY is missed, it can be taken with food within 9 hours after the time it is usually taken. After more than 9 hours, skip the dose for that day. The next day, take PIQRAY at the usual time. If the patient vomits after taking the dose, advise the patient not to take an additional dose on that day, and to resume the dosing schedule the next day at the usual time. When given with PIQRAY, the recommended dose of fulvestrant is 500 mg administered on Days 1, 15, and 29, and once monthly thereafter. Refer to the Full Prescribing Information for fulvestrant. 2.3 Dose Modifications for Adverse Reactions The recommended dose modifications for adverse reactions are listed in Table 1. Table 1: PIQRAY Dose Reduction Guidelines for Adverse Reactions 1 1 Only one dose reduction is permitted for pancreatitis. 2 If further dose reduction below 200 mg once daily is required, discontinue PIQRAY. PIQRAY dose level Dose and schedule Number and strength of tablets Starting dose 300 mg once daily Two 150 mg tablets First-dose reduction 250 mg once daily One 200 mg tablet and one 50 mg tablet Second-dose reduction 200 mg once daily 2 One 200 mg tablet Tables 2, 3, 4, and 5 summarize recommendations for dose interruption, reduction, or discontinuation of PIQRAY in the management of specific adverse reactions. Cutaneous Adverse Reactions If a severe cutaneous adverse reaction (SCAR) is confirmed, permanently discontinue PIQRAY. Do not reintroduce PIQRAY in patients who have experienced previous SCAR during PIQRAY treatment [see Warnings and Precautions (5.2)] . Table 2: Dose Modification and Management for Rash and Severe Cutaneous Adverse Reactions (SCARs) 1 Grading according to Common Terminology Criteria for Adverse Events (CTCAE) Version 5.0. 2 For all grades of rash, consider consultation with a dermatologist. 3 Antihistamines administered prior to rash onset may decrease incidence and severity of rash based on the SOLAR-1 trial. [see Warnings and Precautions (5.1, 5.2)] Grade 1,2 Recommendation 3 Grade 1 (< 10% body surface area (BSA) with active skin toxicity) No PIQRAY dose adjustment required. Initiate topical corticosteroid treatment. Consider adding oral antihistamine to manage symptoms. If active rash is not improved within 28 days of appropriate treatment, add a low dose systemic corticosteroid. If the etiology is SCAR, permanently discontinue PIQRAY. Grade 2 (10%-30% BSA with active skin toxicity) No PIQRAY dose adjustment required. Initiate or intensify topical corticosteroid and oral antihistamine treatment. Consider low dose systemic corticosteroid treatment. If rash improves to Grade ≤ 1 within 10 days, systemic corticosteroid may be discontinued. If the etiology is SCAR, permanently discontinue PIQRAY. Grade 3 (e.g., severe rash not responsive to medical management) (> 30% BSA with active skin toxicity) Interrupt PIQRAY. Initiate or intensify topical/systemic corticosteroid and oral antihistamine treatment. If the etiology is SCAR, permanently discontinue PIQRAY. If the etiology is not a SCAR, interrupt dose until improvement to Grade ≤ 1, then resume PIQRAY at next lower dose level. Grade 4 (e.g., severe bullous, blistering or exfoliating skin conditions) (any % BSA associated with extensive superinfection, with IV antibiotics indicated; life-threatening consequences) Permanently discontinue PIQRAY. Hyperglycemia Before initiating treatment with PIQRAY, test fasting plasma glucose (FPG), HbA1c, and optimize blood glucose. Consider premedication with metformin prior to the initiation of PIQRAY in combination with fulvestrant based on patient risk factors for hyperglycemia, gastrointestinal tolerability, and clinical situation [see Warnings and Precautions (5.3) and Adverse Reactions (6.1)] . After initiating treatment with PIQRAY, monitor fasting glucose (FPG or fasting blood glucose) at least once every week for the first 2 weeks, then at least once every 4 weeks, and as clinically indicated. Monitor HbA1c every 3 months and as clinically indicated. In patients with risk factors for hyperglycemia, monitor fasting glucose more closely and as clinically indicated [see Warnings and Precautions (5.3)] . Table 3: Dose Modification and Management for Hyperglycemia Abbreviation: ULN, upper limit of normal. 1 FPG/Fasting Blood Glucose/Grade levels reflect hyperglycemia grading according to Common Terminology Criteria for Adverse Events (CTCAE) Version 4.03. 2 Initiate applicable anti-hyperglycemic medications, including metformin, SGLT2 inhibitors or insulin sensitizers (such as thiazolidinediones or dipeptidyl peptidase-4 inhibitors), and review respective prescribing information for dosing and dose titration recommendations, including local hyperglycemic treatment guidelines. Metformin was recommended in the SOLAR-1 trial with the following guidance: Initiate metformin 500 mg once daily. Based on tolerability, metformin dose may be increased to 500 mg twice daily, followed by 500 mg with breakfast, and 1,000 mg with dinner, followed by further increase to 1,000 mg twice daily if needed [see Warnings and Precautions (5.3)] . 3 As recommended in the SOLAR-1 trial, insulin may be used for 1-2 days until hyperglycemia resolves. However, this may not be necessary in the majority of PIQRAY-induced hyperglycemia, given the short half-life of PIQRAY and the expectation of glucose levels normalizing after interruption of PIQRAY. [see Warnings and Precautions (5.3)] Fasting plasma glucose (FPG)/Fasting blood glucose values 1 Recommendation Dose modifications and management should only be based on fasting glucose values (FPG or fasting blood glucose). Grade 1 Fasting glucose > ULN -160 mg/dL or > ULN -8.9 mmol/L No PIQRAY dose adjustment required. Initiate or intensify anti-hyperglycemic treatment 2 . Grade 2 Fasting glucose > 160-250 mg/dL or > 8.9-13.9 mmol/L No PIQRAY dose adjustment required. Initiate or intensify anti-hyperglycemic treatment 2 . If fasting glucose does not decrease to ≤ 160 mg/dL or 8.9 mmol/L within 21 days under appropriate anti-hyperglycemic treatment 2,3 , reduce PIQRAY dose by 1 dose level and follow fasting glucose value specific recommendations. Grade 3 > 250-500 mg/dL or > 13.9-27.8 mmol/L Interrupt PIQRAY. Initiate or intensify oral anti-hyperglycemic treatment 2 and consider additional anti-hyperglycemic medications 3 for 1-2 days until hyperglycemia improves, as clinically indicated. Administer intravenous hydration and consider appropriate treatment (e.g., intervention for electrolyte/ketoacidosis/hyperosmolar disturbances). If fasting glucose decreases to ≤ 160 mg/dL or 8.9 mmol/L within 3 to 5 days under appropriate anti-hyperglycemic treatment, resume PIQRAY at 1 lower dose level. If fasting glucose does not decrease to ≤ 160 mg/dL or 8.9 mmol/L within 3 to 5 days under appropriate anti-hyperglycemic treatment, consultation with a physician with expertise in the treatment of hyperglycemia is recommended. If fasting glucose does not decrease to ≤ 160 mg/dL or 8.9 mmol/L within 21 days following appropriate anti-hyperglycemic treatment 2,3 , permanently discontinue PIQRAY treatment. Grade 4 > 500 mg/dL or > 27.8 mmol/L Interrupt PIQRAY. Initiate or intensify appropriate anti-hyperglycemic treatment 2,3 (administer intravenous hydration and consider appropriate treatment (e.g., intervention for electrolyte/ketoacidosis/hyperosmolar disturbances)), re-check fasting glucose within 24 hours and as clinically indicated. If fasting glucose decreases to ≤ 500 mg/dL or 27.8 mmol/L, follow fasting glucose value-specific recommendations for Grade 3. If fasting glucose is confirmed at > 500 mg/dL or 27.8 mmol/L, permanently discontinue PIQRAY treatment. Diarrhea or Colitis Table 4: Dose Modification and Management for Diarrhea or Colitis 1 Grading according to CTCAE Version 5.0. 2 For Grade 2 and 3 colitis, consider additional treatment, such as enteric-acting and/or systemic steroids. [see Warnings and Precautions (5.5)] Grade 1 Recommendation Grade 1 No PIQRAY dose adjustment is required. Initiate appropriate medical therapy and monitor as clinically indicated. Grade 2 Interrupt PIQRAY dose until improvement to Grade ≤ 1, then resume PIQRAY at the same dose level. For recurrent Grade ≥ 2, interrupt PIQRAY dose until improvement to Grade ≤ 1, then resume PIQRAY at the next lower dose level. Initiate or intensify appropriate medical therapy and monitor as clinically indicated 2 . Grade 3 Interrupt PIQRAY dose until improvement to Grade ≤ 1, then resume PIQRAY at the next lower dose level. Initiate or intensify appropriate medical therapy and monitor as clinically indicated 2 . Grade 4 Permanently discontinue PIQRAY. Other Toxicities Table 5: Dose Modification and Management for Other Toxicities (Excluding Hyperglycemia, Rash and Severe Cutaneous Adverse Reactions, and Diarrhea or Colitis) 1 Grading according to CTCAE Version 5.0. 2 For Grade 2 and 3 pancreatitis, interrupt PIQRAY dose until improvement to Grade < 2 and resume at next lower-dose level. Only one dose reduction is permitted. If toxicity reoccurs, permanently discontinue PIQRAY treatment. 3 For Grade 2 total bilirubin elevation, interrupt PIQRAY dose until improvement to Grade ≤ 1 and resume at the same dose if resolved in ≤ 14 days or resume at the next lower dose level if improved in > 14 days. Grade 1 Recommendation Grade 1 or 2 No PIQRAY dose adjustment is required. Initiate appropriate medical therapy and monitor as clinically indicated 2,3 . Grade 3 Interrupt PIQRAY dose until improvement to Grade ≤ 1, then resume PIQRAY at the next lower dose level. Grade 4 Permanently discontinue PIQRAY. Refer to the Full Prescribing Information of fulvestrant for dose modification guidelines in the event of toxicity and for other relevant safety information.

PIQRAY is contraindicated in patients with severe hypersensitivity to it or any of its components [see Warnings and Precautions (5.1)] . Severe hypersensitivity to PIQRAY or to any of its components. ( 4 )

The following adverse reactions are discussed in greater detail in other sections of the labeling: Severe Hypersensitivity [see Warnings and Precautions (5.1)] Severe Cutaneous Adverse Reactions [see Warnings and Precautions (5.2)] Hyperglycemia [see Warnings and Precautions (5.3)] Pneumonitis [see Warnings and Precautions (5.4)] Diarrhea or Colitis [see Warnings and Precautions (5.5)] Most common adverse reactions, including laboratory abnormalities (all Grades, incidence ≥ 20%) were glucose increased, creatinine increased, diarrhea, rash, lymphocyte count decreased, gamma-glutamyl transferase (GGT) increased, nausea, alanine aminotransferase (ALT) increased, fatigue, hemoglobin decreased, lipase increased, decreased appetite, stomatitis, vomiting, weight decreased, calcium decreased, glucose decreased, activated partial thromboplastin time (aPTT) prolonged, and alopecia. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Novartis Pharmaceuticals Corporation at 1-888-669-6682 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch . 6.1 Clinical Trial 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 to rates in the clinical trials of another drug and may not reflect the rates observed in practice. The safety of PIQRAY was evaluated in a randomized, double-blind, placebo-controlled trial (SOLAR-1) in 571 patients with HR-positive, HER2-negative, advanced or metastatic breast cancer enrolled into two cohorts, with or without a PIK3CA mutation [see Clinical Studies (14)] . Patients received either PIQRAY 300 mg plus fulvestrant (n = 284) or placebo plus fulvestrant (n = 287). Fulvestrant 500 mg was administered intramuscularly on Cycle 1, Day 1 and 15, and then at Day 1 of each 28-day cycle during treatment phase. Two patients (0.7%) died while on treatment with PIQRAY plus fulvestrant due to causes other than the underlying malignancy. Causes of death included one cardio-respiratory arrest and one second primary malignancy. Neither was suspected to be related to study treatment. Serious adverse reactions occurred in 35% of patients receiving PIQRAY plus fulvestrant. Serious adverse reactions in > 2% of patients receiving PIQRAY plus fulvestrant included hyperglycemia (10%), rash (3.5%), diarrhea (2.8%), acute kidney injury (2.5%), abdominal pain (2.1%), and anemia (2.1%). Osteonecrosis of the jaw (ONJ) was reported in 4.2% of patients (12/284) in the PIQRAY plus fulvestrant arm compared to 1.4% of patients (4/287) in the placebo arm. All patients experiencing ONJ had prior or concomitant bisphosphonates or RANK-ligand inhibitor administration. Among patients receiving PIQRAY plus fulvestrant, 4.6% permanently discontinued both PIQRAY and fulvestrant and 21% permanently discontinued PIQRAY alone, due to adverse reactions. The most frequent adverse reactions leading to treatment discontinuation of PIQRAY in > 2% patients receiving PIQRAY plus fulvestrant were hyperglycemia (6%), rash (4.2%), diarrhea (2.8%), and fatigue (2.5%). Dose reductions due to adverse reactions occurred in 55% of patients receiving PIQRAY plus fulvestrant. The most frequent adverse reactions leading to dose reduction in > 2% patients receiving PIQRAY plus fulvestrant were hyperglycemia (29%), rash (9%), diarrhea (6%), stomatitis (3.5%), and mucosal inflammation (2.1%). The most common adverse reactions, including laboratory abnormalities (all grades, incidence ≥ 20%) were glucose increased, creatinine increased, diarrhea, rash, lymphocyte count decreased, gamma-glutamyl transferase (GGT) increased, nausea, alanine aminotransferase (ALT) increased, fatigue, hemoglobin decreased, lipase increased, decreased appetite, stomatitis, vomiting, weight decreased, calcium decreased, glucose decreased, activated partial thromboplastin time (aPTT) prolonged, and alopecia. Adverse reactions and laboratory abnormalities are listed in Table 6 and Table 7, respectively. Table 6: Adverse Reactions Occurring in ≥ 10% and ≥ 2% Higher than Placebo Arm in SOLAR-1 (All Grades) Grading according to CTCAE Version 4.03. 1 Stomatitis: including stomatitis, aphthous ulcer and mouth ulceration. 2 Abdominal pain: abdominal pain, abdominal pain upper, abdominal pain lower. 3 Fatigue: including fatigue, asthenia. 4 Mucosal dryness: including dry mouth, mucosal dryness, vulvovaginal dryness. 5 Urinary tract infection: including UTI and single case of urosepsis. 6 Dysgeusia: including dysgeusia, ageusia, hypogeusia. 7 Rash: including rash, rash maculo-papular, rash macular, rash generalized, rash papular, rash pruritic. 8 Dry skin: including dry skin, skin fissures, xerosis, xeroderma. * No Grade 4 adverse reactions were reported. PIQRAY plus fulvestrant N = 284 Placebo plus fulvestrant N = 287 Adverse reactions All Grades Grade 3-4 All Grades Grade 3-4 % % % % Gastrointestinal disorders Diarrhea 58 7 * 16 0.3 * Nausea 45 2.5 * 22 0.3 * Stomatitis 1 30 2.5 * 6 0 * Vomiting 27 0.7 * 10 0.3 * Abdominal pain 2 17 1.4 * 11 1 * Dyspepsia 11 0 * 6 0 * General disorders and administration site conditions Fatigue 3 42 5 * 29 1 * Mucosal inflammation 19 2.1 * 1 0 * Edema peripheral 15 0 * 5 0.3 * Pyrexia 14 0.7 4.9 0.3 * Mucosal dryness 4 12 0.4 * 4.2 0 * Infections and infestations Urinary tract infection 5 10 0.7 * 5 1 * Investigations Weight decreased 27 3.9 * 2.1 0 * Metabolism and nutrition disorders Decreased appetite 36 0.7 * 10 0.3 * Nervous system disorders Dysgeusia 6 18 0.4 * 3.5 0 * Headache 18 0.7 * 13 0 * Skin and subcutaneous tissue disorders Rash 7 52 20 * 7 0.3 * Alopecia 20 0 * 2.4 0 * Pruritus 18 0.7 * 6 0 * Dry skin 8 18 0.4 * 3.8 0 * Among the patients with Grade 2 or 3 rash, the median time to first onset of Grade 2 or 3 rash was 12 days. A subgroup of 86 patients received premedication, including antihistamines, prior to onset of rash. In these patients, rash was reported less frequently than in the overall population, for all grades rash (27% vs 54%), Grade 3 rash (12% vs 20%) and rash leading to permanent discontinuation of PIQRAY (3.5% vs 4.2%). Of the 153 patients who experienced rash, 141 had resolution of the rash. Table 7: Laboratory Abnormalities Occurring in ≥ 10% of Patients in SOLAR-1 1 Glucose increase is an expected laboratory abnormality of PI3K inhibition. * No Grade 4 laboratory abnormalities were reported. PIQRAY plus fulvestrant N = 284 Placebo plus fulvestrant N = 287 Laboratory abnormality All Grades Grade 3-4 All Grades Grade 3-4 % % % % Hematological parameters Lymphocyte count decreased 52 8 40 4.5 * Hemoglobin decreased 42 4.2 * 29 1 * Activated partial thromboplastin time (aPTT) prolonged 21 0.7 * 16 0.3 * Platelet count decreased 14 1.1 6 0 * Biochemical parameters Glucose increased 1 79 39 34 1 Creatinine increased 67 2.8 * 25 0.7 * Gamma glutamyl transferase (GGT) increased 52 11 44 10 Alanine aminotransferase (ALT) increased 44 3.5 34 2.4 * Lipase increased 42 7 25 6 Calcium (corrected) decreased 27 2.1 20 1.4 Glucose decreased 26 0.4 14 0 * Potassium decreased 14 6 2.8 0.7 * Albumin decreased 14 0 * 8 0 * Magnesium decreased 11 0.4 * 4.2 0 * Metformin Premedication for Hyperglycemia Adverse Reactions The safety of PIQRAY and endocrine therapy with metformin premedication was evaluated in METALLICA (NCT04300790), a single-arm, two-cohort study in 68 patients with HR-positive, HER2-negative advanced breast cancer harboring PIK3CA mutation(s). The majority of patients (93%) received fulvestrant as endocrine therapy during the study. Cohort A enrolled patients with normal glycemic status (FPG < 100 mg/dl [< 5.6 mmol/L] and HbA1c < 5.7%) and Cohort B enrolled patients with impaired glycemic status (FPG 100–140 mg/dL [5.6–7.8 mmol/L] or HbA1c 5.7%–6.4%). Metformin was administered beginning 7 days prior to treatment with PIQRAY. On Day 1 to Day 3, metformin 500 mg twice daily was administered orally and then increased up to 1,000 mg twice daily based on tolerability. Hyperglycemia adverse reactions occurred in 33% (16/48) and 70% (14/20 patients) in Cohort A and Cohort B, respectively. Grade 3-4 hyperglycemia occurred in 2.1% (1/48) of patients in Cohort A and 15% (3/20) of patients in Cohort B. The incidence of nausea, vomiting, and diarrhea adverse reactions, including Grade 3 diarrhea, increases with metformin premedication [see Warnings and Precautions (5.3)] . Serious adverse reactions occurred in 22% of patients in the METALLICA study and serious adverse reactions ≥ 2% included diarrhea (3%), rash (3%) and vomiting (3%). The most common Grade 3-4 adverse reactions (≥ 5%) were rash (16%), diarrhea (13%), and hyperglycemia (6%). Permanent discontinuation of PIQRAY due to adverse reactions in the METALLICA study occurred in 19% of patients, and dose modification or interruption of PIQRAY due to adverse reactions occurred in 56% of patients, of which 28% were dose reductions. The most common adverse reactions (≥ 30%) in the METALLICA study were diarrhea (68%), nausea (68%), fatigue (46%), hyperglycemia (44%), rash (38%), and vomiting (34%). 6.2 Postmarketing Experience The following adverse reactions have been identified during post approval use of PIQRAY. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure. Eye disorders: Uveitis Gastrointestinal disorders: Colitis Metabolism and nutrition disorders: Hyperglycemic hyperosmolar nonketotic syndrome (HHNKS). Skin and subcutaneous tissue disorders: Angioedema, Drug reaction with eosinophilia and systemic symptoms (DRESS).

CYP3A4 Inducers : Avoid coadministration of PIQRAY with a strong CYP3A4 inducer. Consider an alternative concomitant drug with no or minimal potential to induce CYP3A4. ( 7.1 ) Breast Cancer Resistance Protein (BCRP) Inhibitors : Avoid the use of BCRP inhibitors in patients treated with PIQRAY. If unable to use alternative drugs, closely monitor for increased adverse reactions. ( 7.1 ) 7.1 Effect of Other Drugs on PIQRAY CYP3A4 Inducer Coadministration of PIQRAY with a strong CYP3A4 inducer decreases alpelisib concentration [see Clinical Pharmacology (12.3)] , which may reduce alpelisib efficacy. Avoid concomitant use of strong CYP3A4 inducers and consider an alternative concomitant drug with no or minimal potential to induce CYP3A4. Breast Cancer Resistance Protein Inhibitors Coadministration of PIQRAY with a breast cancer resistance protein (BCRP) inhibitor may increase alpelisib concentration [see Clinical Pharmacology (12.3)] , which may increase the risk of toxicities. Avoid the use of BCRP inhibitors in patients treated with PIQRAY. If unable to use alternative drugs, when PIQRAY is used in combination with BCRP inhibitors, closely monitor for increased adverse reactions.