Piqray

— THERAPEUTIC CATEGORIES —
  • Breast cancer

Piqray Generic Name & Formulations

General Description

Alpelisib 50mg, 150mg, 200mg; tabs.

Pharmacological Class

Phosphatidylinositol 3-kinase inhibitor.

How Supplied

Blister pack—1×28 (200mg tabs); 2×28 (200mg + 50mg tabs); 2×28 (150mg tabs)

Storage

Store at 20°C to 25°C (68°F to 77°F), excursions permitted between 15°C and 30°C (59°F and 86°F).

Generic Availability

NO

Mechanism of Action

In breast cancer cell lines, alpelisib inhibited the phosphorylation of PI3K downstream targets, including Akt and showed activity in cell lines harboring a PIK3CA mutation. In vivo, alpelisib inhibited the PI3K/Akt signaling pathway and reduced tumor growth in xenograft models, including models of breast cancer. PI3K inhibition by alpelisib treatment has been shown to induce an increase in estrogen receptor (ER) transcription in breast cancer cells. The combination of alpelisib and fulvestrant demonstrated increased antitumor activity compared to either treatment alone in xenograft models derived from ER-positive, PIK3CA mutated breast cancer cell lines.

Piqray Indications

Indications

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 Dosage and Administration

Adult

Confirm presence of ≥1 PIK3CA mutations in tumor tissue or plasma specimens. Swallow whole. Take with food. 300mg once daily (in combination with fulvestrant 500mg on Days 1, 15, and 29, then once monthly thereafter); continue until disease progression or unacceptable toxicity. Dose modifications for adverse reactions: see full labeling.

Children

Not established.

Piqray Contraindications

Not Applicable

Piqray Boxed Warnings

Not Applicable

Piqray Warnings/Precautions

Warnings/Precautions

Severe hyperglycemia. Test fasting plasma glucose (FPG), HbA1c, and optimize blood glucose prior to initiation. Consider premedication with metformin prior to initiation based on risk factors (eg, hyperglycemia, GI tolerability, clinical situation). After initiating, monitor FPG or blood glucose at least once weekly for the first 2 weeks, then at least once every 4 weeks, and as indicated. Monitor HbA1c every 3 months and as indicated. Monitor FPG more frequently during first few weeks of treatment in those with risk factors for hyperglycemia (eg, obesity, elevated FPG, HbA1c >ULN, or age ≥75). Interrupt, reduce dose, or discontinue therapy based on severity of the hyperglycemia. Diabetes. Permanently discontinue if severe hypersensitivity occurs. Prior history of severe cutaneous reactions (eg, SJS, EM, TEN, DRESS): do not reintroduce. Interrupt therapy if signs/symptoms of severe cutaneous reactions occur; permanently discontinue if confirmed. Interrupt and evaluate if new or worsening respiratory symptoms occur; permanently discontinue if pneumonitis is confirmed. Monitor for diarrhea or colitis; interrupt, reduce dose, or discontinue therapy based on severity. Severe renal impairment (CrCl <30mL/min). Embryo-fetal toxicity. Pregnancy: exclude status prior to initiation. Advise females of reproductive potential and males (w. female partners) to use effective contraception during and for 1 week after last dose. Nursing mothers: not recommended (during and for 1 week after last dose).

Piqray Pharmacokinetics

Absorption

Median time to reach peak plasma concentration: 2–4 hours.

Distribution

Apparent volume of distribution (at steady-state): 114 L. Plasma protein bound: 89%.

Metabolism

Hydrolysis.

Elimination

Fecal (81%), renal (14%). Half-life: 8–9 hours. Clearance: 9.2 L/hr.

Piqray Interactions

Interactions

Antagonized by strong CYP3A4 inducers; avoid and consider alternatives. May be potentiated by BCRP inhibitors; avoid and use alternatives; if unavoidable, monitor closely for toxicity. Risk for hyperglycemia with concomitant systemic corticosteroids.

Piqray Adverse Reactions

Adverse Reactions

Lab abnormalities (eg, glucose increased, creatinine increased, lymphocyte count decreased, GGT increased, ALT increased, hemoglobin decreased, lipase increased, calcium decreased, glucose decreased, aPTT prolonged), diarrhea, rash, nausea, fatigue, decreased appetite, stomatitis, vomiting, weight decreased, and alopecia; ketoacidosis, hypersensitivity reactions, angioedema, interstitial lung disease, dehydration, acute kidney injury.

Piqray Clinical Trials

See Literature

Piqray Note

Not Applicable

Piqray Patient Counseling

See Literature