Akeega

— THERAPEUTIC CATEGORIES —
  • Prostate and other male cancers

Akeega Generic Name & Formulations

General Description

Niraparib, abiraterone acetate; 50mg/500mg, 100mg/500mg; tabs.

Pharmacological Class

Poly (ADP-ribose) polymerase (PARP) inhibitor + CYP17 inhibitor.

How Supplied

Tabs—60

Manufacturer

Generic Availability

NO

Mechanism of Action

Niraparib is an inhibitor of PARP enzymes, including PARP-1 and PARP-2, that play a role in DNA repair. In vitro studies have shown that niraparib-induced cytotoxicity may involve inhibition of PARP enzymatic activity and increased formation of PARP-DNA complexes resulting in DNA damage, apoptosis, and cell death.

Abiraterone acetate is converted in vivo to abiraterone, an androgen biosynthesis inhibitor, that inhibits 17 α-hydroxylase/C17,20-lyase (CYP17). This enzyme is expressed in testicular, adrenal, and prostatic tumor tissues and is required for androgen biosynthesis.

Akeega Indications

Indications

In combination with prednisone for the treatment of deleterious or suspected deleterious BRCA-mutated (BRCAm) metastatic castration-resistant prostate cancer (mCRPC).

Akeega Dosage and Administration

Adult

Confirm presence of a BRCA gene alteration. Take on an empty stomach. Swallow whole with water. 200mg/1000mg once daily (in combination with prednisone 10mg daily) until disease progression or unacceptable toxicity. Also give concurrent GnRH analog or patient should have had bilateral orchiectomy. Dose adjustments for adverse reactions: see full labeling.

Children

Not established.

Akeega Contraindications

Not Applicable

Akeega Boxed Warnings

Not Applicable

Akeega Warnings/Precautions

Warnings/Precautions

Discontinue if myelodysplastic syndrome/acute myeloid leukemia (MDS/AML) is confirmed. Monitor CBCs weekly for the first month, every 2 weeks for the next 2 months, monthly for the remaining first year, then every other month as clinically indicated. Do not start therapy until recovery from hematological toxicity due to previous chemotherapy; discontinue if toxicities unresolved within 28 days after interruption (see full labeling). Risk for mineralocorticoid excess; monitor BP, serum potassium, fluid retention at least weekly for the first 2 months, the once monthly. Control hypertension and correct hypokalemia before and during treatment. Underlying conditions (eg, heart failure, recent MI, cardiovascular disease, ventricular arrhythmia); monitor closely. Monitor for adrenocortical insufficiency. Stress (may need higher corticosteroid dose). Monitor LFTs prior to starting treatment, every 2 weeks for the first 3 months, and monthly thereafter. Permanently discontinue if concurrent ALT elevation >3×ULN and total bilirubin >2×ULN develops without biliary obstruction or other causes of elevation, or if ALT/AST ≥20×ULN at any time. Preexisting diabetes (esp. those taking thiazolidinediones-containing products). Monitor blood glucose; may need to adjust antidiabetic dose. Discontinue promptly if posterior reversible encephalopathy syndrome (PRES) is suspected. Moderate or severe hepatic impairment: not recommended. Severe renal impairment: monitor. Embryo-fetal toxicity. Advise males with female partners of reproductive potential to use effective contraception during and for 4 months after the last dose. Pregnancy (should handle tabs with protection [eg, gloves]), nursing mothers: not established in women.

Akeega Pharmacokinetics

Absorption

Niraparib:

  • The median Tmax: 3 hours (after dosing).
  • Absolute bioavailability: ~73%.

Abiraterone:

  • The median Tmax: 1.5 hours (after dosing).

Distribution

Niraparib: 

  • Apparent volume of distribution: 1117 L.
  • Plasma protein bound: 83%.

Abiraterone:

  • Apparent voulme of distribution: 25774 L.
  • Plasma protein bound: >99%. 

Metabolism

Niraparib:

  • Carboxylesterases.

Abiraterone:

  • CYP3A4, SULT2A1.

Elimination

Niraparib:

  • Renal (48%), fecal (39%).
  • Half-life: ~62 hours.

Abiraterone:

  • Renal (5%), fecal (88%).
  • Half-life: ~20 hours. 

Akeega Interactions

Interactions

Increased fractures and mortality when concomitant abiraterone plus prednisone/prednisolone with radium Ra 223 dichloride; not recommended. Antagonized by strong CYP3A4 inducers (eg, rifampin); avoid concomitant use. Potentiates CYP2D6 substrates (eg, dextromethorphan) or CYP2C8 substrates (eg, pioglitazone); monitor for toxicity. Avoid concomitant CYP2D6 substrates; if no alternatives, consider dose reduction of substrate. 

Akeega Adverse Reactions

Adverse Reactions

Musculoskeletal pain, fatigue, constipation, hypertension, nausea, edema, dyspnea, decreased appetite, vomiting, dizziness, COVID-19, headache, abdominal pain, hemorrhage, urinary tract infection, cough, insomnia, weight decreased, arrhythmia, fall, pyrexia, lab abnormalities (decreased hemoglobin, decreased lymphocytes, decreased WBCs, decreased platelets, increased alkaline phosphatase, decreased neutrophils, increased creatinine, increased or decreased potassium, increased AST/ALT, increased bilirubin); MDS/AML, PRES, hypoglycemia, cardiovascular effects, hepatotoxicity (may be severe).

Akeega Clinical Trials

See Literature

Akeega Note

Not Applicable

Akeega Patient Counseling

See Literature

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