Olaparib

Brand Names: Lynparza

Drug Class: Poly(ADP-Ribose) Polymerase Inhibitor

Overview

11 DESCRIPTION Olaparib is a poly (ADP-ribose) polymerase (PARP) inhibitor. The chemical name is 4-[(3-{[4-(cyclopropylcarbonyl)piperazin-1-yl]carbonyl}-4-fluorophenyl)methyl]phthalazin-1(2H)-one. The empirical molecular formula for Lynparza is C 24 H 23 FN 4 O 3 and the relative molecular mass is 434.46.

Mechanism of Action

12 CLINICAL PHARMACOLOGY 12.1 Mechanism of Action Olaparib is an inhibitor of poly (ADP-ribose) polymerase (PARP) enzymes, including PARP1, PARP2, and PARP3. PARP enzymes are involved in normal cellular functions, such as DNA transcription and DNA repair. Olaparib has been shown to inhibit growth of select tumor cell lines in vitro and decrease tumor growth in mouse xenograft models of human cancer, both as monotherapy or following platinum-based chemotherapy. Increased cytotoxicity and anti-tumor activity following treatment with olaparib were noted in cell lines and mouse tumor models with deficiencies in BRCA1/2 , ATM , or other genes involved in the homologous recombination repair (HRR) of DNA damage and correlated with platinum response.

Indications

  • 1 INDICATIONS AND USAGE Lynparza is a poly (ADP-ribose) polymerase (PARP) inhibitor indicated: Ovarian cancer • for the maintenance treatment of adult patients with deleterious or suspected deleterious germline or somatic BRCA -mutated advanced epithelial ovarian, fallopian tube or primary peritoneal cancer who are in complete or partial response to first-line platinum-based chemotherapy. Select patients for therapy based on an FDA-approved companion diagnostic for Lynparza. ( 1.1 , 2.

Common Doses

  • 300 mg
  • 50 mL
  • 200 mg
  • 15 mg

Dosage

2 DOSAGE AND ADMINISTRATION • Recommended dosage is 300 mg taken orally twice daily with or without food. See Full Prescribing Information for the recommended duration. (2.2) • Patients receiving Lynparza for mCRPC should also receive a gonadotropin-releasing hormone (GnRH) analog concurrently or should have had bilateral orchiectomy. (2.2) • For moderate renal impairment (CLcr 31-50 mL/min), reduce Lynparza dosage to 200 mg orally twice daily. (2.5) 2.1 Patient Selection Information on FDA-approved tests for the detection of genetic mutations is available at http://www.fda.

Contraindications

  • 4 CONTRAINDICATIONS None. None. (4)

Side Effects

  • 6 ADVERSE REACTIONS The following adverse reactions are discussed elsewhere in the labeling: • Myelodysplastic Syndrome/Acute Myeloid Leukemia [see Warnings and Precautions (5.1) ] • Pneumonitis [see Warnings and Precautions (5.2) ] • Venous Thromboembolism [see Warnings and Precautions (5.3) ] • Hepatotoxicity, Including Drug-Induced Liver Injury [see Warnings and Precautions (5.4) ] Most common adverse reactions (≥10%): • as a single agent were nausea, fatigue (including asthenia), anemia, vomiting, diarrhea, decreased appetite, headache, dysgeusia, cough, neutropenia, dyspnea, dizziness,...

Interactions

  • 7 DRUG INTERACTIONS • Strong or moderate CYP3A inhibitors: Avoid concomitant use. If concomitant use cannot be avoided, reduce Lynparza dosage. ( 2.4 , 7.2 , 12.3 ) • Strong or moderate CYP3A inducers: Avoid concomitant use. ( 7.2 , 12.3 ) 7.1 Use with Anticancer Agents Clinical studies of Lynparza with other myelosuppressive anticancer agents, including DNA damaging agents, indicate a potentiation and prolongation of myelosuppressive toxicity. 7.