Talazoparib

Generic Name: talazoparib

Over-the-Counter (OTC)

Brand Names:

Talzenna

11 DESCRIPTION Talazoparib is an inhibitor of mammalian polyadenosine 5'-diphosphoribose (ADP-ribose) polymerase (PARP) enzymes. The chemical name of talazoparib tosylate is (8 S ,9 R )-5-Fluoro-8-(4-fluorophenyl)-9-(1-methyl-1 H -1,2,4-triazol-5-yl)-2,7,8,9-tetrahydro-3 H -pyrido[4,3,2- de ]phthalazin-3-one 4-methylbenzenesulfonate (1:1). The chemical formula of talazoparib tosylate is C 26 H 22 F 2 N 6 O 4 S, and the relative molecular mass is 552.56 Daltons.

Overview

Uses

1 INDICATIONS AND USAGE TALZENNA is a poly (ADP-ribose) polymerase (PARP) inhibitor indicated for: Breast Cancer • As a single agent, for the treatment of adult patients with deleterious or suspected deleterious germline BRCA -mutated (g BRCA m) HER2-negative locally advanced or metastatic breast cancer. Select patients for therapy based on an FDA-approved companion diagnostic for TALZENNA. ( 1.1 ) HRR Gene-mutated Metastatic Castration-Resistant Prostate Cancer (mCRPC) • In combination with enzalutamide for the treatment of adult patients with HRR gene-mutated metastatic castration-resistant prostate cancer (mCRPC).

Dosage

2 DOSAGE AND ADMINISTRATION • Take TALZENNA with or without food. ( 2.4 ) Breast Cancer • The recommended dosage of TALZENNA is 1 mg taken orally once daily until disease progression or unacceptable toxicity. ( 2.2 ) • For adverse reactions, consider dosing interruption or dose reduction. ( 2.5 ) HRR Gene-mutated Metastatic Castration-Resistant Prostate Cancer (mCRPC) • The recommended dosage of TALZENNA is 0.5 mg taken orally once daily with enzalutamide until disease progression or unacceptable toxicity. ( 2.3 ) • Patients should also receive a gonadotropic-releasing hormone (GnRH) analog concurrently or should have had bilateral orchiectomy.

Side Effects

6 ADVERSE REACTIONS The following clinically significant adverse reactions are described elsewhere in the labeling: • Myelodysplastic Syndrome/Acute Myeloid Leukemia [see Warnings and Precautions (5.1) ] • Myelosuppression [see Warnings and Precautions (5.2) ] Most common adverse reactions (≥20%) as a single agent, including laboratory abnormalities, are: • Hemoglobin decreased, neutrophils decreased, lymphocytes decreased, platelets decreased, fatigue, glucose increased, aspartate aminotransferase increased, alkaline phosphatase increased, alanine aminotransferase increased, calcium decreased, nausea, headache, vomiting, alopecia, diarrhea, and decreased appetite.

Interactions

7 DRUG INTERACTIONS • P-gp Inhibitors : Reduce the dose when coadministered with certain P-gp inhibitors. Monitor for increased adverse reactions. ( 2.7 , 7.1 ) • BCRP Inhibitors : Monitor for potential increased adverse reactions. ( 7.1 ) 7.1 Effect of Other Drugs on TALZENNA Effect of P-gp Inhibitors Breast Cancer Avoid coadministration of TALZENNA with the following P-gp inhibitors: itraconazole, amiodarone, carvedilol, clarithromycin, itraconazole, and verapamil. If coadministration of TALZENNA with these P-gp inhibitors cannot be avoided, reduce the dose of TALZENNA [see Dosage and Administration (2.7) ] . When the P-gp inhibitor is discontinued, increase the dose of TALZENNA [see Dosage and Administration (2.7) ] .

Warnings

5 WARNINGS AND PRECAUTIONS • Myelodysplastic Syndrome/Acute Myeloid Leukemia (MDS/AML) : MDS/AML occurred in patients exposed to TALZENNA, and some cases were fatal. Monitor patients for hematological toxicity and discontinue if MDS/AML is confirmed. ( 5.1 ) • Myelosuppression : TALZENNA may affect hematopoiesis and can cause anemia, neutropenia, and/or thrombocytopenia. ( 5.2 ) • Embryo-Fetal Toxicity : TALZENNA can cause fetal harm. Advise of the potential risk to the fetus and to use effective contraception. ( 5.3 , 8.1 , 8.3 ) 5.1 Myelodysplastic Syndrome/Acute Myeloid Leukemia Myelodysplastic Syndrome/Acute Myeloid Leukemia (MDS/AML), including cases with a fatal outcome, has been reported in patients who received TALZENNA. 4 CONTRAINDICATIONS None. None. ( 4 )

Pregnancy

8.1 Pregnancy Risk Summary Based on findings from animal studies and its mechanism of action [see Clinical Pharmacology (12.1) ] , TALZENNA can cause embryo-fetal harm when administered to a pregnant woman. There are no available data on TALZENNA use in pregnant women to inform a drug-associated risk.

Storage

Storage Store at 20°C to 25°C (68°F to 77°F); excursions permitted between 15°C to 30°C (59°F to 86°F). [See USP Controlled Room Temperature].

Frequently Asked Questions

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Medical Disclaimer

This drug information is for educational purposes only and should not replace professional medical advice. Drug information is sourced from the FDA National Drug Code Directory and Structured Product Labeling. Always consult with a healthcare provider before starting, stopping, or changing any medication.