Glasdegib

Brand Names: Daurismo

Drug Class: Hedgehog Pathway Inhibitor

Overview

11 DESCRIPTION DAURISMO (glasdegib) is a hedgehog pathway inhibitor. It is formulated with the maleate salt of glasdegib. The molecular formula for glasdegib maleate is C 25 H 26 N 6 O 5 . The molecular weight for glasdegib maleate is 490.51 Daltons. The chemical name of glasdegib maleate is 1-((2R,4R)-2-(1H-benzo[d]imidazol-2-yl)-1-methylpiperidin-4-yl)-3-(4-cyanophenyl) urea maleate.

Mechanism of Action

12 CLINICAL PHARMACOLOGY 12.1 Mechanism of Action Glasdegib is an inhibitor of the Hedgehog pathway. Glasdegib binds to and inhibits Smoothened, a transmembrane protein involved in hedgehog signal transduction. In a murine xenotransplant model of human AML, glasdegib in combination with low-dose cytarabine, inhibited increases in tumor size and reduced the percentage of CD45+/CD33+ blasts in the marrow to a greater extent than glasdegib or low-dose cytarabine alone. 12.2 Pharmacodynamics Cardiac Electrophysiology The effect of glasdegib administration on corrected QT interval (QTc) was evaluated in a randomized, single-dose, double-blind, 4-way crossover, placebo- and open-label moxifloxacin-controlled study in 36 healthy subjects.

Indications

  • 1 INDICATIONS AND USAGE DAURISMO is indicated, in combination with low-dose cytarabine, for the treatment of newly-diagnosed acute myeloid leukemia (AML) in adult patients who are ≥75 years old or who have comorbidities that preclude use of intensive induction chemotherapy. DAURISMO is a hedgehog pathway inhibitor indicated, in combination with low-dose cytarabine, for the treatment of newly-diagnosed acute myeloid leukemia (AML) in adult patients who are ≥75 years old or who have comorbidities that preclude use of intensive induction chemotherapy. ( 1 )

Common Doses

  • 100 mg
  • 20 mg
  • 50 mg
  • 15 mg

Dosage

2 DOSAGE AND ADMINISTRATION Recommended dosage: 100 mg orally once daily. ( 2.1 ) 2.1 Recommended Dosage and Schedule The recommended dosage of DAURISMO is 100 mg orally once daily on days 1 to 28 in combination with cytarabine 20 mg subcutaneously twice daily on days 1 to 10 of each 28-day cycle in the absence of unacceptable toxicity or loss of disease control. For patients without unacceptable toxicity, treat for a minimum of 6 cycles to allow time for clinical response. Administer DAURISMO with or without food. Do not split or crush DAURISMO tablets.

Black Box Warning

WARNING: EMBRYO-FETAL TOXICITY DAURISMO can cause embryo-fetal death or severe birth defects when administered to a pregnant woman. DAURISMO is embryotoxic, fetotoxic, and teratogenic in animals [see Warnings and Precautions (5.1) , Use in Specific Populations (8.1) ] . Conduct pregnancy testing in females of reproductive potential prior to initiation of DAURISMO treatment. Advise females of reproductive potential to use effective contraception during treatment with DAURISMO and for at least 30 days after the last dose [see Warnings and Precautions (5.1) , Use in Specific Populations (8.1 , 8.

Contraindications

  • 4 CONTRAINDICATIONS None. None. ( 4 )

Side Effects

  • 6 ADVERSE REACTIONS The following clinically-significant adverse reactions are described elsewhere in the labeling: • QTc Interval Prolongation [see Warnings and Precautions (5.2) ] • Musculoskeletal Adverse Reactions [see Warnings and Precautions (5.3) ] Most common adverse reactions (incidence ≥20%) are anemia, fatigue, hemorrhage, febrile neutropenia, musculoskeletal pain, nausea, edema, thrombocytopenia, dyspnea, decreased appetite, dysgeusia, mucositis, constipation, and rash. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Pfizer, Inc.

Interactions

  • 7 DRUG INTERACTIONS Table 5. Drug Interactions with DAURISMO Strong CYP3A Inhibitors Clinical Impact • Co-administration of DAURISMO with strong CYP3A inhibitors increased glasdegib plasma concentrations [see Clinical Pharmacology (12.3) ]. • Increased glasdegib concentrations may increase the risk of adverse reactions including QTc interval prolongation [see Warnings and Precautions (5.2) ] . Prevention or Management • Consider alternative therapies that are not strong CYP3A4 inhibitors during treatment with DAURISMO.