ASH Clinical News ACN_4.2_FULL_ISSUE | Page 39

For the latest news in hematology, visit ASHClinicalNews.org! CALQUENCE ® (acalabrutinib) capsules, for oral use Table 3: Hematologic Adverse Reactions Reported* in ≥ 20% of Patients with MCL in Trial LY-004 Hematologic Adverse Reactions CALQUENCE 100 mg twice daily N=124 All Grades (%) Grade ≥ 3 (%) Hemoglobin decreased 46 10 Platelets decreased 44 12 Neutrophils decreased 36 15 * Per National Cancer Institute Common Terminology Criteria for Adverse Events (NCI CTCAE) version 4.03; based on laboratory measurements and adverse reactions. Increases in creatinine 1.5 to 3 times the upper limit of normal occurred in 4.8% of patients. DRUG INTERACTIONS Strong CYP3A Inhibitors Clinical • Co-administration of CALQUENCE with a strong CYP3A inhibitor Impact (itraconazole) increased acalabrutinib plasma concentrations [see Clinical Pharmacology (12.3) in the full Prescribing Information]. • Increased acalabrutinib concentrations may result in increased toxicity. Prevention or • Avoid co-administration of strong CYP3A inhibitors with CALQUENCE. Management • Alternatively, if the inhibitor will be used short-term, interrupt CALQUENCE [see Dosage and Administration (2.2) in the full Prescribing Information]. Moderate CYP3A Inhibitors Clinical • Co-administration of CALQUENCE with a moderate CYP3A inhibitor Impact may increase acalabrutinib plasma concentrations [see Clinical Pharmacology (12.3) in the full Prescribing Information]. • Increased acalabrutinib concentrations may result in increased toxicity. Prevention or • When CALQUENCE is co-administered with moderate CYP3A inhibitors, Management reduce acalabrutinib dose to 100 mg once daily. Strong CYP3A Inducers Clinical • Co-administration of CALQUENCE with a strong CYP3A inducer Impact (rifampin) decreased acalabrutinib plasma concentrations [see Clinical Pharmacology (12.3) in the full Prescribing Information]. • Decreased acalabrutinib concentrations may reduce CALQUENCE activity. Prevention or • Avoid co-administration of strong CYP3A inducers with CALQUENCE. Management • If a strong CYP3A inducer cannot be avoided, increase the acalabrutinib dose to 200 mg twice daily. Gastric Acid Reducing Agents • Co-administration of CALQUENCE with a proton pump inhibitor, H2-receptor antagonist, or antacid may decrease acalabrutinib plasma concentrations [see Clinical Pharmacology (12.3) in the full Prescribing Information]. Clinical • Decreased acalabrutinib concentrations may reduce Impact CALQUENCE activity. • If treatment with a gastric acid reducing agent is required, consider using a H2-receptor antagonist (e.g., ranitidine or famotidine) or an antacid (e.g., calcium carbonate). Antacids H2-receptor Prevention or antagonists Management Proton pump inhibitors Separate dosing by at least 2 hours [see Dosage and Administration (2.2) in the full Prescribing Information]. Take CALQUENCE 2 hours before taking the H2-receptor antagonist [see Dosage and Administration (2.2) in the full Prescribing Information]. Avoid co-administration. Due to the long-lasting effect of proton pump inhibitors, separation of doses may not eliminate the interaction with CALQUENCE. USE IN SPECIFIC POPULATIONS Pregnancy Risk Summary Based on findings in animals, CALQUENCE may cause fetal harm when administered to a pregnant woman. There are no available data in pregnant women to inform the drug- associated risk. In animal reproduction studies, administration of acalabrutinib to pregnant rabbits during organogenesis resulted in reduced fetal growth at maternal exposures (AUC) approximately 4 times exposures in patients at the recommended dose of 100 mg twice daily (see Data). Advise pregnant women of the potential risk to a fetus. The estimated background risk of major birth defects and miscarriage for the indicated population is unknown. All pregnancies have a background risk of birth defect, loss, or other adverse outcomes. In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2-4% and 15-20%, respectively. 2 Data Animal Data In a combined fertility and embryo-fetal development study in female rats, acalabrutinib was administered orally at doses up to 200 mg/kg/day starting 14 days prior to mating through gestational day [GD] 17. No effects on embryo-fetal development and survival were observed. The AUC at 200 mg/kg/day in pregnant rats was approximately 16-times the AUC in patients at the recommended dose of 100 mg twice daily. The presence of acalabrutinib and its active metabolite were confirmed in fetal rat plasma. In an embryo-fetal development study in rabbits, pregnant animals were administered acalabrutinib orally at doses up to 200 mg/kg/day during the period of organogenesis (from GD 6-18). Administration of acalabrutinib at doses ≥ 100 mg/kg/day produced maternal toxicity and 100 mg/kg/day resulted in decreased fetal body weights