Nirogacestat

Strong or moderate CYP3A inhibitors : Avoid concomitant use. ( 7.1 ) Strong or moderate CYP3A inducers : Avoid concomitant use. ( 7.1 ) Gastric acid reducing agents : Avoid concomitant use with proton pump inhibitors and H2-receptor antagonists. If concomitant use cannot be avoided, OGSIVEO administration can be staggered with antacids. ( 7.1 )

7.1 Effect s of Other Drugs on OGSIVEO Table 4. Effects of Other Drugs on OGSIVEO Strong or Moderate CYP3A Inhibitors Prevention or Management Avoid concomitant use of OGSIVEO with strong or moderate CYP3A inhibitors including grapefruit products, Seville oranges, and starfruit. Clinical Effect Nirogacestat is a CYP3A substrate. Strong or moderate CYP3A inhibitors increase nirogacestat exposure [see Clinical Pharmacology ( 12.3 ) ], which may increase the risk of OGSIVEO adverse reactions . Strong or Moderate CYP3A Inducers Prevention or Management Avoid concomitant use of OGSIVEO with strong or moderate CYP3A inducers. Clinical Effect Nirogacestat is a CYP3A substrate.

Strong or moderate CYP3A inducers decrease serum nirogacestat exposure [ see Clinical Pharmacology ( 12.3 ) ], which may reduce the effectiveness of OGSIVEO. Gastric Acid Reducing Agents Prevention or Management Avoid concomitant use with proton pump inhibitors and H2 blockers . If concomitant use cannot be avoided, OGSIVEO can be staggered with antacids (e.g., administer OGSIVEO 2 hours before or 2 hours after antacid use). Clinical Effect Nirogacestat is poorly soluble at pH ≥ 6. Gastric acid reducing agents may decrease serum nirogacestat exposure [ see Clinical Pharmacology ( 12.3 ) ], which may reduce the effectiveness of OGSIVEO.

7.2 Effects of OGSIVEO on Other Drugs Table 5. Effects of OGSIVEO on Other Drugs Certain CYP3ASubstrates Prevention or Management Avoid concomitant use with CYP3A substrates where minimal concentration changes may lead to serious adverse reactions . Clinical Effect Nirogacestat increases exposure of CYP3A substrates [see Clinical Pharmacology ( 12.3 ) ], which may increase the risk of adverse reactions related to these substrates.

Certain CYP2C19 Substrates Prevention or Management Avoid concomitant use with OGSIVEO where decreased concentrations of CYP2C19 substrates may lead to significant decreases in efficacy of the CYP2C19 substrate unless otherwise recommended in the Prescribing Information for the CYP2C19 substrate. Clinical Effect Nirogacestat decreases exposure of CYP2C19 substrates [see Clinical Pharmacology ( 12.3 ) ], which may decrease efficacy of these substrates.

8.1 Pregnancy Risk Summary Based on findings from animal studies and its mechanism of action, OGSIVEO can cause fetal harm or loss of pregnancy when administered to a pregnant woman [ see C linical Pharmacology ( 12.1 ) ] . Oral administration of nirogacestat to pregnant rats during the period of organogenesis resulted in embryo-fetal toxicity and embryo-fetal death at maternal exposures below the human exposure at the recommended dose of 150 mg twice daily [see Data ] . There are no available data on the use of OGSIVEO in pregnant women. Advise pregnant women of the potential risk to a fetus. In the U.S.

general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2% to 4% and 15% to 20%, respectively. Data Animal Data Daily oral administration of nirogacestat to pregnant rats during the period of organogenesis resulted in decreased fetal body weights, pre- and post-implantation loss, and fetal subcutis edema at doses ≥ 20 mg/kg/day (approximately 0.85 times the recommended dose of 150 mg twice daily based on area under the curve).