Adagrasib

See full prescribing information for clinically significant drug interactions with KRAZATI. ( 7 ) • Strong CYP3A4 Inducers : Avoid concomitant use. ( 7.1 ) • Strong CYP3A4 Inhibitors : Avoid concomitant use until adagrasib concentrations have reached steady state. ( 7.1 ) • Sensitive CYP3A4 Substrates : Avoid concomitant use with sensitive CYP3A4 substrates. ( 7.2 ) • Sensitive CYP2C9 or CYP2D6 Substrates or P-gp Substrates : Avoid concomitant use with sensitive CYP2C9 or CYP2D6 substrates or P-gp substrates where minimal concentration changes may lead to serious adverse reactions. ( 7.2 ) • Drugs That Prolong QT Interval : Avoid concomitant use with KRAZATI. ( 7.3 )

7.1 Effects of Other Drugs on KRAZATI Strong CYP3A4 Inducers Avoid concomitant use of KRAZATI with strong CYP3A inducers. Adagrasib is a CYP3A4 substrate. Concomitant use of KRAZATI with a strong CYP3A inducer reduces adagrasib exposure [see Clinical Pharmacology (12.3) ] , which may reduce the effectiveness of KRAZATI. Strong CYP3A4 Inhibitors Avoid concomitant use of KRAZATI with strong CYP3A inhibitors until adagrasib concentrations have reached steady state (after approximately 8 days). Adagrasib is a CYP3A4 substrate.

If adagrasib concentrations have not reached steady state, concomitant use of a strong CYP3A inhibitor will increase adagrasib concentrations, [see Clinical Pharmacology (12.3) ], which may increase the risk of KRAZATI adverse reactions.

7.2 Effects of KRAZATI on Other Drugs Sensitive CYP3A Substrates Avoid concomitant use of KRAZATI with sensitive CYP3A substrates unless otherwise recommended in the Prescribing Information for these substrates. Adagrasib is a CYP3A inhibitor. Concomitant use with KRAZATI increases exposure of CYP3A substrates [see Clinical Pharmacology (12.3) ] , which may increase the risk of adverse reactions related to these substrates. Sensitive CYP2C9 Substrates Avoid concomitant use of KRAZATI with sensitive CYP2C9 substrates where minimal concentration changes may lead to serious adverse reactions unless otherwise recommended in the Prescribing Information for these substrates.

Adagrasib is a CYP2C9 inhibitor. Concomitant use with KRAZATI increases exposure of CYP2C9 substrates [see Clinical Pharmacology (12.3) ] , which may increase the risk of adverse reactions related to these substrates. Sensitive CYP2D6 Substrates Avoid concomitant use of KRAZATI with sensitive CYP2D6 substrates where minimal concentration changes may lead to serious adverse reactions unless otherwise recommended in the Prescribing Information for these substrates. Adagrasib is a CYP2D6 inhibitor. Concomitant use with KRAZATI increases exposure of CYP2D6 substrates [see Clinical Pharmacology (12.3) ] , which may increase the risk of adverse reactions related to these substrates.

P-gp Substrates Avoid concomitant use of KRAZATI with P-gp substrates where minimal concentration changes may lead to serious adverse reactions unless otherwise recommended in the Prescribing Information for these substrates. Adagrasib is a P-gp inhibitor. Concomitant use with KRAZATI increases exposure of P-gp substrates [see Clinical Pharmacology (12.3) ] , which may increase the risk of adverse reactions related to these substrates.

7.3 Drugs That Prolong QTc Interval Avoid concomitant use of KRAZATI with other product(s) with a known potential to prolong the QTc interval. If concomitant use cannot be avoided, monitor electrocardiogram and electrolytes prior to starting KRAZATI, during concomitant use, and as clinically indicated [see Warnings and Precautions (5.2) ]. Withhold KRAZATI if the QTc interval is > 500 ms or the change from baseline is > 60 ms [see Dosage and Administration (2.3) ]. Adagrasib causes QTc interval prolongation [see Clinical Pharmacology (12.2) ].

Concomitant use of KRAZATI with other products that prolong the QTc interval may result in a greater increase in the QTc interval and adverse reactions associated with QTc interval prolongation, including Torsade de pointes, other serious arrythmias, and sudden death [see Warnings and Precautions (5.2) ].

8.1 Pregnancy Risk Summary There are no available data on the use of KRAZATI in pregnant women. In animal reproduction studies, oral administration of adagrasib to pregnant rats and rabbits during the period of organogenesis did not cause adverse development effects or embryo-fetal lethality at exposures below the human exposure at the recommended dose of 600 mg twice daily (see Data) . 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 In a rat embryo-fetal development study, once daily oral administration of adagrasib to pregnant rats during the period of organogenesis resulted in maternal toxicity (reduced body weight and food intake, and adverse clinical signs leading to moribund condition and early termination) and lower fetal body weight at 270 mg/kg dose level (approximately 2 times the recommended dose of 600 mg twice daily based on body surface area [BSA]). Adagrasib induced skeletal malformations, such as bent limbs, and skeletal variations, such as bent scapula, wavy ribs, and supernumerary short cervical ribs at 270 mg/kg, which were secondary to maternal toxicity and reduced fetal body weight.

In a rabbit embryo-fetal development study, once daily oral administration of adagrasib during the period of organogenesis resulted in lower fetal body weight and increased litter frequency of unossified sternebra at 30 mg/kg (approximately 0.11 times the human exposure based on area under the curve [AUC] at the clinical dose of 600 mg twice daily). This skeletal variation was associated with maternal toxicities, including reduced mean body weight and decreased food consumption. Adagrasib exposure did not cause adverse developmental effects and did not affect embryo-fetal survival in rabbits at doses up to 30 mg/kg once daily.