Interactions : אינטראקציות

7 DRUG INTERACTIONS
7.1 Effect of Other Drugs on BRAFTOVI
Strong or Moderate CYP3A4 Inhibitors
Coadministration of BRAFTOVI with a strong or moderate CYP3A4 inhibitor increases encorafenib plasma concentrations [see Clinical Pharmacology (11.3)] and may increase encorafenib adverse reactions. Avoid coadministration of BRAFTOVI with strong or moderate CYP3A4 inhibitors, including grapefruit juice. If coadministration is unavoidable, reduce the BRAFTOVI dose [see Dosage and Administration (2.6)].
Strong CYP3A4 Inducers
Coadministration of BRAFTOVI with a strong CYP3A4 inducer may decrease encorafenib plasma concentrations [see Clinical Pharmacology (11.3)] and may decrease encorafenib efficacy. Avoid coadministration of BRAFTOVI with strong CYP3A4 inducers.
7.2 Effect of BRAFTOVI on Other Drugs
Sensitive CYP3A4 Substrates
BRAFTOVI is a strong CYP3A4 inducer at steady-state. Concomitant use of BRAFTOVI may decrease the plasma concentrations of CYP3A4 substrates (including hormonal contraceptives ), [see Clinical Pharmacology (11.3)], which may reduce the efficacy of these substrates. Avoid the coadministration of BRAFTOVI with CYP3A4 substrates for which a decrease in plasma concentration may lead to reduced efficacy of the substrate. If the coadministration cannot be avoided, see the CYP3A4 substrate product labeling for recommendations.
OATP1B1, OATP1B3, or BCRP Substrates
Coadministration of BRAFTOVI with OATP1B1, OATP1B3, or BCRP substrates can result in increased concentrations of the substrates, and may increase toxicity of these agents. When used in combination, monitor patients closely for signs and symptoms of increased exposure and consider adjusting the dose of these substrates [see Clinical Pharmacology (11.3)].
7.3 Drugs That Prolong the QT Interval
BRAFTOVI is associated with dose-dependent QTc interval prolongation [see Warnings and Precautions (5.5), Clinical Pharmacology (11.2)]. Avoid coadministration of BRAFTOVI with drugs known to prolong the QT/QTc interval.