- Medications or supplements that are known to be moderate mechanism-based inhibitors or moderate inducers of CYP3A within 7 days or within 5 times the inhibitor or inducer half-life (whichever is longer) before the first dose of study drugs. In general, the use of these agents is not permitted during the study for this combination except in cases in which an AE must be managed. See a list of nonexhaustive moderate CYP3A mechanism-based inhibitors or moderate CYP3A inducers based on the US FDA Draft DDI Guidance.