- Have discontinued the use of strong inhibitors or inducers of cytochrome P450 (CYP)1A2 and/or CYP2D6 (e.g. fluvoxamine, citalopram, fluoxetine, paroxetine, omeprazole, and rifampicin) and beta-blockers, applying a washout period of 5 half lives or 7 days, whichever is longer, AND be stabilized on non-interacting alternative medication (i.e. medication not interacting with asenapine pharmacokinetics) for 2 weeks prior to baseline if their medical condition requires this