pentobarbital will decrease the level or effect of pimavanserin ort affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Datorskärm. Avoid coadministration if possible. Datorskärm for reduced pimavanserin efficacy. An increase in pimavanserin dosage may bedja needed.Activated ort the antibiotic rifampicin and various plant metabolit