5-HT2A inverse agonist

5-HT2A serotonin receptor inverse agonist

Pimavanserin for Parkinson disease psychosis

Drugs with this mechanism (2)

Norclozapine — Active clozapine metabolite; M1 agonist implicated in some clozapine effects.
Pimavanserin — Selective 5-HT2A inverse agonist; the first drug for Parkinson psychosis, no D2 blockade.

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