Fananserin (RP-62203) is a drug which acts as a potent antagonist at both the 5HT2A receptor,[1] and the Dopamine D4 receptor,[2] but without blocking other dopamine receptors such as D2.

[3] It has sedative[4] and antipsychotic effects, and has been researched for the treatment of schizophrenia,[5] although efficacy was less than expected and results were disappointing.

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