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PNU-22394

PNU-22394, or PNU-22394A, also known as U-22394A, as well as 6-methyl-1,2,3,4,5,6-hexahydroazepino[4,5-b]indole, is a serotonin 5-HT2 receptor agonist of the ibogalog family which was studied as an appetite suppressant and antipsychotic but was never marketed. As an ibogalog, PNU-22394 is a cyclized tryptamine and a simplified ibogaine analogue.

Pharmacology
PNU-22394 acts as a potent modulator of the serotonin 5-HT2A, 5-HT2B, and 5-HT2C receptors. PNU-22394 produces anorectic effects and weight loss in both animals and humans as well as pro-cognitive-like effects in animals. The anorectic effects of PNU-22394 in animals can be blocked by the selective serotonin 5-HT2C receptor antagonist SB-242084. ==History==
History
PNU-22394 was first described in the scientific literature by 1967. It was originally evaluated by Upjohn in people with schizophrenia in the 1960s. It showed no antipsychotic effects, but did unexpectedly produce weight loss in most of the patients. Subsequently, in the 2000s, PNU-22394 was studied as an appetite suppressant and weight loss medication. ==Analogues==
Analogues
Various analogues of PNU-22394 have also been studied and described. ==See also==
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