1,2,3,4-Tetrahydro-chromeno[3,4-c]pyridin-5-ones of the formula <IMAGE> wherein R1, R2, R3, and R5 include hydrogen, alkyl, alkoxy, hydroxy, halo, nitro, amino, and trifluoromethyl; R4 is unsubstituted or substituted phenyl, pyridyl, or quinolinyl; and n is 0 to 4, are useful to treat psychosis in mammals, particularly schizophrenia.
Antipsychotic method utilizing certain tetrahydrochromeno[3,4-c]pyridin-5-ones