a tranquilizer.

tranquilizer used to treat psychotic conditions when a calming effect is desired

Medicine which produces symptoms resembling those of diseases of the nervous system.

an antipsychotic drug

Any of a class of drugs used to treat psychosis, particularly schizophrenia.

a class of medications, such as Haldol, which were originally used to treat schizophrenia, but are also useful for treating tics.