although loxapine has tended to be less effective than some standard antipsychotic drugs in a few short-term ( 3 to 4 weeks ) studies , it has been superior to a placebo and about as effective as chlorpromazine , haloperidol , trifluoperazine or thiothixene when evaluated after 4 to 12 weeks .
C0040615
antipsychotic drugs
C0039955
thiothixene