It is commonly used as an intermediate chemical in the manufacture of various antipsychotic neuroleptic psychotropic drugs.  It originally was developed as a synthetic dye in 1883,  and it was introduced by DuPont as an insecticide in 1935.
It is sometimes used as an antihelminthic in livestock. It is used as an industrial chemical in the manufacture of rubber additives.<unk>  pesticides work by affecting the nervous system of insects, inhibiting the breakdown of acetylcholine by disabling the enzyme acetylcholinesterase. Many of the side effects of<unk>  neuroleptic antipsychotics are due to their anticholinergic blocking effects.<unk>  is also a potent alpha-adrenergic blocking agent.
Phenothiazine
Benzodiazepine
Chlorpromazine 
Primidone
Pargyline
Antidepressants
Anxiolytics
Phenazopyridine