Antihistamines dyskinesias caused

Usually classified as an antihistamine but has weak neuroleptic qualities and can cause tardive dyskinesia. 

The drug exerts its distinet eentral actions to suppress tremor as well as rigidity that are gainfully employed therapeutically in Parkinsonism. It is also employed for the treatment of extrapyramidal dyskinesia but certainly not tardive dyskinesia which is caused due to the administration of various potent tranquillizers, namely reserpine, chlorpromazine (CPZ) ete. It may be worthwhile to mention here that the drug fails to cause any sort of central stimulation Q.e., a definite plus point), and instead produces the characteristic sedative effect normally seen amongst the antihistaminics. 

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