An adverse effect of neuroleptic drugs is directly correlated positively to the antipsychotic potency of the different compounds. Which of the following is it?
(Ref: KDT 6/e p426, 431) Antipsychotic potency of typical antipsychotic drugs is related to their D2 receptor blocking action. D2 blocking action is also responsible for extrapyramidal adverse effects like muscle dystonia and Parkinsonism etc.