<prompt> Which of the following extrapyramidal effect is seen on chronic use of antipsychotic?DystoniaAkathisiaTardive dyskinesiaParkinsonism  <response>: Ans.C.Tardive dyskinesia Involuntary frowning, sticking out of the tongue, puckering, pursing, lip-smacking movements are seen in tardive dyskinesia due to chronic antipsychotic usage.Consider drug cessation or switch to an atypical antipsychotic in all patients. 