<prompt> Drug causing agranulocytosis ?PimozideClozapineRisperidoneOlanzapine  <response>: Ans. is b i.e., Clozapine Agranulocytosis is a known side effect of clozapine Because of the risk of agranulocytosis, patients, recieving clozapine must have weekly blood counts for the first 6 months and every 3 weeks thereafter Side effects of clozapine Agranulocytosis Unstable BP Tachycardia Worsening of diabetes Seisures Urinary incontinence Hypersalivation sialorrhoea Weight gain Sedation 