<prompt> Which of the following is true regarding olazapine except-It causes marked anti-muscarinic actionIt causes weight gainIt causes mild increase in prolactinLess epileptogenic action than phenothiazine  <response>: Ans. is d i.e., Less epileptogenic action than phenothiazine o Clozapine and olanzapine are most epileptogenic antipsychotics. o Olanzapine blocks multiple monoaminergic D2, 5-HT2, al, a2 as well as muscarinic and H1receptors. o It causes weight gain o It causes little rise in prolactin level. 