<prompt> Anaesthetic agent causing hallucination isKetamineEtherNitrous OxideCyclopropane  <response>: Ans. is a i.e. Ketamine Ketamine is an analogue of phencyclidine and therefore it causes hallucinations.Facts you must always remember about Ketamine.It causes Dissociative Anaesthesia It causes sympathetic stimulation which leads to Cardiac stimulation-increase O2 demand Bronchodilation-it is anaesthetic of choice for Bronchial Asthma Increase all pressure-B.P. I.C.T. I.O.P. It causes muscular rigidity It increases salivation so Atropine is always given with it 