<prompt> An unconscious pt. of head injury comes in casualty. Examination shows raised intracranial pressure. Which anesthetic agent is contra- indicated :PropofolKetamineEtomidateThiopentone sodium  <response>: Ans. is b i.e. Ketamine Ketamine causes increase in all pressure of body fluids -Increased ICTIncreased IOTIncreased B.P.Therefore it is not used in raised ICT and IOT as it may increase the pressure to morbid levels.Other frequently asked questions about KetamineThe injection of a therapeutic dose of Ketamine produces dissociative anaesthesia.Ketamine is a phencyclidine analogue, it produces HallucinationsKetamine produces profound analgesia.Ketamine is used as anaesthetic where maintenance of blood pressure is important e.g.in states of shock. 