<prompt> All true about sodium Thiopentone except:-It is ultrasho acting barbiturateIt is cerebroprotectiveIt is induction agent of choice in neurosurgeryIt is contraindicated in acute intermittent porphyria  <response>: Thiopentone is cerebroprotective but not agent of choice for neurosurgery. It is obsolete drug in anaesthesia and at most of the centres it has been replaced by Propofol. Two Non Anaesthetic use 1. Narcoanalysis 2. neuroprotection 