Which general anaesthetic selectively inhibits excitatory NMDA receptors:

Ketamine Intravenous inducing agent. Acts by blocking NMDA receptors. Adverse effects : Hallucinations, delirium and vivid dreams are impoant adverse effects that are seen during recovery from anaesthesia (emergence delirium). Has indirect sympathomimetic action = | blood pressure, hea rate and cardiac output Increases intraocular pressure and intracranial tension Appropriate drug for anesthetizing patients , at high risk of bronchospasm