Ketamine (‘Ketalar’), a recently introduced phencyclidine derivative, is a dissociative anaesthetic agent with a number of unique and useful properties. Its most important advantages are the relatively good preservation of the swallowing and cough reflexes, and its rapid absorption following intramuscular injection. In addition, it has little depressant effect on respiration, while blood pressure is usually raised (Morgan et al., 1971; Bovill et al., 1971). It also has the effect of increasing muscular tone, thus preventing airway obstruction by the tongue.

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