text: We conclude that granisetron is a better anti-emetic than perphenazine for the long-term prevention of post-operative vomiting in children undergoing general anaesthesia for tonsillectomy .
entities.text: granisetron
entities.type: intervention
entities.text: perphenazine
entities.type: intervention
entities.text: long-term prevention of post-operative vomiting
entities.type: outcome
entities.text: children undergoing general anaesthesia for tonsillectomy .
entities.type: participant