Six infants with a history of wheezing were given temazepam syrup as sedation, to allow lung function tests to be performed. Despite doses ranging from 2.5 mg/kg-4.5 mg/kg only one infant remained a sleep for 1 h, the time taken for full lung function to be assessed. All other infants awoke within 15 min before test could be completed. Three infants developed hiccoughs and three were very irritable after awaking from sedation.