Prescribing of drugs reported to cause adverse reactions.

The way in which data on the prescribing of drugs by doctors in Northern Ireland has been collected and analysed with the aid of electronic data proces sing equipment which was first installed in 1966 has been described by Wade and Hood (1972). The present paper describes changes in Northern Ireland in the prescribing of chloramphenicol, amphetamines, and bronchodilator aerosols, all of which are preparations which in recent years have been found to have serious adverse reactions.