Table 2.

Prescription warning messages generated by computerised system from October 1998 to August 1999

Category	No of warning messages	No (%) of prescriptions completed
Disallowed	58	0
Contraindications	37	0
Interactions	21	0
Password level warnings	749	322 (43)
Contraindications	141	103 (73)
Interactions	99	84 (85)
Maximum recommended single dose exceeded	206	89 (43)
Maximum recommended daily dose exceeded	303	46 (15)
Low level warnings	16 607	15 350 (92)
Contraindications	793	677 (85)
Interactions	15 743	14 635 (93)
Maximum recommended single dose exceeded	46	25 (54)
Maximum recommended daily dose exceeded	25	13 (52)