Table 1.

Types and causes of observed prescription errors.

Cause of error	Number of errors in 1000 prescriptions
	Type B errors	Type C errors	Type D errors	Total
Strength of preparation not mentioned	87			87
Use of brand names	89	9		98
Incomplete description of dosing schedule and dosing instructions	26			26
Illegible handwriting	22	88	23	133
Diagnosis not mentioned			601	601
Age of the patient not mentioned			65	65
Gender not mentioned			02	02
Total	224	97	691	1012