Table 2.

Absolute (n) and relative (%) frequency of drug-related problems (DTP) by category.

DTP Category	n (%)
1. Unnecessary medication	42 (9.5)
2. Need for additional drug therapy	96 (21.8)
3. Ineffective medication	19 (4.3)
4. Low dose	86 (19.5)
5. Adverse drug reaction	40 (9.1)
6. High dose	34 (7.7)
7. Non-adherence	124 (28.1)
Total	441 (100.0)