Causes of drug-related problems
| C, Cause | Sum |
|---|---|
| C1 Drug selection (total) | 118 |
| C1.6 Too many drugs for indication | 33 |
| C1.7 Not cost-effective choice | 29 |
| C1.3 Inappropriate combination | 27 |
| C1.1 Inappropriate drug | 23 |
| C1.2 No indication for drug | 5 |
| C1.4 Inappropriate duplication | 1 |
| C2 Drug form (total) | 2 |
| C2.1 Inappropriate drug form | 2 |
| C3 Dose selection (total) | 43 |
| C3.5 No therapeutic drug monitoring | 14 |
| C3.1 Drug dose too low | 13 |
| C3.2 Drug dose too high | 11 |
| C3.6 Pharmacokinetic problem | 4 |
| C3.7 Deterioration/improvement of disease | 1 |
| C4 Treatment duration | 14 |
| C4.2 Treatment duration too long | 14 |
| C5 Drug use process | 7 |
| C5.1 Patient gets/takes drug at the wrong times | 5 |
| C5.2 Drug under-used/under-administered | 1 |
| C5.6 Drug abused (unregulated overuse) | 1 |