Frequency of different types of errors: medication review method
| Type of medication error | No |
| Dosing | |
| Strength | 205 |
| Dosing frequency | 199 |
| Overdose | 57 |
| No maximum for ‘as needed’ | 99 |
| Underdose | 35 |
| Duration of therapy | 17 |
| Directions for use | 10 |
| Total | 622 |
| Therapeutic | |
| Indication | 19 |
| Contraindication | 19 |
| Drug–drug interaction | 46 |
| Improper monotherapy | 18 |
| (Pseudo)double medication | 40 |
| Therapeutic monitoring | 1 |
| Total | 143 |