Reasons for medication non-adherence that led to hospital admissions
| Reasons for non-adherence to medication | Studies (n) |
| Patient-related | |
| Experienced adverse events or side effects | 42 22 24 32 |
| Perceived as not necessary | 42 22 24 32 |
| Forgetfulness | 32 22 32 |
| Cognitive impairment or because of senility | 224 31 |
| Disliked taking medication | 22 32 |
| Visits to the clinic for continued medication administration considered a burden | 122 |
| Misunderstood the instruction from their general practitioner | 124 |
| Poor social circumstance | 131 |
| Healthcare professional-related | |
| Confusing directions for use | 22 22 |
| Inadequate instruction | 22 32 |
| Switched to a non-conventional prescription | 132 |
| Healthcare system-related | |
| Cost of medication | 22 32 |