| Drug classes | Cases |
| Proton-pump inhibitors | 142 (45) |
| Anxiolytics and hypnotics | 94 (30) |
| Vitamins | 45 (14) |
| Laxatives | 40 (13) |
| Statins | 29 (9) |
| Acetylsalicylic acid | 27 (8) |
| Electrolytes | 27 (8) |
| Neuroleptic agents | 26 (8) |
| Antidepressants | 23 (7) |
| Others* | 166 (52) |
Data shown are in absolute values (percentage of patients concerned).
*Drug classes concerning <7% of patients.