Table 4.
Absolute and relative frequencies of FORTA category C drugs (i.e. drugs with questionable efficacy–safety profiles in elderly people) and FORTA category D drugs (i.e. drugs that should be avoided in elderly people) with a suspected relationship to adverse drug reactions in the study population
| FORTA category C and D drugs with a suspected relationship to ADR occurrence | n | %a |
|---|---|---|
| FORTA category C drugs | 67 | 100 |
| Risperidone | 11 | 16.4 |
| Pipamperone | 8 | 11.9 |
| Olanzapine | 7 | 10.4 |
| Quetiapine | 6 | 9.0 |
| Venlafaxine | 6 | 9.0 |
| Mirtazapine | 5 | 7.5 |
| Spironolactone | 4 | 6.0 |
| Amitriptyline | 3 | 4.5 |
| Duloxetine | 3 | 4.5 |
| Digoxin | 2 | 3.0 |
| Melperone | 2 | 3.0 |
| Tramadol | 2 | 3.0 |
| Valproic acid | 2 | 3.0 |
| Digitoxin | 1 | 1.5 |
| Doxepin | 1 | 1.5 |
| Gabapentin | 1 | 1.5 |
| Oxycodone | 1 | 1.5 |
| Tilidine | 1 | 1.5 |
| Zopiclone | 1 | 1.5 |
| FORTA category D drugs | 21 | 100 |
| Aripiprazole | 6 | 28.6 |
| Haloperidol | 4 | 19.0 |
| Carbamazepine | 3 | 14.3 |
| Clozapine | 3 | 14.3 |
| Opipramol | 3 | 14.3 |
| Ciprofloxacin | 1 | 4.8 |
| Prednisolone | 1 | 4.8 |
ADR denotes adverse drug reaction, FORTA Fit fOR The Aged
aPercentages may not total 100 due to rounding