Adverse reactions in randomised controlled trials
| Treatment group (no) | Control group (no) | |
| Electrolyte imbalance | 14 | 85 |
| Digitalis poisoning | 13 | 65 |
| Arrhythmia | 9 | 40 |
| Dry cough | 6 | 20 |
| Nausea/diarrhoea | 14 | 20 |
| Hypotension | 1 | 11 |
| Dizziness/headache | 15 | 10 |
| Dry mouth/feverish dysphoria | 37 | 1 |
| Drowsiness | 17 | 0 |