Side effects by treatment group at day 7
| Side effects | Total No (%) | Placebo No (%) | Aciclovir No (%) |
| n=371 | n=184 | n=187 | |
| Reported any side effects | |||
| Yes | 30 (8.1) | 19 (10.3) | 11 (5.9) |
| No | 341 (91.9) | 165 (89.7) | 176 (94.1) |
| Specified side effects | |||
| Nausea* | 10 (2.7) | 7 (3.8) | 3 (1.6) |
| Vomiting* | 5 (1.3) | 3 (1.6) | 2 (1.1) |
| Diarrhoea | 6 (1.6) | 3 (1.6) | 3 (1.6) |
| Constipation* | 4 (1.1) | 3 (1.6) | 1 (0.5) |
| Headache* | 10 (2.7) | 6 (3.3) | 4 (2.1) |
| Abdominal pains* | 8 (2.2) | 6 (3.3) | 2 (1.1) |
| Renal colic* | 0 | 0 | 0 |
| Fatigue | 8 (2.2) | 4 (2.2) | 4 (2.1) |
| Fever* | 6 (1.6) | 4 (2.2) | 2 (1.1) |
↵* Data missing from one or two participants in each of these categories.