Side effects in the FMT and placebo group.
| Overall | FMT | Placebo | P values | |
| n | 52 | 26 | 26 | |
| Any side effects (%) | 37 (71.15) | 22 (84.6) | 15 (57.7) | 0.07 |
| Stomach ache (%) | 12 (23.1) | 7 (26.9) | 5 (19.2) | 0.74 |
| Nausea (%) | 16 (30.8) | 9 (34.6) | 7 (26.9) | 0.76 |
| Headache (%) | 6 (11.5) | 3 (11.5) | 3 (11.5) | 1 |
| Fatigue (%) | 5 (9.6) | 1 (3.8) | 4 (15.4) | 0.35 |
| Dizziness (%) | 2 (3.8) | 2 (7.7) | 0 (0.0) | 0.47 |
| Bloating (%) | 6 (11.5) | 5 (19.2) | 1 (3.8) | 0.19 |
| Flatulence (%) | 4 (7.7) | 3 (11.5) | 1 (3.8) | 0.60 |
| Diarrhoea (%) | 6 (11.5) | 6 (23.1) | 0 (0.0) | 0.03* |
| Mucus in the stool (%) | 1 (1.9) | 0 (0.0) | 1 (3.8) | 1 |
| Obstipation (%) | 3 (5.8) | 3 (11.5) | 0 (0.0) | 0.23 |
| Reflux (%) | 5 (9.6) | 2 (7.7) | 3 (11.5) | 1 |
| Rash (%) | 3 (5.8) | 1 (3.8) | 2 (7.7) | 1 |
| Vomiting (%) | 1 (1.9) | 1 (3.8) | 0 (0.0) | 1 |
| Fever sensation (%) | 10 (19.2) | 5 (19.2) | 5 (19.2) | 1 |
| Chest pain (%) | 1 (1.9) | 0 (0.0) | 1 (3.8) | 1 |
| Fever (%) | 2 (3.8) | 2 (7.7) | 0 (0.0) | 0.47 |
| Influenza symptoms (%) | 1 (1.9) | 1 (3.8) | 0 (0.0) | 1 |
| Increased bowel movement (%) | 2 (3.8) | 2 (7.7) | 0 (0.0) | 0.47 |
| Uncomfortable (%) | 2 (3.8) | 2 (7.7) | 0 (0.0) | 0.47 |
*Bold indicates statistical significance,p<0.05.
FMT, faecal microbiota transplantation.