Table 2 Self-reported side effects (multiple answers possible, in descending order, N=1,028).

Side effect	N (%)
Dry mouth	396 (20.3%)
Increased appetite	364 (18.7%)
Red eyes	240 (12.3%)
Tiredness	225 (11.6%)
Euphoria	131 (6.7%)
Sleepiness	122 (6.3%)
Concentration problems	74 (3.8%)
Thinking problems	64 (3.3%)
Tiredness	48 (2.5%)
Problems with attention	47 (2.4%)
Gait problems	35 (1.8%)
Reduced appetite	26 (1.3%)
Hypotonia	26 (1.3%)
Balance problems	19 (1.0%)
Vertigo	13 (0.7%)
Headache	8 (0.4%)
General sensation of worsened health	8 (0.4%)
Mood problems	6 (0.3%)
Nausea	5 (0.3%)
Diarrhea	5 (0.3%)
Problems with sight	5 (0.3%)
Vomiting	2 (0.1%)