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| Side effect | 100 mg, n = 630 | 200 mg, n = 609 | Placebo, n = 617 |
|---|---|---|---|
| Dizziness | 75 (11.9%) | 94 (15.4%) | 19 (3.1%) |
| Paresthesia | 36 (5.7%) | 46 (7.6%) | 13 (2.1%) |
| Somnolence | 33 (5.2%) | 32 (5.3%) | 14 (2.3%) |
| Nausea | 16 (2.5%) | 29 (4.8%) | 9 (1.5%) |
| Fatigue | 24 (3.8%) | 18 (3.0%) | 1 (0.2%) |
| Lethargy | 12 (1.9%) | 14 (2.3%) | 1 (0.2%) |
