| Purpose | Patients | Evaluations | Perceived Effectiveness |
|---|---|---|---|
| Epilepsy | 1,201 | 198 | |
| Bipolar disorder | 779 | 93 | |
| Bipolar II disorder | 161 | 26 | |
| Bipolar I disorder | 133 | 18 | |
| Pain | 56 | 26 |
Common side effects
| Side effect | Patients | Percentage |
|---|---|---|
| Dizziness | 20 | |
| Excessive daytime sleepiness (somnolence) | 14 | |
| Fatigue | 13 | |
| Drowsiness | 12 | |
| Dry mouth | 12 | |
| Problems concentrating | 11 |
Side effect severity
| Severity | Evaluations | Percentage |
|---|---|---|
| Severe | 82 | |
| Moderate | 112 | |
| Mild | 130 | |
| None | 143 |