| Purpose | Patients | Evaluations | Perceived Effectiveness |
|---|---|---|---|
| Pain | 6 | 2 | |
| Breakthrough pain | 3 | 1 | |
| Migraine headaches | 2 | 1 | |
| Chronic headache disorder | 1 | 1 | |
| Fibromyalgia | 1 | 0 |
Common side effects
| Side effect | Patients | Percentage |
|---|---|---|
| Excessive daytime sleepiness (somnolence) | 1 | |
| Headaches | 1 |
Side effect severity
| Severity | Evaluations | Percentage |
|---|---|---|
| Severe | 1 | |
| Moderate | 1 | |
| Mild | 3 | |
| None | 2 |