| Purpose | Patients | Evaluations | Perceived Effectiveness |
|---|---|---|---|
| Pain | 19 | 8 | |
| Breakthrough pain | 11 | 10 | |
| Fibromyalgia | 6 | 2 | |
| Back pain | 1 | 1 | |
| Bursitis | 1 | 1 |
Common side effects
| Side effect | Patients | Percentage |
|---|---|---|
| Constipation | 5 | |
| Nausea | 3 | |
| Chronic constipation | 1 | |
| Difficulty falling asleep | 1 | |
| Fatigue | 1 | |
| Headaches | 1 |
Side effect severity
| Severity | Evaluations | Percentage |
|---|---|---|
| Severe | 1 | |
| Moderate | 4 | |
| Mild | 7 | |
| None | 7 |