| Number of Patients | Dihydroergocryptine | Pramipexole |
| Randomized | 56 | 60 |
| Not included (consent withdrawal) | - | - |
| Safety population | 56 | 60 |
| Completed | 39 | 46 |
| Discontinued | 17 | 14 |
| PP population | 39 | 46 |
| Main cause of discontinuation | ||
| Adverse event (nausea) | 2 | - |
| Abandon (lost to follow up) | 1 | 2 |
| Excluded | 12 | 8 |
| Eliminated | 2 | 4 |