Pregabalin
| n | % | |
| Total switch to pregabalin | 12 | |
| Rationale for change to pregabalin | ||
| Lethargy | 2 | 17 |
| Ongoing symptoms | 6 | 50 |
| Elevated liver enzymes | 1 | 8 |
| Improvement reducing over time | 3 | 25 |
| Efficacy of pregabalin | ||
| Deteriorated | 0 | 0 |
| None | 2 | 17 |
| Minimal | 6 | 50 |
| Good | 3 | 25 |
| Very good | 0 | 0 |
| Not documented | 1 | 8 |