Pharmacological treatment v placebo for acute migraine (range)*
| Outcomes | Treatment | Placebo | RBI | NNT |
|---|---|---|---|---|
| *Abbreviations defined in glossary. | ||||
| Headache relief at 2 h | 34% to 79% | 22% to 35% | 150% to 280% | 2 to 6 |
| Headache relief at 1 h | 14% to 70% | 8.9% to 26% | 110% to 320% | 3 to 11 |
| Pain free at 2 h | 11% to 60% | 4.7% to 12% | 240% to 640% | 3 to 9 |
| Sustained relief at 24 h | 35% to 53% | 14% to 27% | 150% to 300% | 4 to 9 |