Range of proportion of withdrawals from randomized controlled trials due to adverse effects and perceived lack of efficacy.
| Adverse Effects, % | Perceived Lack of Efficacy, % | |
|---|---|---|
| Topical NSAID | 0–21 | 0–17 |
| Oral NSAID | 0–25 | 2–3 |
| Placebo | 0–16 | 0–12 |
NSAID: nonsteroidal antiinflammatory drugs.