Results.—Thirteen trials were appropriate and had available data. Phenothiazines were compared with placebo in 5 trials
and to another active agent in 10 (metoclopramide 4). Phenothiazine was more effective than placebo for headache relief (OR
15.02, 95% confidence interval [CI] 7.57-29.82) and clinical success (OR 8.92, 95% CI 4.08-19.51). Phenothiazines were more
effective than other agents combined (OR 2.04, 95% CI 1.25-3.31) and the metoclopramide subgroup (OR 2.25, 95% CI
1.29-3.92) for clinical success, but no differences were found for headache relief. The clinical success rate of phenothiazines was
78% (95% CI 74-82).