The study was a parallel-groups, placebo-controlled trial of topiramate in heavy drinkers, all of whom received medical management (20 ), a brief psychosocial intervention, at each of 9 treatment visits. Patients were randomly assigned to treatment group and double-blind conditions were maintained throughout the study. Raters were trained in the reliable use of all assessments. The study was conducted in three phases: a one-week pre-treatment assessment period, a 12-week treatment period, and a 9-day medication taper period.