Previous studies have found that intravenous dexamethasone may produce perineal pruritus in some patients when administered as premedicant in the preoperative period. This randomized controlled, double-blind study evaluated the efficacy of pretreatment of lidocaine on the incidence and severity of dexamethasone-induced perineal pruritus. 400 patients were enrolled in this study and allocated randomly into four groups (n=100, in each).
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