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To compare the effect of preoperative administration of an antihistamine, an analgesic, or a placebo on postoperative pain in maxillary molar teeth with symptomatic apical periodontitis.Design: A randomized, controlled trial.

european endodontic journal

The Effect of Preoperative Administration of Antihistamine, Analgesic and Placebo on Postoperative Pain in Teeth with Symptomatic Apical Periodontitis: A Randomized Controlled Trial