Prophylactic Transdermal Scopolamine Patches Reduce Nausea in Postoperative Patients Receiving Epidural Morphine

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Abstract
To evaluate the efficacy of prophylactic transdermal scopolamine in reducing nausea associated with postoperative epidural analgesia, we studied 32 healthy adult women undergoing major gynecologic surgery. The patients were randomized in a double blind fashion to receive either a cutaneous scopolamine patch or a visually identical cutaneous placebo patch. Postoperative analgesia was provided solely with epidural morphine. Nausea was treated with metoclopromide and droperidol. At 24 hours postoperatively, the mean nausea score was significantly lower with scopolamine than with placebo (1 .+-. 2 vs 51 .+-. 42, respectively, P < 0.05). The number of patients reporting "zero nausea" was significantly greater with scopolamine patches than with placebo patches (13 vs 1, P < 0.01). The mean number of times antiemetic drugs were administered per patient was lower with scopolamine than with placebo patches (0.2 .+-. 0.4 vs 2.8 .+-. 2.6, P < 0.05). It is concluded that prophylactic transdermal scopolamine patches reduce nausea in postoperative patients receiving epidural morphine.