[Extrapyramidal reactions in three patients due to droperidol infusion for intravenous patient-controlled analgesia].

Intravenous patient-controlled analgesia (iv-PCA) has a great advantage for pain control in the postoperative period with occasional disadvantages of postoperative nausea and vomiting, which should be treated appropriately. Droperidol is commonly used as anti-emetic drug, but it also has a potential risk to induce extrapyramidal reactions. We report three patients who showed extrapyramidal reactions among 589 patients after droperidol administration. Although this complication is rare, we should be aware of the possible extrapyramidal reactions due to droperidol.