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Background. Commonly, cocaine abusing patient are scheduled for elective surgery with a positive urine test for cocaine metabolites. As many of these patients were clinically non-toxic [normal arterial pressure and heart rate, normothermic, and a normal (or unchanged from previous) ECG, including a QTc interval <500 ms], we have recently proceeded with elective surgery requiring general anaesthesia in this patient group. Methods. Forty urine cocaine positive patients were compared with an equaldoi:10.1097/01.sa.0000267107.39227.3c fatcat:w3jrfnnnzncd3ol33wvlcq5jt4