RESUMO
To determine the effectiveness of calcium channel blocker, verapamil in the treatment of acute opioid withdrawal syndrome in patients with chronic dependence on opioid. A clinical study. The study was conducted at Psychological Medicine ward, Civil Hospital Karachi from January 1998 to April 1998. A total of twenty [20] patients were admitted for ten [10] days in hospital. No treatment was given during the first two days of admission after abrupt termination of opioid to observe the acute opioid withdrawal signs and symptoms. Then the verapamil was given orally to each patient in a 40mg dose thrice daily from day 3 to day 10 of admission. The intensity of signs and symptoms was recorded by using subjective and objective opiate withdrawal questionnaire. Urine analysis for opioids was done on day 1, 5 and 10 of admission. Verapamil significantly decreased the intensity of signs and symptoms of acute opioid withdrawal from day 4 to day 10 of admission. Urine analyses for opioids were positive on day 1 while zero on day 10. Verapamil was found to be safe and effective for the treatment of signs and symptoms of acute opioid withdrawal in in-door patients without any significant side effect