Chronic naltrexone suppresses platelet aggregation induced by adrenaline and 5-hydroxytryptamine in former heroin addicts |
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Authors: | J A García-Sevilla I Ulibarri M T Giralt P Areso R G Oliveros M Gutiérrez |
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Institution: | (1) Present address: Department of Pharmacology, Faculty of Medicine, University of the Basque Country, Leioa;(2) Drug Addiction Unit, Santiago's Hospital, Vitoria, Spain |
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Abstract: | Summary Naltrexone, an opioid receptor antagonist, is used as an adjunct in the treatment of opiate addiction. In former heroin addicts, long-term treatment with naltrexone (350 mg/week for 5 months) resulted in suppression of adrenaline and 5-hydroxytryptamine (5-HT)-induced platelet aggregation. The results demonstrate that sustained blockade of opioid receptors can impair the functional expression of 2-adrenoceptors and 5-HT2 receptors in human platelets. These findings may have negative clinical implications in the treatment of opiate addiction with naltrexone. |
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Keywords: | Naltrexone heroin addicts platelet aggregation 2-adrenoceptors" target="_blank">gif" alt="agr" align="BASELINE" BORDER="0">2-adrenoceptors 5-HT2 receptors |
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