RESUMO
CONTEXT: Studies suggest that dexmedetomidine-an intravenous central-acting α2-adrenergic agonist that effectively reduces anxiety among critically ill patients-is being used in patients with severe alcohol withdrawal. However, evidence supporting its use is limited, and it is not approved for this indication. OBJECTIVE: To assess the effect of dexmedetomidine on severe alcohol withdrawal symptoms and to compare its use with benzodiazepines alone. DESIGN: A retrospective, cohort study of 77 patients admitted to the adult medical intensive care unit with severe alcohol withdrawal between January 1, 2009, and October 31, 2013. MAIN OUTCOME MEASURES: The difference in lorazepam equivalents and Clinical Institute Withdrawal Assessment for Alcohol scores in the 24 hours before and after initiation of dexmedetomidine therapy. RESULTS: The frequency of dexmedetomidine use increased dramatically between 2009 and 2013 (16.7% vs 82.4%; p = 0.01). Initiation of dexmedetomidine therapy was associated with significant improvements in Clinical Institute Withdrawal Assessment for Alcohol scores over corresponding 24-hour intervals (14.5 vs 8.5; p < 0.01). Benzodiazepine use also decreased, but the difference was not statistically significant at 24 hours (p = 0.10). Dexmedetomidine was well tolerated, requiring discontinuation of therapy in only 4 patients (10.5%). Dexmedetomidine use was also associated with significantly longer hospitalizations (p < 0.01). CONCLUSION: Dexmedetomidine initiation was associated with a reduction in short-term alcohol withdrawal symptoms in patients in the intensive care unit, with only a few patients experiencing adverse events. However, its use was also associated with longer hospitalizations. Further research is necessary to evaluate whether dexmedetomidine is efficacious or cost-effective in severe alcohol withdrawal.
