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Revisiting the Disulfiram-Like Reaction Between Alcohol and Oral Metronidazole
Ifeoluwa Orire1, Momi Sagoe1, Christina A Muzny2
1From the Department of Epidemiology, Tulane University Celia Scott Weatherhead School of Public Health and Tropical Medicine, New Orleans, LA.
Evidence suggests oral metronidazole (MTZ) may not cause a significant disulfiram-like reaction (DLR) with alcohol. Further research questions the need for strict alcohol abstinence during MTZ treatment.
Area of Science:
- Pharmacology
- Microbiology
Background:
- Oral metronidazole (MTZ), a 5-nitroimidazole, treats anaerobic bacteria and protozoa.
- A disulfiram-like reaction (DLR) with alcohol is a commonly cited side effect of MTZ.
Purpose of the Study:
- To evaluate the evidence supporting the association between oral MTZ and DLR.
- To determine if strict alcohol abstinence is necessary during MTZ therapy.
Main Methods:
- Systematic literature review of PubMed, EMBASE, and Cochrane Central Register.
- Search terms included "disulfiram-like reaction" from 1970 to 2024.
- Inclusion criteria yielded eleven studies for analysis.
Main Results:
- Four case reports and one older trial suggested a potential link between 5-nitroimidazoles and DLR.
- Three clinical trials, a chart review, and two animal studies did not support this interaction.
- The evidence for a clinically significant MTZ-alcohol DLR is weak.
Conclusions:
- The association between oral metronidazole and disulfiram-like reactions with alcohol is not strongly supported by current evidence.
- The necessity of strict alcohol abstinence during MTZ treatment requires re-evaluation.
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