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Updated: May 5, 2026

Nerve Excitability Assessment in Chemotherapy-induced Neurotoxicity
Published on: April 26, 2012
Neurologic complications of metronidazole
Abstract:
Metronidazole (Flagyl®) is an antimicrobial agent commonly used in clinical practice. Although it is generally well tolerated with minimal side effects, there are a host of still under-recognized neurologic complications of metronidazole treatment. The following review is aimed at summarizing current literature pertaining to metronidazole-induced neurotoxicity including clinical syndromes, neuroradiological findings, prognosis and proposed pathophysiology. Recognition of the neurotoxic effects of metronidazole is critical as prompt discontinuation is generally associated with full clinical recovery and radiological resolution.
Abstract:
Complications neurologiques du métronidazole. Le métronidazole (Flagyl®) est un agent antimicrobien utilisé couramment en pratique clinique. Bien qu'il soit généralement bien toléré et que ses effets secondaires soient minimes, il existe une myriade de complications neurologiques du traitement par le métronidazole qui ne sont pas toujours reconnues. Le but de cette revue constitue un sommaire de la littérature actuelle concernant la neurotoxicité induite par le métronidazole dont les syndromes cliniques, les constatations neuroradiologiques, le pronostic et l'hypothèse physiopathologique expliquant cette neurotoxicité. Il est important d'identifier ces effets neurotoxiques du métronidazole étant donné que l'arrět immédiat du traitement est généralement associé à une guérison clinique complète et à la disparition des signes radiologiques.
Insights
Metronidazole, an antimicrobial, can cause under-recognized neurological side effects. Early detection and stopping the drug typically lead to complete recovery and resolution of imaging findings.
Area of Science:
- Neurology
- Pharmacology
- Infectious Diseases
Background:
- Metronidazole is a widely used antimicrobial agent.
- While generally safe, it can cause neurological complications.
- These neurotoxic effects are often under-recognized in clinical practice.
Purpose of the Study:
- To review current literature on metronidazole-induced neurotoxicity.
- To summarize clinical syndromes, neuroradiological findings, prognosis, and pathophysiology.
- To emphasize the importance of recognizing these adverse effects.
Main Methods:
- Literature review of studies on metronidazole neurotoxicity.
- Synthesis of clinical and radiological data.
- Analysis of proposed pathophysiological mechanisms.
Main Results:
- Metronidazole can lead to various neurological syndromes.
- Neuroradiological findings are associated with these syndromes.
- Prompt discontinuation of metronidazole is linked to recovery.
Conclusions:
- Metronidazole-induced neurotoxicity is a critical consideration.
- Early recognition and drug cessation are key for patient outcomes.
- Full clinical and radiological recovery is generally expected upon discontinuation.
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