Metronidazole

Metronidazole is an antimicrobial medication used against anaerobic bacteria and certain protozoa. Microbial enzymes activate it into compounds that damage DNA and disrupt essential cellular processes.

Anaerobic metabolism: Cellular energy production that proceeds without oxygen as the final electron acceptor. Low-oxygen microbial metabolism enables activation of metronidazole.
Bacterial vaginosis: A vaginal condition caused by a shift in the normal microbial community, often involving anaerobic bacteria. Metronidazole is a standard treatment option for this anaerobe-associated condition.
Tinidazole: A nitroimidazole antimicrobial used against protozoa and anaerobic bacteria. It has overlapping uses but differs in dosing and duration of action.
Metronidazole-associated encephalopathy: A rare neurological toxicity associated with metronidazole exposure, sometimes involving characteristic brain MRI findings. This uncommon adverse effect is linked to prolonged or high cumulative exposure.
Redox potential: A measure of a chemical species’ tendency to gain or lose electrons. Metronidazole activation depends on microbes reducing its nitro group.
Trichomoniasis: A sexually transmitted infection caused by the protozoan Trichomonas vaginalis. Metronidazole is a principal treatment for this protozoal infection.
Secnidazole: A long-acting nitroimidazole antimicrobial used for selected protozoal and bacterial infections. Its single-dose options contrast with many metronidazole regimens.
Peripheral neuropathy: Damage or dysfunction of nerves outside the brain and spinal cord. Prolonged metronidazole treatment can cause sensory neuropathy.
DNA damage: Physical or chemical alteration of DNA that can impair replication and gene expression. Activated metronidazole forms reactive products that damage microbial DNA.
Giardiasis: An intestinal infection caused by the protozoan Giardia duodenalis. Metronidazole is one medication used to treat giardiasis.

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