Metronidazol Noridem Enterprises (Metronidazole)

Metronidazole is employed to eradicate anaerobic bacteria and protozoa across several infection types.

• Bacterial vaginosis: eliminates the anaerobic flora responsible for symptoms and recurrence.
• Trichomoniasis: destroys Trichomonas vaginalis, relieving genital irritation.
• Amoebiasis: eradicates Entamoeba histolytica trophozoites, preventing intestinal disease.
• Giardiasis: clears Giardia lamblia infection, reducing diarrheal episodes.
• Anaerobic bacterial infections: targets a broad range of anaerobes in intra‑abdominal, skin and dental infections.
• Clostridioides difficile infection: suppresses toxin‑producing C. difficile, aiding clinical resolution.

• Metronidazole enters anaerobic microorganisms and is reduced by ferredoxin proteins to reactive nitro radicals. These metabolites bind to DNA, causing strand breakage and inhibition of nucleic acid synthesis, which leads to bacterial and protozoal cell death while sparing aerobic cells.

Metronidazole may cause a range of adverse reactions, from mild to severe.

Common Side Effects

• Nausea: mild to moderate upset stomach.
• Metallic taste: transient metallic sensation in the mouth.
• Headache: occasional dull or throbbing pain.
• Diarrhea: loose stools that may be self‑limiting.
• Abdominal pain: cramping or discomfort.
• Dizziness: light‑headed feeling, especially on standing.

Serious or Rare Side Effects

• Severe allergic reactions: rash, swelling, or anaphylaxis.
• Seizures: rare neurologic events.
• Peripheral neuropathy: tingling or numbness in extremities.
• Stevens‑Johnson syndrome: severe skin blistering.
• Pancytopenia: reduction in blood cell counts.
• Hepatotoxicity: elevated liver enzymes or jaundice.

Before initiating therapy, clinicians should evaluate patient‑specific factors and follow safe handling practices.

• Renal function assessment: adjust dosing in impaired kidneys.
• Hepatic monitoring: watch for liver enzyme elevation.
• Alcohol avoidance: prevent disulfiram‑like reactions.
• Pregnancy consideration: use only if benefits outweigh unknown risks.
• Hypersensitivity screening: discontinue if allergic signs appear.
• Store at ambient temperature: keep in original container, protect from moisture and direct light.

Metronidazole can alter the activity of several co‑administered drugs; careful review is required.

Major Interactions (Avoid)

• Alcohol: may cause severe flushing, tachycardia, and hypotension.
• Warfarin: potentiates anticoagulant effect, increasing bleeding risk.
• Lithium: can raise serum lithium levels, leading to toxicity.

Moderate Interactions (Monitor Closely)

• Phenytoin: may reduce metronidazole concentrations.
• Cimetidine: can increase metronidazole plasma levels, requiring observation.