Product image of Metronidazole Norma (Metronidazole) supplied by GNH India

Metronidazole Norma

Active Ingredient:
Metronidazole
Origin:
EU

Metronidazole Norma (Metronidazole)

Metronidazole, the active ingredient in Metronidazole Norma, is a nitroimidazole presented as an injection for intravenous use. It is employed to treat anaerobic bacterial infections and certain protozoal diseases, such as bacterial vaginosis, trichomoniasis, amebic liver abscess and Clostridioides difficile infection, in both adult and pediatric patients as determined by a prescriber.

GNH India supplies Metronidazole Norma as a licensed, GDP‑compliant international pharmaceutical supplier serving hospitals, transplant centres, oncology centres, pharmacies and clinics worldwide, providing reliable sourcing, regulatory support and logistics for global healthcare providers.

Manufacturer / TM Owner

Norma Hellas S.A.

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Indications & Clinical Uses

Metronidazole is indicated for several anaerobic and protozoal infections, acting on organisms that thrive in low‑oxygen environments.

  • Anaerobic bacterial infections: effective in treating intra‑abdominal, pelvic, skin and soft‑tissue infections caused by susceptible anaerobes.
  • Bacterial vaginosis: restores normal vaginal flora by eliminating Gardnerella and other anaerobes.
  • Trichomoniasis: eradicates Trichomonas vaginalis in genital infections.
  • Amebic liver abscess: resolves hepatic lesions caused by Entamoeba histolytica.
  • Clostridioides difficile infection: reduces toxin‑producing C. difficile in selected cases.

How It Works

  • Metronidazole enters susceptible anaerobic bacteria and protozoa by passive diffusion. Inside the cell, its nitro group is reduced to nitro radical anions, which interact with DNA and other macromolecules, causing strand breaks and inhibiting nucleic acid synthesis, ultimately leading to cell death. The reduction process is facilitated by low redox potential of anaerobic organisms, making the drug selectively toxic to these microbes while sparing aerobic cells.

Side Effects

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

Common Side Effects

  • Nausea: mild to moderate upset stomach.
  • Metallic taste: transient metallic sensation in the mouth.
  • Diarrhea: loose stools, usually self‑limiting.
  • Headache: mild headache.
  • Skin rash: mild erythema or pruritus.

Serious or Rare Side Effects

  • Seizures: rare neurologic events, especially with high doses.
  • Peripheral neuropathy: tingling or numbness in extremities.
  • Severe allergic reaction: anaphylaxis, swelling, difficulty breathing.
  • Hepatotoxicity: elevated liver enzymes or jaundice.

Precautions & Warnings

When using Metronidazole, clinicians should observe several precautions to minimize risks.

  • Assess renal and hepatic function: adjust therapy in patients with impairment.
  • Avoid alcohol: concurrent intake can cause a disulfiram‑like reaction.
  • Monitor for neurotoxicity: watch for seizures or peripheral neuropathy during prolonged therapy.
  • Use caution in pregnancy: safety category is unknown; weigh benefits against potential risks.
  • Evaluate for hypersensitivity: discontinue if rash or anaphylaxis occurs.
  • Store at room temperature: keep below 25 °C, protect from moisture and light in original packaging.

Avoid Interactions

Metronidazole can interact with several medicines, affecting its efficacy or safety.

Major Interactions (Avoid)

  • Alcohol: may cause severe flushing, tachycardia, nausea.
  • Warfarin: increased anticoagulant effect, risk of bleeding.
  • Lithium: elevated lithium levels, potential toxicity.

Moderate Interactions (Monitor Closely)

  • Cimetidine: may increase metronidazole plasma concentrations.
  • Phenobarbital: may reduce metronidazole levels, decreasing effectiveness.
  • Oral contraceptives: possible reduction in contraceptive efficacy; advise additional protection.

Frequently Asked Questions

Metronidazole Norma is an intravenous formulation of the antibiotic metronidazole. It is prescribed to treat infections caused by anaerobic bacteria and certain protozoa, including conditions such as bacterial vaginosis, trichomoniasis, amebic liver abscess, intra‑abdominal infections, and selected cases of Clostridioides difficile infection. The specific indication and duration are determined by the treating physician.

Metronidazole penetrates susceptible anaerobic microorganisms and protozoa, where its nitro group undergoes reduction to form reactive nitro radical anions. These radicals bind to DNA and other cellular components, causing strand breaks and inhibiting nucleic acid synthesis, which leads to microbial cell death. The reduction process is favored in low‑oxygen environments, giving the drug selectivity for anaerobes.

The dosing regimen for Metronidazole Norma is individualized by the prescribing clinician based on the type and severity of infection, patient weight, renal and hepatic function, and other clinical factors. Healthcare professionals calculate the appropriate intravenous dose and infusion rate, and they adjust it as needed throughout therapy.

The safety of metronidazole in pregnancy is classified as unknown, and it should be used only when the potential benefit justifies any possible risk to the fetus. Limited data suggest it may be excreted in breast milk; therefore, nursing mothers should discuss alternatives with their healthcare provider before continuing therapy.

To request Metronidazole Norma, submit an enquiry on the product page at gnhindia.com, specifying the required quantity. GNH India works with hospitals, pharmacies and procurement teams worldwide, verifies trade or institutional credentials, and then provides pricing, availability, shipping details—including any cold‑chain requirements—and assistance with import documentation.

Metronidazole is a nitroimidazole that offers rapid bactericidal activity against a broad range of anaerobes and certain protozoa, often with good tissue penetration. Compared with beta‑lactam agents, it does not require renal dose adjustment and is less likely to cause allergic reactions, but it lacks activity against aerobic organisms, so combination therapy may be needed for mixed infections.

Metronidazole Norma should be stored at room temperature, below 25 °C, in its original container to protect it from moisture and light. The product must be kept in a secure, dry area and inspected for particulate matter before use. Do not freeze or expose the vial to extreme temperatures, and follow standard aseptic techniques during preparation and administration.

Metronidazole Norma is administered intravenously by a qualified healthcare professional. The solution is typically diluted in compatible IV fluids and infused over a prescribed period, which may range from a short bolus to a slower infusion depending on the clinical scenario. Administration should follow aseptic procedures and institutional protocols for IV drug delivery.

The most serious adverse reactions to Metronidazole include seizures, peripheral neuropathy, severe allergic responses such as anaphylaxis, and hepatotoxicity. These events are rare but require immediate medical attention. Patients receiving high or prolonged doses should be monitored closely for neurologic symptoms, liver function changes, and signs of hypersensitivity.

Metronidazole is contraindicated in individuals with a known hypersensitivity to metronidazole or other nitroimidazole compounds. It should also be avoided in patients who have experienced severe disulfiram‑like reactions to alcohol while on therapy. Clinicians must evaluate each patient’s medical history, including liver disease and neurologic disorders, before initiating treatment.

Published by

GNH India Pharmaceuticals Limited

Licensed pharmaceutical supplier

Last updated:

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