Metronidazole 500 mg Tablet Used For

metronidazole 500 mg tablet used for


Metronidazole, available in a commonly prescribed 500mg tablet form, is an antibiotic and antiprotozoal medication. Hailed for its multi-faceted utility, this medication plays a crucial role in treating various bacterial and parasitic infections. Here, we unravel its uses, mechanisms, and pivotal considerations.

Primary Uses of Metronidazole 500mg Tablet

  1. Bacterial Infections: Metronidazole is a potent weapon against certain bacterial infections, particularly those caused by anaerobic bacteria. This includes bacterial vaginosis, pelvic inflammatory disease, abscesses of the ovary and fallopian tubes, and more.
  2. Gastrointestinal Tract Infections: It’s effective against infections like colitis caused by the Clostridium difficile bacteria.
  3. Protozoal Infections: Metronidazole tackles parasitic infections such as giardiasis, trichomoniasis, and amoebiasis.
  4. Dental Infections: In the realm of dentistry, metronidazole can treat gum infections and abscesses, especially when combined with other antibiotics.

Mechanism of Action

Metronidazole operates by infiltrating bacterial and protozoal cells, subsequently interfering with their DNA. This disruption hinders the microbes’ ability to replicate and proliferate, eventually leading to their demise.

Precautions and Side Effects

While metronidazole is generally safe, it’s imperative to be aware of potential side effects:

  • Gastrointestinal discomfort: Nausea, vomiting, and diarrhea are common.
  • A metallic taste in the mouth.
  • Dark urine.
  • Neurological effects: Headaches, dizziness, or even rare neuropathies.
  • Skin rashes or itching.

Frequently Asked Questions

1. Can I consume alcohol while taking metronidazole?

No, combining alcohol and metronidazole can lead to severe nausea, vomiting, cramps, and other unpleasant reactions.

2. How long should I be on metronidazole?

The duration depends on the infection being treated. It’s crucial to complete the entire prescribed course, even if symptoms subside.

3. Is metronidazole safe during pregnancy?

Metronidazole does cross the placenta. While no direct evidence points to harm, it’s best to consult with a healthcare professional.

4. What should I do if I miss a dose?

Take it as soon as you remember, but if it’s close to your next dose, skip the missed one. Avoid doubling up.


The metronidazole 500mg tablet is an invaluable tool in the medical arsenal against a spectrum of bacterial and protozoal infections. As with any medication, understanding its role, mechanism, and potential side effects ensures optimal, safe usage.