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What Is Flagyl?

Flagyl is a brand name for metronidazole, a prescription antimicrobial medicine. Oral Flagyl treats certain bacterial and parasitic infections. The condition being treated determines the dose and length of treatment.

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What Is Flagyl?

Flagyl is a brand name for metronidazole, a prescription antimicrobial medicine. Oral Flagyl treats certain bacterial and parasitic infections. The condition being treated determines the dose and length of treatment.

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What Is Flagyl Used For?

Flagyl treats infections caused by susceptible bacteria that grow without oxygen. It also treats certain parasitic infections, including trichomoniasis and amebiasis. A clinician selects treatment after considering the infection and the patient's health.

How Does Flagyl Work?

Metronidazole enters susceptible organisms and damages their genetic material. This stops them from multiplying and helps clear the infection. It does not treat viral illnesses such as colds or flu.

How Is Flagyl Taken?

Oral Flagyl is taken on the schedule prescribed for the infection. Finish the prescribed course unless the treating clinician tells you to stop. Avoid alcohol and products containing propylene glycol during treatment and for at least three days afterward, as directed in the product labeling.

What Are the Side Effects and Precautions?

Nausea, stomach discomfort, and a metallic taste can occur. Tell a clinician about numbness, tingling, seizures, or other new nerve symptoms. Flagyl can interact with medicines such as warfarin, so review your medication list with the prescriber.

Frequently Asked Questions About Flagyl

Is Flagyl an antibiotic?

Yes. Metronidazole is an antimicrobial used against certain bacteria and parasites. It does not treat viruses.

Can I drink alcohol while taking Flagyl?

The product labeling says to avoid alcohol during treatment and for at least three days after the last dose. Drinking can cause symptoms such as nausea, cramps, and flushing.

Does Flagyl treat trichomoniasis?

Yes. Oral Flagyl is used to treat confirmed trichomoniasis. The treating clinician can advise whether sexual partners also need treatment.

Should I stop Flagyl when I feel better?

Take it for the prescribed course unless a clinician directs otherwise. Stopping early can leave the infection incompletely treated.

References

FLAGYL- metronidazole capsule. DailyMed (National Library of Medicine). https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=a2883ca1-5a9a-4259-9d80-46ab67274384. Date Accessed October 6, 2026.

Metronidazole. MedlinePlus. https://medlineplus.gov/druginfo/meds/a689011.html. Date Accessed October 6, 2026.

Metronidazole. StatPearls (NCBI Bookshelf). https://www.ncbi.nlm.nih.gov/books/NBK539728/. Date Accessed October 6, 2026.

Metronidazole (oral route) - Side effects & dosage. Mayo Clinic. https://www.mayoclinic.org/drugs-supplements/metronidazole-oral-route/description/drg-20064745. Date Accessed October 6, 2026.

Metronidazole Capsules or Tablets: Uses & Side Effects. Cleveland Clinic. https://my.clevelandclinic.org/health/drugs/18989-metronidazole-capsules-or-tablets. Date Accessed October 6, 2026.