Prescription onlyLower-cost generic availableClass: Infection

Flagyl

(Metronidazole)

Prescription onlyLower-cost generic availableClass: Infection
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Treats and prevents bacterial infections.

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Our bottom line

Flagyl (Metronidazole) is a very good way to treat certain bacterial infections, but you can't have any alcohol while on it since it'll make you throw up. A lot.

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Upsides

  • Flagyl (Metronidazole) is extremely effective in killing bacteria.
  • Unlike many other antibiotics, Flagyl (Metronidazole) is less likely to make bacteria resistant to the medication.
  • Available in different forms including a topical (skin) version, a vaginal version, and multiple oral (by mouth) versions.
  • Most forms are available as a generic, so it is relatively cheap.

Downsides

  • You can't drink alcohol while on this medication, and for at least 3 days after you finish Flagyl (Metronidazole).
  • If you're breastfeeding, you'll need to switch to a formula to feed your baby for at least 3 days after you finish taking Flagyl (Metronidazole).
  • Side effects include nausea, constipation, diarrhea, and headache.
  • Your urine can turn a dark red color while on Flagyl (Metronidazole).
  • The oral version of Flagyl 375 mg is only available as brand name so this particular form can be expensive.
How it works

Flagyl (Metronidazole) is an antibiotic that kills bacteria by cutting off their supply of energy and ruining their DNA.

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Side effect rates for Flagyl (Metronidazole)

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These are side effects of Flagyl (Metronidazole) reported to the FDA by people taking it, and by doctors and pharmacists.
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Risks and Warnings for Flagyl (Metronidazole)

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  • There have been reports of people on Flagyl (Metronidazole) who have had changes in their mental status or suffered nerve damage. This is rare, and usually goes away after Flagyl (Metronidazole) is stopped. Call your doctor immediately if you suddenly feel confused, have trouble walking, feel dizzy, or feel numbness or tingling.

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Common concerns from people taking Flagyl (Metronidazole)

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Pregnancy
Alcohol
  • You can't drink alcohol while on this medication, and for at least 3 days after you finish Flagyl (Metronidazole).
  • Don't drink any alcohol while on this (and don't even use mouthwash with alcohol in it) for at least 3 days after using Flagyl (Metronidazole) since it can cause a serious reaction in your stomach and make you throw up.