Compare Gentamicin vs. Flagyl

Head-to-head comparisons of medication uses, side effects, ratings, and more.

Garamycin
(gentamicin)

Flagyl
(metronidazole)

Coming soon.Treats and prevents bacterial infections. Flagyl (metronidazole) is very good at treating certain bacterial infections, but you can't have any alcohol while on it since it'll make you throw up a lot.
Reviews & ratings
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Not enough reviews for this treatment. Help someone out, leave a review!

Have you used Garamycin (gentamicin)?
Worth itNot sureNot worth it

Not enough reviews for this treatment. Help someone out, leave a review!

Have you used Flagyl (metronidazole)?
Worth itNot sureNot worth it
Side effects
GentamicinFlagyl

We haven’t found good data for Gentamicin side effects.

FDA side effect reports for Gentamicin »
  • Headache 18%
  • Nausea 10%
  • Metallic taste 9%
  • Genital itching 5%
  • Diarrhea 4%
  • Stomach problems 4%
  • Dizziness 4%
  • Stuffy nose 3%
  • Abnormal urine 3%
  • Menstrual cramps 3%
More Flagyl side effects »
How it works
GentamicinFlagyl
Coming soon.Flagyl (metronidazole) is an antibiotic that kills bacteria by interacting with their DNA and preventing proteins from being made.
Type of medication
GentamicinFlagyl
Prescription only
Available as
GentamicinFlagyl
  • Eye drops
  • Eye cream, gel, or ointment
  • Cream, gel, or ointment
  • Pill
  • Extended-release pill
  • Injection
Used for
GentamicinFlagyl
  • Bacterial Infection Due To Klebsiella Pneumoniae Bacterial Infection Due To Pseudomonas Bacterial Meningitis Bacterial Sepsis Of Newborn Bacterial Septicemia Citrobacter Infection Eye Infection Infection Due To Enterobacteriaceae Infection Due To Escherichia Coli Infection Of Bone Infection Of Skin AND OR Subcutaneous Tissue Infective Endocarditis Peritonitis Peritonitis
Risk factors for serious side effects
GentamicinFlagyl
    Coming soon.
    • Taking high doses of Flagyl (metronidazole)
    • Taking Flagyl (metronidazole) for a long time
    • Taking Flagyl (metronidazole) incorrectly
    Detailed Flagyl (metronidazole) risks & warnings »
    Pregnancy

    Research studies with real people found harmful effects on unborn babies, but the benefits might outweigh the risks even if you’re pregnant. Talk with your doctor.

    Research studies with animals haven’t found a risk to unborn babies, but it hasn’t been properly studied in humans.

    Interactions
    GentamicinFlagyl
    No interactions related info.
    • Alcohol interacts with Flagyl (metronidazole) to cause a serious reaction in people that includes stomach upset, throwing up, feeling sick, or turning red. Avoid alcohol while you're taking Flagyl (metronidazole), and for 3 days after you're done taking it.
    Alcohol
    GentamicinFlagyl
    No alcohol related info.
    • Don't drink any alcohol (don't even use mouthwash with alcohol in it) while taking Flagyl (metronidazole) and for at least 3 days after using it, because it can cause a serious reaction in your stomach and make you throw up.
    • You can't drink alcohol while on Flagyl (metronidazole), and for at least 3 days after you finish it.
    Food
    GentamicinFlagyl
    No food related info.
    • If you're on blood thinners, let your doctor know. Flagyl (metronidazole) can interact with your medicines and make you more likely to bleed.
    Upsides and benefits
    GentamicinFlagyl
    Coming soon
    • Flagyl (metronidazole) is good at killing a variety of bacteria.
    • Unlike many other antibiotics, Flagyl (metronidazole) is less likely to make bacteria resistant to it.
    • Most forms are available as a generic, so it's relatively cheap.
    Downsides and risks
    GentamicinFlagyl
    Coming soon
    • You can't drink alcohol while on Flagyl (metronidazole), and for at least 3 days after you finish it.
    • Side effects can include nausea, headache, stomach upset, and a metallic taste in your mouth.
    • If you're taking Flagyl (metronidazole) for a long time, there's a risk of more side effects, such as nerve damage.
    • If you're on blood thinners, let your doctor know. Flagyl (metronidazole) can interact with your medicines and make you more likely to bleed.
    Tips from our pharmacists for people taking the medication
    GentamicinFlagyl
    Coming soon
    • Don't drink any alcohol (don't even use mouthwash with alcohol in it) while taking Flagyl (metronidazole) and for at least 3 days after using it, because it can cause a serious reaction in your stomach and make you throw up.
    • Take this medicine exactly as your doctor or pharmacist tells you. Don't stop taking it early, or the bacteria left in your body could become resistant.
    • If you're taking the extended-release (ER) form, take it 1 hour before, or 2 hours after you eat.
    Learn more
    More about GentamicinSide effectsReviews & ratingsFDA package insert
    Have you used Garamycin (gentamicin)?
    Worth itNot sureNot worth it
    More about FlagylSide effectsReviews & ratingsAlternativesFDA package insert
    Have you used Flagyl (metronidazole)?
    Worth itNot sureNot worth it