Compare metformin vs. Janumet

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

Glucophage (metformin)

Prescription only
Lowers blood sugar.

Glucophage (metformin) is the first choice medicine to control your blood sugar and lower the risk of death from diabetes, although a few people may not tolerate the stomach side effects.

5.0/ 7 average rating with 938 reviewsformetformin
Lowers your blood sugar.

Janumet is a combination of two anti-diabetic medicines that work better together, but is available as brand only.

4.5/ 7 average rating with 79 reviewsforJanumet
Upsides
  • Improves sugar control and lowers A1c levels as much as 2%.
  • One of the few diabetes medicines that lowers the risk of death from diabetes-related complications.
  • Doesn't cause weight gain.
  • Rarely causes low blood sugar.
  • This 2-in-1 combination can lower the number of pills you have to take daily.
  • Lowers A1c (average blood sugar over time) up to 2.5%.
  • Available in extended and immediate release forms to allow better control of your blood sugar.
  • Doesn't increase your appetite unlike other anti-diabetic medicines.
  • Does not cause hypoglycemia or very low blood sugar.
Downsides
  • Often causes stomach upset, like diarrhea, nausea, gas, or stomach cramping.
  • Usually not a good choice for people with kidney problems. Your doctor will tell you if Glucophage (metformin) is right for you to take.
  • Excessive or chronic alcohol use can increase the risk of a dangerous side effect.
  • Available as brand name only and may be expensive.
  • Metformin component usually causes upset stomach.
  • Sitagliptin component may increase your risk for throat infections and inflammation of pancreas.
  • Not appropriate for those with poor kidney function.
Used for
Dosage forms
  • Pill
  • Extended release pill
  • Liquid
  • Pill
  • Extended release
Price
Lowest price near you
$4
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Lowest price near you
$415.3
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Reviews
938 
65%
think this treatment is worth it
46%
think this treatment works well
16%
think this treatment is a hassle

Have you used Glucophage (metformin)?

Leave a review
79 
46%
think this treatment is worth it
38%
think this treatment works well
15%
think this treatment is a hassle

Have you used Janumet (sitagliptin / metformin)?

Leave a review
Side effects
7possible side effects
  • Diarrhea
    53%
  • Nausea/vomiting
    26%
  • Gas
    12%
  • Weakness
    9%
  • Indigestion
    7%
  • Stomach pain
    6%
  • Headache
    6%
See more detailed side effects
The Janumet (sitagliptin / metformin) FDA package insert doesn’t have numbers about how common side effects are.
Risks and warnings
  • Excess lactic acid in the blood

    Kidney problems

    ...and 5 more risk factors

See more detailed risks and warnings
  • Excess lactic acid in the blood

    Kidney problems

    ...and 5 more risk factors

See more detailed risks and warnings