Compare Glucotrol vs. metformin

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

Glucotrol (glipizide)

Prescription only

Glucophage (metformin)

Prescription only
Lowers blood sugar.

Glucotrol (glipizide) is an effective medicine for lowering blood sugar, but it can cause your blood sugar level to be too low so you must always carry some form of sugar with you that can be readily used.

4.3/ 7 average rating with 332 reviewsforGlucotrol
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
Upsides
  • Lowers A1c levels by 1-2%.
  • Glucotrol (glipizide) is an oral medicine so it might be a good alternative for those who don't like injections.
  • Protects your organs and blood vessels by preventing the harmful effects of high blood sugar levels.
  • Okay to use by people with kidney problems.
  • Available as a generic form and is relatively cheap.
  • 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.
Downsides
  • Has a higher risk than other diabetes medicine for causing blood sugar levels to be too low.
  • While taking Glucotrol (glipizide), your blood sugars should be checked 2 to 5 times a week, but less often once you are on a stable dose.
  • Can cause mild weight gain of 2-3lb.
  • Might lose its effectiveness over time.
  • Needs to be taken 30 minutes before a meal for it to be most effective.
  • 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.
Used for
Dosage forms
  • Pill
  • Extended release pill
  • Pill
  • Extended release pill
  • Liquid
Price
Lowest price near you
$9.99
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Lowest price near you
$4
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Reviews
332 
50%
think this treatment is worth it
32%
think this treatment works well
19%
think this treatment is a hassle

Have you used Glucotrol (glipizide)?

Leave a review
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
Side effects
9possible side effects
  • Dizziness
    7%
  • Diarrhea
    5%
  • Nervousness
    4%
  • Tremor
    4%
  • Low blood sugar
    3%
  • Constipation
    3%
  • Passing gas
    3%
  • Nausea
    3%
  • Headache
    2%
See more detailed 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
Risks and warnings
  • Low blood sugar

    Skipping meals or having inconsistent meal times

    ...and 4 more risk factors

  • Severe allergic reaction

    History of allergy to sulfa-containing medicine

  • Kidney and liver disease

    Those with kidney and/or liver disease

  • Breakdown of red blood cells

    People with G6PD deficiency

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