Compare Glucotrol vs. Human Insulin

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

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Glucotrol (glipizide)

Prescription only

Humulin (Human Insulin)

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.

3.2/ 5 average rating with 332 reviewsforGlucotrol
Lowers blood sugar.

This form of insulin is one of the few medications in its class that you can get without a prescription, but it's expensive.

3.6/ 5 average rating with 57 reviewsforHuman Insulin
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.
  • Some types of this medication are available without a prescription.
  • Available as a shot to be injected into the fatty part of the skin, and as a powder to be inhaled through your nose.
  • Available in different combinations so that you can do one shot or multiple shots a day.
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.
  • Has to be taken exactly as directed or it can cause high or low blood sugar.
  • As with all insulins, you have to work with your doctor closely to make sure you're giving yourself the correct dose, or you can have low or high blood sugar.
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Used for
Dosage forms
  • Pill
  • Extended release pill
  • Injection
  • Inhaler
Price
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Reviews
332 reviews so far
50%
saidit'sworth it
32%
saiditworked well
19%
saidit'sa big hassle

Have you used Glucotrol (glipizide)?

Leave a review
57 reviews so far
67%
saidit'sworth it
46%
saiditworked well
11%
saidit'sa big hassle

Have you used Humulin (Human Insulin)?

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
The Humulin (Human Insulin) FDA package insert doesn’t have numbers about how common side effects are.
Risks and risk factors
  • Serious heart problems
  • Low blood sugar
    • Skipping meals or having inconsistent meal times
    • Drinking alcohol
    • Using other blood sugar-lowering medicine
    • People age 60 or older
    • Those with kidney and/or liver problems
  • 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
  • Changes in blood sugar
  • Changes in skin appearance
  • Weight gain
See more detailed risks and warnings