Compare Lantus vs. Levemir

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

Lantus
(Insulin Glargine)

Levemir
(Insulin Detemir)

Lowers blood sugar. Lantus (Insulin Glargine) is a long-acting insulin that provides all-day sugar control. It can cause low blood sugar, so make sure you know what the symptoms are and always have a source of sugar nearby.Lowers blood sugar. Levemir is a long-acting insulin that provides all-day sugar control. It can cause low blood sugar, so make sure you know what the symptoms are and always have a source of sugar nearby.
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Reviews & ratings
Button Group. All currently active
Button Group. All currently active
5.086058519793459Lantus
Reviews for Lantus (Insulin Glargine)
67%
of people say Lantus (Insulin Glargine) is worth it
51%
say it works well
14%
say it's a big hassle
Reviews for Levemir (Insulin Detemir)
44%
23% vs. Lantus (Insulin Glargine)
35%
16% vs. Lantus (Insulin Glargine)
22%
8% vs. Lantus (Insulin Glargine)
Side effects
LantusLevemir

The Lantus FDA package insert doesn’t have numbers about how common side effects are.

More about Lantus side effects »

The Levemir FDA package insert doesn’t have numbers about how common side effects are.

More about Levemir side effects »
How it works
LantusLevemir
Lantus (Insulin Glargine) is a long-acting insulin medicine for diabetes. It acts like the insulin that your body normally makes to process sugars and fats, and it keeps your blood sugar stable throughout the day.Levemir is a long-acting insulin medicine for diabetes. It acts like the insulin that your body normally makes to process sugars and fats, and it keeps your blood sugar stable throughout the day.
Type of medication
LantusLevemir
Anti-diabetic
Insulin
Prescription only
Anti-diabetic
Insulin
Prescription only
Available as
LantusLevemir
  • Injection
  • Injection
Used for (click to learn more)
LantusLevemir
Risk factors for serious side effects
LantusLevemir
  • Insulin dose too high
  • Use of other blood sugar lowering medicines
  • Poor injection techniques
  • Unstable kidney functions
  • Unstable liver functions
  • Use of other medicine that lowers potassium
  • Current electrolyte imbalance
    Detailed Lantus (Insulin Glargine) risks & warnings »
    • Insulin dose too high
    • Use of other blood sugar lowering medicines
    • Poor injection techniques
    • Unstable kidney functions
    • Unstable liver functions
    • Use of other medicine that lowers potassium
    • Current electrolyte imbalance
      Detailed Levemir (Insulin Detemir) risks & warnings »
      Pregnancy category
      LantusLevemir
      CFDA pregnancy category (Weigh risks vs. benefits)

      Research studies with animals found harmful effects on unborn babies. It hasn’t been properly studied in humans. The benefits might outweigh the risks even if you’re pregnant. Talk with your doctor.

      See the FDA package insert
      BFDA pregnancy category (Probably safe)

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

      See the FDA package insert
      Alcohol
      No specific alcohol-related info.No specific alcohol-related info.
      Food
      No specific food-related info.No specific food-related info.
      Kidneys and liver
      • Okay to use even if you have liver or kidney problems, unlike most other blood sugar-lowering medicines.
      • Okay to use even if you have liver or kidney problems, unlike most other blood sugar-lowering medicines.
      Sex
      No specific sex-related info.No specific sex-related info.
      Sleep
      No specific sleep-related info.No specific sleep-related info.
      Weight
      • Likely to cause moderate weight gain (around 4 to 6 pounds).
      • Can cause weight gain and low blood sugar.
      • Likely to cause moderate weight gain (around 4 to 6 pounds).
      • Can cause weight gain and low blood sugar.
      Upsides and benefits
      LantusLevemir
      • Lantus is a long-lasting insulin that provides consistent, all-day sugar control with less risk of low blood sugar.
      • Insulin is the most effective blood sugar-lowering medicine. When used correctly, it'll lower blood sugar every time you use it and prevent the harmful effects of high sugar levels on your organs and blood vessels.
      • Dose can be easily adjusted to make a customized regimen that's tailored to your body.
      • Starting insulin early in the treatment of Type 2 diabetes can maintain your body's insulin-producing cells and slow down disease progression.
      • Okay to use even if you have liver or kidney problems, unlike most other blood sugar-lowering medicines.
      • Levemir is a long-lasting insulin that provides consistent, all-day sugar control with less risk of low blood sugar.
      • Insulin is the most effective blood sugar-lowering medicine. When used correctly, it'll lower blood sugar every time you use it and prevent the harmful effects of high sugar levels on your organs and blood vessels.
      • Dose can be easily adjusted to make a customized regimen that's tailored to your body.
      • Starting insulin early in the treatment of Type 2 diabetes can maintain your body's insulin-producing cells and slow down disease progression.
      • Okay to use even if you have liver or kidney problems, unlike most other blood sugar-lowering medicines.
      Downsides and risks
      LantusLevemir
      • You have to take insulin by injection.
      • You have to check your blood sugar every day.
      • Likely to cause moderate weight gain (around 4 to 6 pounds).
      • Higher risk of low blood sugar episodes than other kinds of diabetes medicines.
      • You have to take insulin by injection.
      • You have to check your blood sugar every day.
      • Likely to cause moderate weight gain (around 4 to 6 pounds).
      • Higher risk of low blood sugar episodes than other kinds of diabetes medicines.
      Tips from our pharmacists for people taking the medication
      LantusLevemir
      • Long-acting insulin good for baseline blood sugar control.
      • Works in 1 hour and lasts about 24 hours.
      • Can cause weight gain and low blood sugar.
      • Make sure you and your family know the symptoms of low blood sugar: sweating, shakiness, weakness, fast heartbeat, nervousness, headache, blurry vision, trouble thinking clearly, or passing out.
      • Always have a good source of sugar nearby for low blood sugar episodes.
      • Take it at the same time every day.
      • Make sure you understand how to give yourself the injections.
      • Don't shake the vial or mix with another insulin. Store unopened vials in the refrigerator. Opened vials are good at room temperature for 28 days.
      • Check your blood sugar levels every day.
      • Long-acting insulin good for baseline blood sugar control.
      • Works in 1 hour and lasts about 24 hours.
      • Can cause weight gain and low blood sugar.
      • Make sure you and your family know the symptoms of low blood sugar: sweating, shakiness, weakness, fast heartbeat, nervousness, headache, blurry vision, trouble thinking clearly, or passing out.
      • Always have a good source of sugar nearby for low blood sugar episodes.
      • Take it at the same time every day.
      • Make sure you understand how to give yourself the injections.
      • Don't shake the vial or mix with another insulin. Store unopened vials in the refrigerator. Opened vials are good at room temperature for 28 days.
      • Check your blood sugar levels every day.
      Learn more
      More about LantusSide effectsReviews & ratingsAlternativesFDA package insert
      More about LevemirSide effectsReviews & ratingsAlternativesFDA package insert