Levemir (Insulin Detemir) – Subcutaneous

What Is Levemir?

Levemir (insulin detemir) is a long-acting human insulin injection prescribed to improve glycemic control (maintaining blood sugar levels) in people with diabetes mellitus. The medication often is prescribed to older adults since it results in fewer low blood sugar side effects than other insulin regimens.

Insulin is a hormone created by your pancreas. It controls the amount of glucose (the body's main source of energy) in your bloodstream. Insulins, such as insulin detemir, work by binding to insulin receptors. Receptor-bound insulin lowers blood glucose by creating uptake of glucose into skeletal muscle and fat and by inhibiting the output of glucose from the liver.

It's also important to understand that in the case of Levemir, long-acting human insulin is defined as insulin made by the body that controls blood sugar consistently for an entire day or more and can be used in people with type 1 or type 2 diabetes.

Levemir is a prescription medication that comes in a liquid solution to inject into fatty tissue under the skin (subcutaneously).

Drug Facts

Generic Name: Insulin detemir 

Brand Name: Levemir

Drug Availability: Prescription

Therapeutic Classification: Antidiabetic

Available Generically: Yes

Controlled Substance: No

Administration Route: Subcutaneous 

Active Ingredient: Insulin detemir recombinant 

Dosage: Injectable liquid

What Is Levemir Used For?

Levemir is used to control the blood sugar levels of adults and children with diabetes.

There are various forms of diabetes, but the most common are type 1 diabetes and type 2 diabetes. Type 1 diabetes is when your pancreas does not make or nearly stops making insulin. Type 2 diabetes occurs when your body does not properly use the insulin it does make and can even stop making insulin.

Type 2 diabetes also is considered a form of non-insulin-dependent diabetes. This is more common in adults than is type 1 diabetes, which develops earlier in life in most people. Insulin therapy is recommended for people with type 1 diabetes because people with the disease are incapable of making their own insulin to assist in lowering their blood sugar.

An illustration with information about Levemir (insulin detemir)

Illustration by Zoe Hansen for Verywell Health

How to Take Levemir

Levemir is taken subcutaneously as an injection medication for people with insulin deficiency or little to no insulin in their body. If you are taking this medication once daily, you should take it in the evening with your last meal of the day, or at bedtime. For people taking this medication twice daily, you can take your second dose at night with your last meal, at bedtime, or 12 hours from your first dose.

It is important to take this medication while measuring your blood sugar levels before taking another dose. Taking too much Levemir generally is more harmful than beneficial. It is best to use this injectable medication near a more fatty tissue area.

Common areas to inject insulin are:

  • The outer part of the upper arm
  • The lower middle part of the abdomen 
  • The front of the thigh
  • The upper part of the buttocks


Store unopened insulin Levemir vials and pens in the original carton in the refrigerator at 36-46 degrees F. This medication should not be stored in the freezer or directly placed next to the refrigerator cooling element.

Levemir should not be frozen, do not use Levemir if it has been frozen. The unopened insulin can be used until the medication expiration date on the packaging if it has been properly stored in the refrigerator.

Levemir should be kept in its original container so that it stays clean and protected from light. If there is no refrigeration available, this insulin can be kept unrefrigerated at room temperature or below 86 degrees as long as it is kept cool for as long as possible and away from any heat or light sources.

The unrefrigerated product should be thrown away 42 days after it was first removed from the refrigerator. Do not store insulin medications in direct sunlight or in a hot vehicle. These medications need to be stored in a cooler, but not directly placed on ice or a gel pack.

Off-Label Uses

There are limited off-label uses that have been further studied for recommended use other than lowering high blood sugar levels. Please speak with your healthcare provider to make sure that you are using Levemir for lowering your blood sugar levels.

How Long Does Levemir Take to Work?

Levemir can start working in your body within three to four hours after the injection and consequently balances your sugar levels over a 24-hour period.

What Are the Side Effects of Levemir?

This is not a complete list of side effects and others may occur. A medical professional can advise you on side effects. If you experience other effects, contact your pharmacist or a medical professional. You may report side effects to the Food and Drug Administration (FDA) at www.fda.gov/medwatch or 800-FDA-1088.

As with all medications, Levemir can cause side effects. Tell your healthcare provider about any side effects you experience while taking this medication.

Common Side Effects

A low blood sugar level (hypoglycemia) is the most common side effect of insulin therapy and carries life-threatening consequences.

An injection site reaction is a common complaint with insulin therapy. It may be avoided by changing your injection site after each injection.

Other side effects include:

You may not experience all of these side effects. If you have questions about side effects, contact your healthcare provider.

Serious Side Effects

Serious adverse events may occur with Levemir use that may require immediate medical care.  

Although severe side effects are rare with Levemir, get immediate medical attention if you experience a severe reaction to this drug. 

This includes:

  • Extremely low blood sugar levels (e.g., sweating, nausea, dizziness)
  • Severe allergic reaction: Whole-body reaction including sudden outbursts of itching, rash, shallow breathing, rapid heartbeat (tachycardia), and heavy sweating (hyperhidrosis).
  • Excess fluid that causes parts of the body to swell (edema).
  • Heart failure is commonly associated when taking an additional diabetes medication such as Actos (pioglitazone) or Avandia (rosiglitazone) along with Levemir. 

If you notice any unusual swelling in your feet, ankles, or the lower parts of your legs and have shortness of breath, contact your medical provider right away.

Long-Term Side Effects

Long-term use of Levemir can cause lipodystrophy at the site of repeated insulin injections. Lipodystrophy includes lipohypertrophy (thickening of adipose tissue) and lipoatrophy (thinning of adipose tissue) and may affect insulin absorption.

Report Side Effects

Levemir may cause other side effects. Call your healthcare provider if you have any unusual problems while taking this medication.

If you experience a serious side effect, you or your provider may send a report to the FDA's MedWatch Adverse Event Reporting Program or by phone (800-332-1088).

Dosage: How Much Levemir Should I Take?

Drug Content Provided and Reviewed by IBM Micromedex®

The dose of this medicine will be different for different patients. Follow your doctor's orders or the directions on the label. The following information includes only the average doses of this medicine. If your dose is different, do not change it unless your doctor tells you to do so.

The amount of medicine that you take depends on the strength of the medicine. Also, the number of doses you take each day, the time allowed between doses, and the length of time you take the medicine depend on the medical problem for which you are using the medicine.

  • For injection dosage form:
    • For type 1 diabetes:
      • Adults and children 2 years of age and older—Dose is based on your blood sugar and must be determined by your doctor.
      • Children younger than 2 years of age—Use and dose must be determined by your doctor.
    • For type 2 diabetes:
      • Adults—Dose is based on your blood sugar and must be determined by your doctor.
      • Children—Use and dose must be determined by your doctor.


The following modifications (changes) should be kept in mind when using Levemir:

Severe allergic reaction: Avoid using Levemir if you have a known allergy to it or any of its ingredients. Ask your pharmacist or healthcare provider for a complete list of the ingredients if you're unsure.

Pregnancy: ​​Levemir can be used in pregnant individuals as the benefits outweigh the risks in terms of harm to the fetus. However, high blood sugar during pregnancy can be harmful to both the birthing person and the baby as it can lead to preterm delivery or other pregnancy problems. If you are pregnant or plan to become pregnant, consult with a healthcare professional before starting Levemir.

Breastfeeding: Caution is recommended with breastfeeding as there are limited data available on its effects. Talk with your healthcare provider if you plan on breastfeeding. A provider will help you weigh the benefits and risks of taking Levemir while nursing and offer alternatives to feeding your baby.

Adults over age 65: For older individuals with high blood sugar, the initial dose, dose change, and maintenance dose should be conservative to avoid low blood sugar, which can be difficult to recognize in the older population.  

Children: Dosing requirements for children 2 years of age and adolescents needs to be adjusted by weight. Moreover, their healthcare provider needs to give an additional rapid-acting or short-acting insulin shot to complete the balance of daily insulin required for children with high blood sugar (type 1 diabetes). 

The healthcare provider may need to adjust the dose depending on the child’s response to the medication. In addition, if medication is taken once a day, it should be take with the evening meal or at bedtime.

People who smoke: Smoking can lower Levemir’s effectiveness. Try to stop smoking before starting Levemir, and avoid smoking while taking Levemir. Your healthcare provider can help you with this goal.

Missed Dose

If you miss your dose or do not take enough of your required dose, you may have high blood sugar levels (hyperglycemia). It is best to take the missed dose as soon as you remember and adjust your second dose accordingly.

Be on the lookout for symptoms associated with high blood sugar, which may include:

Never take two doses at the same time. If you forget whether you already took your dose, the best course of action would be to measure your blood glucose at home with your self-monitoring blood sugar meter. Test yourself before you eat and after your meal. This way you will get an accurate blood sugar reading, which may indicate the need for medication.

Taking an extra dose of too much insulin can cause low blood sugar to perform daily activities and cause more harm than benefit.

Overdose: What Happens If I Take Too Much Levemir

If you take too much Levemir, your blood sugar may fall too low. This can cause low blood sugar, which can be very harmful. It is recommended to not take more Levemir than directed by your healthcare provider.

You can treat low blood sugar levels by drinking or eating something sugary right away, including:

  • A cup (8 ounces) of milk
  • Three or four pieces of hard candy
  • Half a cup (4 ounces) of fruit juice, such as orange juice
  • Half a cup of non-diet soda
  • Three or four glucose tablets
  • A tablespoon of sugar or honey

If you feel dizzy or are on the verge of passing out, sit or lie down. From there, seek help immediately from a healthcare provider. If there are no sugar products available for you to ingest after taking more units of insulin than what was prescribed originally.

What Happens If I Overdose on Levemir?

If you think you or someone else may have overdosed on Levemir, call a healthcare provider or the Poison Control Center (800-222-1222).

If someone collapses or isn't breathing after taking Levemir, call 911 immediately.


Drug Content Provided and Reviewed by IBM Micromedex®

Never share insulin pens or cartridges with others under any circumstances. It is not safe for one pen to be used for more than one person. Sharing needles or pens can result in transmission of hepatitis viruses, HIV, or other bloodborne illnesses.

It is very important that your doctor will want to check your progress at regular visits, to make sure that this medicine is working properly. Blood and urine tests will be needed to check unwanted effects.

It is very important to follow carefully any instructions from your health care team about:

  • Alcohol—Drinking alcohol may increase or decrease your blood sugar. Discuss this with your health care team.
  • Other medicines—Do not take other medicines during the time you are taking insulin detemir unless they have been discussed with your doctor. This especially includes nonprescription medicines such as aspirin, and medicines for appetite control, asthma, colds, cough, hay fever, or sinus problems.
  • Counseling—Other family members need to learn how to prevent side effects or help with side effects if they occur. Also, patients with diabetes may need special counseling about diabetes medicine dosing changes that might occur because of lifestyle changes, such as changes in exercise and diet. Furthermore, counseling on contraception and pregnancy is needed because of the problems that can occur in patients with diabetes during pregnancy.
  • Travel—Keep a recent prescription and your medical history with you. Be prepared for an emergency as you would normally. Make allowances for changing time zones and keep your meal times as close as possible to your usual meal times.

In case of emergency: There may be a time when you need emergency help for a problem caused by your diabetes. You need to be prepared for these emergencies. It is a good idea to:

  • Wear a medical identification (ID) bracelet or neck chain at all times. Also, carry an ID card in your wallet or purse that says that you have diabetes and a list of all of your medicines.
  • Keep an extra supply of insulin detemir and syringes with needles or injection devices on hand in case high blood sugar occurs.
  • Keep some kind of quick-acting sugar handy to treat low blood sugar.
  • Have a glucagon kit and a syringe and needle available in case severe low blood sugar occurs. Check and replace any expired kits regularly.

This medicine may cause serious allergic reactions, including anaphylaxis, which can be life-threatening and require immediate medical attention. Call your doctor right away if you have a rash, itching, swelling of the face, tongue, and throat, trouble with breathing, or chest pain after you receive the medicine.

You may have some skin redness, rash, itching, or swelling at the injection site. If this irritation is severe or does not go away, call your doctor. Do not inject insulin detemir into a skin area that is red, swollen, or itchy.

Using this medicine together with other diabetes medicine (eg, pioglitazone, rosiglitazone, Actos®, Actoplus Met®, Avandia®) may cause serious heart problem or edema (fluid retention). Check with your doctor immediately if you are rapidly gaining weight, having chest pain or discomfort, extreme tiredness or weakness, trouble breathing, uneven heartbeat, or excessive swelling of the hands, wrist, ankles, or feet.

Too much insulin detemir can cause hypoglycemia (low blood sugar). Low blood sugar also can occur if you use insulin detemir with another antidiabetic medicine, changes in insulin regimen (eg, insulin strength, type of insulin, injection site), delay or miss a meal or snack, exercise more than usual, or drink alcohol. Low blood sugar must be treated before it causes you to pass out (unconsciousness). People feel different symptoms of low blood sugar. It is important that you learn which symptoms of low blood sugar you usually have so that you can treat it quickly.

  • Symptoms of low blood sugar include anxiety, behavior change similar to being drunk, blurred vision, cold sweats, confusion, cool, pale skin, difficulty with thinking, drowsiness, excessive hunger, fast heartbeat, headache (continuing), nausea, nervousness, nightmares, restless sleep, shakiness, slurred speech, or unusual tiredness or weakness.
  • If symptoms of low blood sugar occur, eat glucose tablets or gel, corn syrup, honey, or sugar cubes, or drink fruit juice, non-diet soft drink, or sugar dissolved in water to relieve the symptoms. Also, check your blood for low blood sugar. Glucagon is used in emergency situations when severe symptoms including seizures or unconsciousness occur. Have a glucagon kit available, along with a syringe and needle, and know how to use it. Members of your family should also know how to use it.

This medicine may make you dizzy or drowsy. Make sure you know how you react to this medicine before you drive, use machines, or do other jobs that require you to be alert. .

Hyperglycemia (high blood sugar) may occur if you do not take enough or skip a dose of your antidiabetic medicine, changes in insulin regimen, overeat or do not follow your meal plan, have emotional stress or infection, or do not exercise as much as usual.

  • Symptoms of high blood sugar include blurred vision, drowsiness, dry mouth, flushed, dry skin, fruit-like breath odor, increased urination (frequency and amount), ketones in the urine, loss of appetite, stomachache, nausea, or vomiting, tiredness, trouble breathing (rapid and deep), unconsciousness, or unusual thirst.
  • If symptoms of high blood sugar occur, check your blood sugar level and then call your doctor for instructions.

This medicine may cause hypokalemia (low levels of potassium in your blood). Do not use medicines, supplements, or salt substitutes that contain potassium unless you have discussed this with your doctor.

Do not take other medicines unless they have been discussed with your doctor. This includes prescription or nonprescription (over-the-counter [OTC]) medicines and herbal or vitamin supplements.

What Are Reasons I Shouldn't Take Levemir?

Levemir is not appropriate for everyone. You should not take this medication if you are allergic to insulin detemir or any of the inactive ingredients in Levemir.

Levemir may be used with caution in some people only if the healthcare provider determines it is safe. Users should be aware of the following occasions when the drug is discouraged:

  • Levemir is not recommended for treating diabetic ketoacidosis because of its long-acting nature (taking a long time to work).
  • Avoid Levemir during episodes of hypoglycemia.

What Other Medications May Interact With Levemir?

Some medications may affect insulin levels and potentially increase or decrease your blood sugar levels. The blood sugar levels in your body will require insulin dose adjustments and close monitoring so that your healthcare provider can adjust them accordingly. 

Always consult with your healthcare provider or pharmacist to discuss the proper dose of your Levemir when taking these medications.

Drugs that may increase your risk of low blood sugar include:

There may be a decrease in your Levemir dose if you are taking the above medications. Frequent monitoring of your blood sugar levels by your healthcare provider may be required if you take these types of medications with Levemir.

Drugs that can increase your glucose levels:

Your provider may also increase your dose and the frequency of your blood sugar monitoring. Drinking alcohol can either reduce or increase the blood sugar lowering effects of Levemir.

What Medications Are Similar?

There are various types of insulin. As such, some insulin medications are short-acting and work more quickly in the body than Levemir. 

The following medications work similarly as Levemir:




  • Novolin N (isophane insulin)


This is a list of drugs also used for blood sugar management. It is not a list of drugs recommended to take with Levemir. Discuss any questions or concerns with your pharmacist or a healthcare provider.

Frequently Asked Questions

  • What is Levemir used for?

    Levemir is used for treating high blood sugar and may be prescribed for use one or two times throughout the day to control your blood sugar levels. It is primarily used to maintain a healthy glucose level in the body in order to protect your organs from damage.

  • How does Levemir work?

    Levemir’s primary activity is lowering the blood sugar in the body. It binds to insulin protein receptors, which help your skeletal muscle and fat tissue to burn more sugar and stop your liver from making more sugar.

  • What drugs should not be taken with Levemir?

    Unless you are directed by your healthcare provider to take additional diabetes medication, you should not take any medications that can reduce your blood sugar such as another insulin medication. Hypoglycemia (low sugar levels) can be more harmful than high blood sugar levels.

  • How long does it take for Levemir to work?

    Levemir is a long-acting human insulin analog that can be taken once every 24 hours. Because it is a long-acting insulin, it may take a few hours before you see the full benefits of this medication. It can take three to four hours or even up to 14 hours for Levemir to exert 50% of its maximum effect after dose administration.

  • How to stop taking Levemir?

    You should never stop taking Levemir unless instructed by a medical provider. Your healthcare provider may reduce or stop your Levemir if your high blood sugar is controlled and you no longer need the medication. Try to incorporate diet and exercise into your new routine. 

How Can I Stay Healthy While Taking Levemir?

Diet and exercise are key to controlling high blood sugar. You can expect a better outcome from your medication if you stick with an exercise routine and continue eating a low-sugar diet. Avoiding alcohol would also improve your health while taking Levemir as alcohol can affect your blood sugar levels.

Medical Disclaimer

Verywell Health's drug information is meant for educational purposes only and is not intended to replace medical advice, diagnosis, or treatment from a healthcare provider. Consult your healthcare provider before taking any new medication(s). IBM Watson Micromedex provides some of the drug content, as indicated on the page.

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Verywell Health uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy.
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  5. MedlinePlus. Insulin detemir (rDNA origin) injection.

  6. Demssie YN, Younis N, Soran H. The role of insulin detemir in overweight type 2 diabetes management. Vasc Health Risk Manag. 2009;5(3):553-560. doi:10.2147/vhrm.s4326

  7. Prescribers’ Digital Reference. Levemir (insulin detemir (rDNA origin)).

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