What is Levemir FlexPen: Uses, Warnings & Interactions

Updated May 14, 2025  •  Published Jan 29, 2023

Levemir FlexPen overview

BRAND NAMES:

  • Levemir, Levemir FlexPen, Levemir FlexTouch

Generic Names:

  • Levemir Flextouch

Uses:

  • Treats diabetes.

Therapeutic Classes:

  • Antidiabetic

Forms:

  • Injectable

How it’s taken:

  • By injection

What is Levemir FlexPen used for?

What form(s) does Levemir FlexPen come in

  • Injectable

What are common Levemir FlexPen doses?

  • Pen 3ml of 100unit/ml

Common Levemir FlexPen prescriptions

  • Levemir FlexPen
    3ml of 100unit/ml pen

How to take Levemir FlexPen

  • Your healthcare provider will work with you to personalize your dose and treatment based on your insulin needs and lifestyle. You will be taught how to give yourself the injections. Make sure you understand all instructions. Ask the doctor, nurse, or pharmacist if you have questions.

  • Always double-check both the concentration (strength) of your insulin and your dose. Concentration and dose are not the same. The dose is how many units of insulin you will use. The concentration tells how many units of insulin are in each milliliter (mL), such as 100 units/mL (U-100), but this does not mean you will use 100 units at a time.

  • Read and follow the patient instructions that come with this medicine. Talk to your doctor or pharmacist if you have any questions.

  • If you use insulin once a day, it is best to use it at about the same time every day.

  • Opened medicine: Vials: Store in the refrigerator or at room temperature in a cool place, away from sunlight and heat. Use within 42 days.Pen: Store at room temperature, away from direct heat and light. Do not refrigerate. Do not store with the needle attached. Throw away any opened pen after 42 days.

  • Injection routeThrow away used needles in a hard, closed container that the needles cannot poke through. Keep this container away from children and pets.

  • Unopened medicine: Store the unopened vials or pens in the refrigerator. Protect from light. Do not freeze.If you cannot refrigerate your unopened medicine, you may store it at room temperature in a cool place away from direct heat and light for 42 days.

  • Do not mix this insulin with any other type of insulin. The insulin should be clear and colorless. Do not use it if it is cloudy or colored.

  • Check the label before use. Do not change the brand, type, or concentration unless your doctor tells you to. If you use a pump or other device, make sure the insulin is made for that device.

  • Injection routeUse a new needle and syringe each time you inject your medicine. If you use a syringe, use only the kind that is made for insulin injections. Some insulin must be given with a specific type of syringe or needle. Ask your pharmacist if you are not sure which one to use.

  • Injection routeYou will be shown the body areas where this shot can be given. Use a different body area each time you give yourself a shot. Keep track of where you give each shot to make sure you rotate body areas. Do not use the exact same spot for each injection.

What to do if you miss a dose of Levemir FlexPen

Levemir FlexPen contraindications

  • This medicine is not right for everyone. Do not use it if you had an allergic reaction to insulin detemir.

Levemir FlexPen warnings

  • Keep all medicine out of the reach of children. Never share your medicine with anyone.

  • This medicine may make you dizzy or drowsy. Do not drive or do anything else that could be dangerous until you know how this medicine affects you.

  • This medicine may cause the following problems:Low blood sugarFluid retention or heart failure (when used with thiazolidinedione [TZD] medicine)

  • Tell your doctor if you are pregnant or breastfeeding, or if you have kidney disease, liver disease, or heart failure.

  • Never share insulin pens or needles with anyone. Sharing these can pass hepatitis viruses, HIV, or other illnesses from one person to another.

Levemir FlexPen interactions

  • Keep all medicine out of the reach of children. Never share your medicine with anyone.

  • Never share insulin pens or needles with anyone. Sharing these can pass hepatitis viruses, HIV, or other illnesses from one person to another.

  • Do not drink alcohol while you are using this medicine.

  • Some medicines can change the amount of insulin you need to use and make it harder for you to control your diabetes. Tell your doctor about all other medicines that you are using.

Levemir FlexPen side effects

Serious Side Effects

  • Shaking, trembling, sweating, fast or pounding heartbeat, lightheadedness, hunger, confusion

  • Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing

  • Rapid weight gain, swelling in your hands, ankles, or feet, trouble breathing, tiredness

Less Serious Side Effects

  • Headache

  • Redness, itching, swelling, or skin changes where the shot was given

  • Stomach pain, nausea

  • Cough, runny or stuff nose, sore throat, body aches

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