Erenumab is used to prevent migraine headaches in adults.

Erenumab may also be used for purposes not listed in this medication guide.

Use only as directed. Tell your doctor if you use other medicines or have other medical conditions or allergies.

Follow all directions on your prescription label and read all medication guides or instruction sheets. Use the medicine exactly as directed.

Erenumab is injected under the skin, usually once per month. A healthcare provider may teach you how to properly use the medication by yourself.

Read and carefully follow any Instructions for Use provided with your medicine. Ask your doctor or pharmacist if you don't understand all instructions.

Prepare your injection only when you are ready to give it. Do not use if the medicine has changed colors or has particles in it. Call your pharmacist for new medicine.

Each prefilled syringe or autoinjector is for one use only. Throw it away after one use, even if there is still medicine left inside.

Do not shake the syringe or autoinjector or you may ruin the medicine.

Your dose needs may change if you switch to a different brand, strength, or form of this medicine. Avoid medication errors by using only the form and strength your doctor prescribes.

Store erenumab in its original carton in the refrigerator, away from heat and light. Do not freeze.

Take the medicine out of the refrigerator and let it reach room temperature for 30 minutes before injecting your dose. Protect from sunlight. Do not heat the medicine in hot water or in a microwave.

You may store the medicine for up to 7 days at room temperature.

Use a needle and syringe only once and then place them in a puncture-proof "sharps" container. Follow state or local laws about how to dispose of this container. Keep it out of the reach of children and pets.

Usual Adult Dose for Migraine Prophylaxis:

70 mg subcutaneously once a month
-Some patients may benefit from 140 mg subcutaneously once a month

Use: For the preventative treatment of migraine.

You should not use erenumab if you are allergic to it.

Tell your doctor if you are pregnant or plan to become pregnant. It is not known whether erenumab will harm an unborn baby. However, having migraine headaches during pregnancy may cause complications such as preeclampsia (dangerously high blood pressure that can lead to medical problems in both mother and baby). The benefit of preventing migraines may outweigh any risks to the baby.

Ask a doctor if it is safe to breastfeed while using erenumab.

Use the medicine as soon as you remember, and then go back to your regular injection schedule. Do not use two doses at one time.

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.

Avoid injecting erenumab into skin that is red, bruised, tender, or hard.

Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Erenumab may cause serious side effects. Call your doctor at once if you have:

• severe constipation or constipation with symptoms such as severe stomach pain, vomiting, swelling of stomach or bloating; or

• severe headache, blurred vision, pounding in your neck or ears.

Common side effects of erenumab may include:

• constipation; or

• pain, swelling, or redness where the medicine was injected.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Other drugs may affect erenumab, including prescription and over-the-counter medicines, vitamins, and herbal products. Tell your doctor about all your current medicines and any medicine you start or stop using.