Aimovig is a brand-name prescription medication known as a biologic. Its active ingredient is erenumab-aooe. Generic versions of biologic medications are called biosimilars. Due to complex manufacturing processes, biosimilar medications are very similar to the original biologic version, but they’re not identical.

There is no biosimilar version of this medication, so only the brand-name version is currently available.

Aimovig (erenumab-aooe) is an injection below the skin that you administer yourself at home. Because of this, Medicare Part D prescription drug plans would cover eligible costs.

Private insurance companies administer Part D plans on Medicare’s behalf, so drug costs and drug availability can vary by plan type and plan provider.

If you have migraine, a doctor or healthcare professional may prescribe Aimovig (erenumab-aooe), and when medically necessary, Medicare may cover some or all of the costs.

Part D drug plans have three coverage stages, including the:

  • deductible stage
  • initial coverage stage
  • catastrophic coverage stage

The deductible stage

Not all Part D prescription drug plans have a deductible, but if yours does, you will join at this stage.

Once you have paid the plan’s deductible in full, it will begin paying its share of eligible costs.

Initial coverage stage

During this stage, you’ll pay a 25% coinsurance toward the cost of Aimovig (erenumab-aooe).

In 2025, you will continue paying the 25% coinsurance until you’ve paid a total of $2,000. In 2026, this is expected to increase to $2,100.

Catastrophic coverage stage

During this stage, you will pay no further costs toward your prescription medications for the remaining calendar year.

You will receive an explanation of benefits (EOB) the month after your pharmacy bills your plan provider. The EOB will detail the following:

  • The prescriptions you’ve filled.
  • The total amount the plan has paid.
  • The total amount you’ve paid.
  • The amount others have paid, such as another insurer (if applicable).
  • Which coverage stage are you at?
  • What the plan has counted toward your total out-of-pocket expenses.
  • The total amount the pharmacy has charged for your medications.

Aimovig (erenumab-aooe) can help prevent migraine episodes that happen when you experience migraine symptoms. Migraine causes a severe headache along with other symptoms that may include nausea, vomiting, difficulties with speech, or visual disturbances.

Aimovig (erenumab-aooe) works by blocking the activity of calcitonin gene-related peptide (CGRP), which is a protein that can cause migraine episodes. By blocking CGRP, Aimovig can help prevent migraine episodes.

Aimovig is not currently approved by the Food and Drug Administration (FDA) for treating cluster headaches or vestibular migraine. However, a doctor or another prescribing healthcare professional may prescribe it off-label, which is the term for when a medication is prescribed for a condition other than what the FDA has approved it for.

Aimovig (erenumab-aooe) comes in prefilled syringes and auto-injector pens. You will give yourself the injection under your skin in your upper arm, abdomen, or thigh.

You will typically give yourself the injection once per month, on the same day.

Your prescribing doctor or another healthcare professional will show you how to administer Aimovig (erenumab-aooe) injections. You can also watch a step-by-step instruction video on the drug manufacturer’s website.