Prescription Drug Coverage

Isosorbide Mononitrate ER (Imdur) Medicare Coverage

You may be able to find Medicare plan options in your area that cover Isosorbide Mononitrate ER or Imdur. Learn more about Isosorbide Mononitrate ER and find Medicare Advantage plans in your area that cover other prescription drugs.
Isosorbide Mononitrate ER
Chemical name: Isosorbide Mononitrate ER

Brand name: Imdur

Typical dosage: 30mg

Typical type: Tablet1

Isosorbide Mononitrate ER is a medication used to treat chest pain. It’s available as a generic or as a brand name drug and comes as an oral tablet.

Isosorbide Mononitrate ER is used to treat chest pain related to angina. The brand name equivalent of Isosorbide Mononitrate ER is called Imdur.

Isosorbide Mononitrate ER is typically taken once daily to improve blood flow to the heart and help relax the heart muscles to treat chest pain symptoms.

Common side effects related to Isosorbide Mononitrate ER include dizziness and headaches.

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Does Medicare cover Isosorbide Mononitrate ER or Imdur?

Yes! 100% of Medicare Advantage plans and Medicare Part D plans cover Isosorbide Mononitrate ER.1

  • Medicare Advantage plans that offer prescription drug coverage are called Medicare Advantage Prescription Drug Plans (MA-PD). Most Medicare Advantage beneficiaries (88 percent) are enrolled in MA-PDs.2

  • Medicare prescription drugs plans each have their own formulary, or drug list, that details what prescription drugs are covered by the plan and how they are covered.

Drug coverage may vary based on plan availability. You may be able to find Medicare Advantage plan options in your area that cover Isosorbide Mononitrate ER.

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You can also compare Part D prescription drug plans available where you live and enroll in a Medicare prescription drug plan online when you visit

Average costs for Isosorbide Mononitrate ER with Medicare drug coverage1

Your copay and deductible costs for any prescription drug can vary depending on what coverage stage you’re in.

Deductible stage Typical copay stage
Your deductible is the amount of money you must spend on covered drugs before your Medicare drug coverage starts paying its share of costs.

In the deductible stage, you’re responsible for the full cost of your prescription drugs.

Some Medicare prescription drug plans have a $0 deductible. Medicare drug plans cannot have a deductible more than $480 in 2022.
After you meet your Part D deductible, you enter the initial coverage period.

During this phase (the typical copay stage), you pay a copayment (flat fee) or coinsurance (percentage) for your covered medications.
$1– $20 Free – $20

Additional information

Isosorbide Mononitrate ER should be taken in the morning when you first wake up.

Isosorbide is usually well tolerated. Headaches are common when first starting this medication, but they usually go away with time.

Call your doctor if you experience extreme dizziness, fainting or a noticeably fast or slow heartbeat. Get medical help right away if you experience chest pain or pressure that is new or worse.

Do not take Isosorbide Mononitrate ER with PDE-5 inhibitor drugs including Sildenafil, Tadalafil or Vardenafil. You should also avoid taking this medication with Riociguat.



This article is for informational purposes only. It is not healthcare advice, treatment, or diagnosis. It is not an endorsement of or recommendation for this medication. Speak to your doctor or healthcare provider about your specific healthcare needs, including your prescription medications. Only take medication as directed by your doctor.

Coverage and costs of prescription medications will vary by Medicare plan. Not all plans are available in all areas.


Written by Hayden Gharibyar, Pharm.D.