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Amondys 45

Generic name: casimersenKAS-i-MER-sen ]
Drug class: Miscellaneous uncategorized agents

Medically reviewed by on Feb 26, 2024. Written by Cerner Multum.

What is Amondys 45?

Amondys 45 is used to treat Duchenne muscular dystrophy in adults and children who have a certain gene mutation. Your doctor will test you for this gene mutation.

Amondys 45 was approved by the US Food and Drug Administration (FDA) on an "accelerated" basis. In clinical studies, some people responded to Amondys 45, but further studies are needed.

Amondys 45 may also be used for purposes not listed in this medication guide.

Amondys 45 side effects

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

Amondys 45 may cause serious side effects. Call your doctor at once if you have:

Common side effects of Amondys 45 may include:

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.


Before using Amondys 45 tell your doctor about all your medical conditions or allergies, all medicines you use, and if you are pregnant or breastfeeding.

Before taking this medicine

Tell your doctor if you have ever had kidney problems.

Tell your doctor if you are pregnant or breastfeeding.

How should I take Amondys 45?

Your doctor will perform blood tests to make sure you do not have conditions that would prevent you from safely using Amondys 45.

Amondys 45 is given as an infusion into a vein, usually once per week. A healthcare provider will give you this injection.

Amondys 45 must be given slowly, and the infusion can take 35 to 60 minutes to complete.

Your kidney function may need to be checked while you are using this medicine.

Amondys 45 doses are based on weight. Your dose needs may change if you gain or lose weight.

What happens if I miss a dose?

Call your doctor for instructions if you miss an appointment for your Amondys 45.

What happens if I overdose?

Since Amondys 45 is given by a healthcare professional in a medical setting, an overdose is unlikely to occur.

What should I avoid while taking Amondys 45?

Follow your doctor's instructions about any restrictions on food, beverages, or activity.

What other drugs will affect Amondys 45?

Other drugs may affect Amondys 45, 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.

Popular FAQ

The new drugs approved by the FDA for the treatment of Duchenne Muscular Dystrophy (DMD) are Amondys 45, Viltepso, Vyondys 53, Exondys 51, Elevidys, Emflaza and Duvyzat. They include classes such as antisense oligonucleotides, a glucocorticoid, a gene therapy and a histone deacetylase (HDAC) inhibitor. Continue reading

Further information

Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.