Amondys 45

Last updated on RxList: 07/22/2021
Amondys 45 Patient Information Including Side Effects

Brand Names: Amondys 45

Generic Name: casimersen

What is casimersen (Amondys 45)?

Casimersen 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.

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

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

What are the possible side effects of casimersen (Amondys 45)?

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.

Call your doctor at once if you have:

  • pink, brown, or red urine;
  • foamy urine; or
  • swelling in your face, hands, feet, or stomach.

Common side effects 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.

What is the most important information I should know about casimersen (Amondys 45)?

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

Amondys 45 Patient Information including How Should I Take

What should I discuss with my healthcare provider before taking casimersen (Amondys 45)?

Tell your doctor if you have ever had kidney problems.

Tell your doctor if you are pregnant or breastfeeding.

How should I take casimersen (Amondys 45)?

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

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

This medicine 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.

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

Amondys 45 Patient Information including If I Miss a Dose

What happens if I miss a dose (Amondys 45)?

Call your doctor for instructions if you miss an appointment for your casimersen injection.

What happens if I overdose (Amondys 45)?

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

What should I avoid while taking casimersen (Amondys 45)?

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

What other drugs will affect casimersen (Amondys 45)?

Other drugs may affect casimersen, 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.

Where can I get more information (Amondys 45)?

Your pharmacist can provide more information about casimersen.


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.

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