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Generic Name: ambenonium (am ben OH nee um)
Brand Name: Mytelase Chloride

What is ambenonium?

Ambenonium affects chemicals in the body that are related to nerve impulses and muscle movement.

Ambenonium is used to treat symptoms of myasthenia gravis.

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

What is the most important information I should know about ambenonium?

You should not use this medicine if you are also being treated with atropine or meclamylamine.

What should I discuss with my health care provider before taking ambenonium?

You should not use ambenonium if you are allergic to it, or if you are also being treated with atropine or meclamylamine.

To make sure ambenonium is safe for you, tell your doctor if you have:

  • slow heartbeats;

  • asthma;

  • Parkinson's disease; or

  • a bladder or bowel obstruction.

It is not known whether ambenonium will harm an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant.

It is not known whether ambenonium passes into breast milk or if it could harm a nursing baby. You should not breast-feed while using this medicine.

How should I take ambenonium?

Follow all directions on your prescription label. Your doctor may occasionally change your dose to make sure you get the best results. Do not take this medicine in larger or smaller amounts or for longer than recommended.

Ambenonium is usually taken every 3 to 4 hours during the day. Follow your doctor's dosing instructions very carefully.

You may be asked to keep a daily record of when you took each dose and how long the effects lasted. This will help your doctor determine if your dose needs to be adjusted.

Store at room temperature away from moisture, heat, and light. Keep the bottle tightly closed when not in use.

What happens if I miss a dose?

Take the missed dose as soon as you remember. Skip the missed dose if it is almost time for your next scheduled dose. Do not take extra medicine to make up the missed dose.

What happens if I overdose?

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222. An overdose of ambenonium can develop quickly with very little warning.

Overdose symptoms may include increased salivation, pale skin, cold sweat, blurred vision, stomach cramps that continue to get worse, diarrhea, vomiting, urinating more than usual, muscle contractions, and loss of movement in any part of your body.

What should I avoid while taking ambenonium?

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

Ambenonium side effects

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

Call your doctor at once if you have:

  • severe stomach pain, severe diarrhea;

  • a frequent and urgent need to urinate;

  • watery eyes, drooling;

  • muscle cramps or twitching;

  • severe dizziness, spinning sensation; or

  • problems with tongue movement, trouble swallowing.

Common side effects may include:

  • increased sweating;

  • uncontrolled muscle movements;

  • increased urination;

  • nausea, diarrhea; or

  • blurred vision.

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 other drugs will affect ambenonium?

Many drugs can interact with ambenonium, and some drugs should not be used together. This includes prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible interactions are listed in this medication guide. Tell your doctor about all medicines you use, and those you start or stop using during your treatment with ambenonium. Give a list of all your medicines to any healthcare provider who treats you.

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.