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Mytelase Patient Information Including Side Effects

Brand Names: Mytelase Chloride

Generic Name: ambenonium (Pronunciation: am ben OH nee um)

What is ambenonium (Mytelase)?

Ambenonium affects chemicals in the body that are involved in the communication between nerve impulses and muscle movement.

Ambenonium is used to treat the symptoms of myasthenia gravis.

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

What are the possible side effects of ambenonium (Mytelase)?

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

Call your doctor at once if you have a serious side effect such as:

  • severe diarrhea;
  • muscle twitching; or
  • cough with sputum (mucus).

Less serious side effects may include:

  • sweating or urinating more than usual;
  • drooling, watery eyes;
  • warmth or tingly feeling;
  • nausea, vomiting, stomach pain;
  • blurred vision;
  • anxiety;
  • dizziness, spinning feeling; or
  • muscle cramps.

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.

Read the Mytelase (ambenoium chloride) Side Effects Center for a complete guide to possible side effects

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

You should not use this medication if you are allergic to ambenonium, or if you are using certain medications.

Be sure your doctor knows if you use: mecamylamine, (Inversine), atropine (Atreza, Donnatal, Sal-Tropine, Lomotil, Lomocot, and others), blood pressure medications, or a diuretic (water pill).

Before using ambenonium, tell your doctor if you have asthma, Parkinson's disease, or a bladder or bowel obstruction.

Your doctor may occasionally change your dose to make sure you get the best results. 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.

Side Effects Centers

Report Problems to the Food and Drug Administration


You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

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