Ambenonium (By mouth)


Ambenonium (am-ben-OH-nee-um)

Treats myasthenia gravis.

Brand Name(s)

Mytelase Chloride

There may be other brand names for this medicine.

When This Medicine Should Not Be Used

You should not use this medicine if you have had an allergic reaction to ambenonium. You should not use this medicine if you also use atropine or mecamylamine (Inversine®).

How to Use This Medicine


  • Your doctor will tell you how much of this medicine to use and how often. Your dose may need to be changed several times in order to find out what works best for you. Do not use more medicine or use it more often than your doctor tells you to.

If a dose is missed:

  • This medicine needs to be given on a fixed schedule. If you miss a dose or forget to use your medicine, call your doctor or pharmacist for instructions.

How to Store and Dispose of This Medicine

  • Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light.
  • Ask your pharmacist, doctor, or health caregiver about the best way to dispose of any outdated medicine or medicine no longer needed.
  • Keep all medicine away from children and never share your medicine with anyone.

Drugs and Foods to Avoid

Ask your doctor or pharmacist before using any other medicine, including over-the-counter medicines, vitamins, and herbal products.

  • Make sure your doctor knows if you are also using cevimeline (Evoxac®), donepezil (Aricept®), or galantamine (Reminyl®).
  • Make sure your doctor knows if you are also using neostigmine (Prostigmin®), nicotine gum (Nicorette®), or tacrine (Cognex®).

Warnings While Using This Medicine

  • Make sure your doctor knows if you are pregnant or breast feeding.
  • Make sure your doctor knows if you have asthma or an intestinal obstruction (a blocked digestive tube). Tell your doctor about problems with urination (passing urine). Let your doctor know if you have Parkinson's disease.

Possible Side Effects While Using This Medicine

Call your doctor right away if you notice any of these side effects:

  • Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing
  • Anxiety or dizziness.
  • Blurred vision or fainting.
  • Increase in how much or how often you urinate.
  • Increased sweating.
  • Muscle cramps.
  • Pale, clammy skin.
  • Slow heartbeat.
  • Stomach cramps, diarrhea, nausea, or severe vomiting.
  • Trouble swallowing.

If you notice these less serious side effects, talk with your doctor:

  • Diarrhea, mild nausea, or vomiting.
  • Increased watering of your eyes or mouth.
  • Weakness, feeling tired, or body pains.

If you notice other side effects that you think are caused by this medicine, tell your doctor

Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088

Version Info

  • Last Reviewed on 06/12/2013

A.D.A.M., Inc. is accredited by URAC, also known as the American Accreditation HealthCare Commission ( URAC's accreditation program is an independent audit to verify that A.D.A.M. follows rigorous standards of quality and accountability. A.D.A.M. is among the first to achieve this important distinction for online health information and services. Learn more about A.D.A.M.'s editorial policy, editorial process and privacy policy. A.D.A.M. is also a founding member of Hi-Ethics and subscribes to the principles of the Health on the Net Foundation (

The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- 2013 A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.