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Important Note

The following information is intended to supplement, not substitute for, the expertise and judgment of your physician, pharmacist or other healthcare professional. It should not be construed to indicate that use of the drug is safe, appropriate, or effective for you. Consult your healthcare professional before using this drug.





Ambenonium is used to treat muscle weakness due to muscle disease (myasthenia gravis).

How To Use

Take this medication by mouth as directed. The dosage is based on your medical condition and response to therapy. Use this medication exactly as prescribed. The incorrect use of this medication can lead to serious side effects. Do not exceed the prescribed dose, unless told to do so by your doctor. Learn all instructions for proper use of this medication and management of your condition, including how to use atropine or change your drug dosage, if necessary. Consult your doctor or pharmacist.

Side Effects

Nausea may occur. If this effect persists or worsens, notify your doctor promptly. Tell your doctor immediately if any of these serious side effects occur: headache, diarrhea, stomach pain, increased saliva, increased sweating, urinary urgency, eye changes (pinpoint pupils or increased tears). Tell your doctor immediately if any of these unlikely, but serious side effects occur: unusually slow pulse, trouble breathing, trouble swallowing, vision changes, muscle cramps or spasms, muscle weakness, dizziness. Tell your doctor immediately if any of these highly unlikely, but very serious side effects occur: chest pain, loss of coordination, seizures, mental/mood changes. If you notice any other effects not listed above, contact your doctor or pharmacist.


Tell your doctor your medical history, especially of: seizures, lung problems (e.g., asthma), nerve problems (e.g., vagotonia), stomach/intestinal problems (e.g., ulcers, obstruction, megacolon), heart problems (e.g., bradycardia, arrhythmia, coronary occlusion), thyroid problems (e.g., hyperthyroid), urinary problems (e.g., ureter or bladder obstruction), any allergies. Use this medication with caution because serious side effects can occur quickly. Notify your doctor promptly if you begin to experience any side effects (listed in SIDE EFFECTS section). Use with caution in the elderly, as they may be more sensitive to the effects of this medication (e.g., weakness, diarrhea, stomach pain). This medication should be used only when clearly needed during pregnancy. Discuss the risks and benefits with your doctor. It is not known whether this drug is excreted into breast milk. Consult your doctor before breast-feeding.

Drug Interactions

Tell your doctor of all prescription and nonprescription medication you may use, especially: mecamylamine, atropine, aminoglycoside antibiotics (e.g., neomycin, gentamicin, tobramycin), local or general anesthetics (e.g., lidocaine), heart rhythm drugs (e.g., quinidine), corticosteroids (e.g., prednisone), cholinergic drugs (e.g., bethanecol), muscle relaxants (e.g., baclofen), magnesium supplements, dexpanthenol. Do not start or stop any medicine without doctor or pharmacist approval.


If overdose is suspected, contact your local poison control center or emergency room immediately. Symptoms of overdose may include: severe breathing trouble, seizures.


Do not share this medication with others.

Missed Dose

If you miss a dose, use it as soon as you remember. If it is near the time of the next dose, skip the missed dose and resume your usual dosing schedule. Do not double the dose to catch up.


Store at room temperature between 59 and 86 degrees F (15 to 30 degrees C) away from light and moisture.

Medical Alert

Your condition can cause complications in a medical emergency. For enrollment information call MedicAlert at 1-800-854-1166 (USA), or 1-800-668-1507 (Canada).