OpenClaim

Ambenonium Side Effects

The most commonly reported side effects of ambenonium include myasthenia gravis, diarrhoea, and myasthenia gravis, based on 246 FDA adverse event reports from 2004 to 2025. 6.9% of reports found the drug to be ineffective.

Ambenonium side effects

Percentages show how often each reaction appears relative to total reports for ambenonium.

1
Myasthenia Gravis9.8%24
2
Drug Ineffective6.9%17
3
Diarrhoea6.5%16
4
Myasthenia Gravis3.7%9
5
Drug Exposure During Pregnancy3.3%8
6
Dysphagia3.3%8
7
Muscular Weakness3.3%8
8
Acute Kidney Injury3.3%8
9
Diplopia3.3%8
10
Condition Aggravated3.3%8
11
Off Label Use3.3%8
12
Ocular Myasthenia3.3%8
13
Myasthenia Gravis Crisis2.8%7
14
Eyelid Ptosis2.8%7
15
Anaemia2.8%7

These are voluntary reports and do not establish that ambenonium caused these reactions.

Report severity

92.3%Serious227 reports
42.3%Hospitalizations104 reports
8.9%Fatal22 reports

Seriousness is determined by the reporter, not by OpenClaim.

Ambenonium drug interactions

Other drugs that appear in adverse event reports alongside ambenonium. Drugs flagged as a suspected cause appear in the first column. Drugs taken at the same time but not suspected appear in the second.

Also suspected

1
Prednisone7.7%19
2
Pyridostigmine-bromide7.3%18
3
Tacrolimus7.3%18
4
Eculizumab6.9%17
5
Cyclosporine5.7%14
6
Azathioprine5.3%13
7
Prednisolone4.1%10
8
Efgartigimod4.1%10
9
Metformin3.3%8
10
Atorvastatin-calcium3.3%8
11
Ravulizumab-cwvz3.3%8
12
Methylprednisolone2.8%7
13
Pregabalin2.8%7
14
Levothyroxine-sodium2.4%6
15
Pantoprazole-sodium2.0%5

Taken alongside

1
Prednisone19.9%49
2
Pyridostigmine-bromide14.6%36
3
Prednisolone14.2%35
4
Tacrolimus10.6%26
5
Furosemide9.3%23
6
Omeprazole8.9%22
7
Aspirin8.1%20
8
Bisoprolol-fumarate6.1%15
9
Insulin5.7%14
10
Cyclosporine5.7%14
11
Lansoprazole5.3%13
12
Methylprednisolone4.9%12
13
Ergocalciferol4.9%12
14
Azathioprine4.5%11
15
Potassium-chloride4.1%10

Co-occurrence in adverse event reports does not establish a drug interaction. Patients often take multiple medications, and these lists reflect prescribing patterns rather than causal relationships. Consult a healthcare provider about potential drug interactions.

Who reports ambenonium side effects

50.8% of ambenonium adverse event reports involve female patients and 38.6% involve male patients. The largest age group is adult at 59%. These figures reflect who reports side effects, not underlying risk.

Sex

Female50.8%
Male38.6%
Unknown10.6%

Age group

< 21.5%
2–110.0%
12–170.0%
18–6458.8%
65+39.7%

What is ambenonium used for

Conditions and purposes for which patients were taking ambenonium when the adverse event was reported.

Drug Use For Unknown IndicationEyelid PtosisHyperlipidaemiaInsomniaMuscular WeaknessMyasthenia GravisMyasthenic SyndromeMuscular WeaknessMyasthenia GravisNervous System DisorderOcular MyastheniaOcular MyastheniaProduct Used For Unknown IndicationProphylaxisProduct Used For Unknown Indication

Showing 15 of 19 indications

Ambenonium brand names and reporting trend

Ambenonium is sold under the brand name Mytelase.

Brand names

Mytelase67

Quarterly reports (20042025)

20052010201520202025

An upward trend reflects increased FAERS reporting overall, not necessarily increased risk.

Taking ambenonium with another medication?

Ask OpenClaim about your specific drug combination. Get a sourced report using FDA data, drug labels, and medical literature.