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Bethanechol Side Effects

The most commonly reported side effects of bethanechol include fatigue, fall, and urinary tract infection, based on 1,917 FDA adverse event reports from 2004 to 2025. 3.8% of reports found the drug to be ineffective.

Bethanechol side effects

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

1
Fatigue5.6%107
2
Fall5.5%106
3
Urinary Tract Infection5.0%95
4
Nausea4.9%93
5
Off Label Use4.8%92
6
Diarrhoea4.6%89
7
Death4.5%86
8
Pain4.3%83
9
Drug Ineffective3.8%73
10
Dizziness3.8%72
11
Asthenia3.4%66
12
Gait Disturbance3.4%66
13
Pneumonia3.2%61
14
Vomiting3.0%57
15
Headache2.9%56

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

Report severity

69.0%Serious1,323 reports
40.0%Hospitalizations766 reports
12.3%Fatal235 reports

Seriousness is determined by the reporter, not by OpenClaim.

Bethanechol drug interactions

Other drugs that appear in adverse event reports alongside bethanechol. 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
Dalfampridine5.2%100
2
Sodium-oxybate4.7%90
3
Lenalidomide3.7%71
4
Interferon3.5%67
5
Dimethyl3.0%57
6
Omeprazole2.9%55
7
Esomeprazole2.5%48
8
Pregabalin2.1%40
9
Adalimumab2.0%38
10
Natalizumab1.9%37
11
Pantoprazole-sodium1.7%33
12
Ivacaftor1.7%32
13
Aztreonam1.5%29
14
Amlodipine1.4%26
15
Levodopa1.4%26

Taken alongside

1
Acetaminophen23.9%458
2
Ergocalciferol22.7%436
3
Aspirin18.6%357
4
Gabapentin18.6%356
5
Tamsulosin-hydrochloride16.5%316
6
Omeprazole16.4%314
7
Levothyroxine-sodium16.3%312
8
Albuterol16.3%312
9
Furosemide15.8%302
10
Atorvastatin-calcium14.1%270
11
Fluticasone13.4%256
12
Pantoprazole-sodium11.7%225
13
Amlodipine11.5%221
14
Metoprolol11.5%221
15
Baclofen11.5%220

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 bethanechol side effects

59.7% of bethanechol adverse event reports involve female patients and 36.3% involve male patients. The largest age group is elderly at 48%. These figures reflect who reports side effects, not underlying risk.

Sex

Female59.7%
Male36.3%
Unknown4.0%

Age group

< 21.8%
2–113.2%
12–172.0%
18–6445.1%
65+47.9%

What is bethanechol used for

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

Automatic BladderAutonomic Nervous System ImbalanceAutomatic BladderBasilar Artery AneurysmBenign Prostatic HyperplasiaBipolar I DisorderBladder DiscomfortBladder DisorderBladder DysfunctionBladder SpasmBowel Movement IrregularityBenign Prostatic HyperplasiaBladder DisorderBladder DysfunctionBladder Spasm

Showing 15 of 104 indications

Bethanechol brand names and reporting trend

Bethanechol is sold under the brand name Myotonachol.

Brand names

Myotonachol1,694

Quarterly reports (20042025)

20052010201520202025

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

Taking bethanechol with another medication?

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