Before taking bethanechol, tell your doctor if you are taking any of the following medicines:
donepezil (Aricept);
tacrine (Cognex);
quinidine (Cardioquin, others); or
procainamide (Pronestyl, Procan SR).
You may not be able to take bethanechol, or you may require a dosage adjustment or special monitoring during treatment if you are taking any of the medicines listed above.
Drugs other than those listed here may also interact with bethanechol. Talk to your doctor and pharmacist before taking or using any other prescription or over-the-counter medicines.
If you experience any of the following serious side effects, stop taking bethanechol and seek emergency medical attention:
an allergic reaction (difficulty breathing; closing of your throat; swelling of your lips, tongue, or face; or hives); or
shortness of breath, wheezing, or tightness in your chest.
Other, less serious side effects may be more likely to occur. Continue to take bethanechol and talk to your doctor if you experience
dizziness or drowsiness;
headache;
nausea, vomiting, diarrhea, or abdominal discomfort;
slow heartbeats followed by fast heartbeats;
flushing or warmth about the face;
sweating; or
tearing eyes.
Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome.
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