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Brand & Generic Names


Basic Information

  • Habit forming? No
  • Prescription needed? Yes
  • Available as generic? Yes
  • Drug class: Cholinergic


  • Helps initiate urination following surgery, or for persons with urinary infections or enlarged prostate.
  • Treats reflux esophagitis.

Dosage & Usage Information

How to take:
Tablet--Swallow with liquid, 1 hour before or 2 hours after eating.

When to take:
At the same times each day.

If you forget a dose:
Take as soon as you remember up to 2 hours late. If more than 2 hours, wait for next scheduled dose (don't double this dose).

What drug does:
Affects chemical reactions in the body that strengthen bladder muscles.

Time lapse before drug works:
30 to 90 minutes.

Don't take with:
Any other medicine without consulting your doctor or pharmacist.


Shortness of breath, wheezing or chest tightness, unconsciousness, coma.


  • Dial 911 (emergency) or O (operator) for an ambulance or medical help. Then give first aid immediately.
  • If patient is unconscious and not breathing, give mouth-to- mouth breathing. If there is no heartbeat, use cardiac massage and mouth-to-mouth breathing (CPR). Don't try to make patient vomit. If you can't get help quickly, take patient to nearest emergency facility.
  • See EMERGENCY Information.

Possible Adverse Reactions or Side Effects


    In case of overdose, see Overdose section.


    None expected.


    Dizziness, headache, faintness, blurred or changed vision, diarrhea, nausea, vomiting, stomach discomfort, belching, excessive urge to urinate.


    Shortness of breath, wheezing, tightness in chest.

Warnings & Precautions

Don't take if:
You are allergic to any cholinergic.

Before you start, consult your doctor:

  • If you plan to become pregnant within medication period.
  • If you have asthma.
  • If you have epilepsy.
  • If you have heart or blood-vessel disease.
  • If you have high or low blood pressure.
  • If you have overactive thyroid.
  • If you have intestinal blockage.
  • If you have Parkinson's disease.
  • If you have stomach problems (including ulcer).
  • If you have had bladder or intestinal surgery within 1 month.

Over age 60:
Adverse reactions and side effects may be more frequent and severe than in younger persons.

Risk to unborn child outweighs drug benefits. Don't use.

Unknown effect. Consult doctor.

Infants & children:
Use only under medical supervision.

Prolonged use:
No problems expected.

Skin & sunlight:
No problems expected.

Driving, piloting or hazardous work:
Don't drive or pilot aircraft until you learn how medicine affects you. Don't work around dangerous machinery. Don't climb ladders or work in high places. Danger increases if you drink alcohol or take medicine affecting alertness and reflexes, such as antihistamines, tranquilizers, sedatives, pain medicine, narcotics and mind-altering drugs.

May be unnecessary to finish medicine. Follow doctor's instructions.


  • Be cautious about standing up suddenly.
  • Interferes with laboratory studies of liver and pancreas function.
  • Side effects more likely with injections.

Possible Interaction with Other Drugs

------------------------ -----------------------
Cholinergics, Increased effect of
other* both drugs. Possible toxicity.
Ganglionic blockers* Decreased blood pressure.
Nitrates* Decreased bethanechol effect.
Procainamide Decreased bethanechol effect.
Quinidine Decreased bethanechol effect.

Possible Interaction with Other Substances

--------------- ---------------
Alcohol: None expected.
Beverages: None expected.
Cocaine: None expected.
Foods: None expected.
Marijuana: None expected.
Tobacco: None expected.

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