Betanecol: Administration, Side Effects, Precautions, Interactions and Storage

It works by helping the bladder muscles contract efficiently, thus generating the ability to urinate without difficulty.

This medicine is used to treat bladder conditions that prevent average urine output caused by previous surgeries or by diseases or problems in the bladder muscle.

Administration of Betanecol

A doctor must prescribe this medicine before use. It should preferably be taken on the stomach without food to reduce nausea or vomiting.

The patient, for best results, should ingest Betanecol one hour before or two hours after meals or as indicated by the treating physician, for a period between 3 or 4 times a day; everything will depend on the severity of the condition.

Side effects

Bethanechol could produce some side effects in the affected body; among the symptoms are:

  • Abdominal pain.
  • Cramps in the stomach
  • Upset stomach or diarrhea.
  • Daze.
  • Sudden dizziness
  • Excessive sweating
  • Increased salivation
  • Headache.
  • Cloudy or watery eyes.
  • Unforeseen suffocation.
  • Increased urination

This medicine can cause serious side effects, so the patient should immediately contact their treating doctor if they have the following symptoms:

  • Difficulty breathing.
  • Cardiac arrhythmia.
  • Difficulty in walking.
  • Loss of the notion of time and space.
  • Physical decay
  • Drastic rise or fall of tension.

Betanecol does not usually cause allergic reactions and is less severe, but if the patient presents the following symptoms, he should contact his doctor immediately:


  • Inflammation of the face, lips, tongue, and throat.
  • Redness of the cheekbones of the beginning.
  • Acne.
  • Itching on the front or extremities of the body.
  • Difficulty breathing.
  • Severe dizziness
  • The rise in body temperature

This medicine does not usually cause an overdose. However, anyone with the following symptoms should contact their doctor immediately:

  • Disorientation.
  • Difficulty recognizing space and time.
  • Severe dizziness
  • Excessive sweating
  • Fainting.
  • Nausea or vomiting
  • Involuntary movements of the body limbs.
  • Rise in body temperature

Bethanechol Precautions

Bethanechol should not be used by patients who have certain diseases, illnesses, or conditions that could worsen with its use, such as:

  • Stomach or intestinal problems: spasms, ulcers, obstructions, among others.
  • Lung diseases: chronic pulmonary obstruction, asthma, or pneumonia.
  • Obstacles in the bladder.
  • Hyperthyroidism.
  • Heart problems: conditions in the arteries, slow or fast heart rate, among others.
  • Blood pressure.
  • Parkinson’s disease.

The patient should avoid consuming alcoholic beverages or drugs such as marijuana because it increases the risk of suffering from frequent dizziness, fainting, or disorientation.

Women who are in the process of pregnancy should use Betanecol only when strictly necessary to avoid complications in the development of the unborn.

There are no studies that prove or certify that this drug can pass into breast milk, so it is recommended that breastfeeding women tell their doctor about their condition before starting treatment with Betanecol.

If the patient wants to reduce the dizziness and lightheadedness that this medicine could generate, they should get up slowly until they acquire a posture or position.


Bethanechol may interfere with the effectiveness or function of some medications, especially those used for high blood pressure, such as mecamylamine.

That is why the patient must notify their doctor of all medications or treatments they are using, including over-the-counter products such as vitamins or supplements.

Betanecol storage

Betanecol must be stored at room temperature and away from moisture, heat, or sunlight. Refrigeration is not necessary unless indicated by the attending physician.

It should be kept out of the reach of children and pets to avoid risks that could affect the health or physical condition of those involved when taking medicine without medical supervision.

Suppose this drug expires while the patient is undergoing treatment. In that case, you should notify your doctor to determine if it should be discarded or, on the contrary, continue with its use until the stock is exhausted.