Tamsulon: Indications, Mechanism of Action, Dosage, Side Effects, Warnings, Contraindications and Interactions

It is in a group of drugs called alpha-adrenergic blockers.

Chemical formula

The active ingredient in tamsulon is tamsulosin C20H28N2O5S.


Tamsulon comes as a 0.4 mg controlled-release capsule. to take orally.


Tamsulon is used in male patients to treat benign prostatic hyperplasia (an enlarged prostate).

Also for the treatment of symptoms associated with the lower urinary tract, which include:

  • Difficulty urinating (a weak flow, hesitation, dribbling, and incomplete emptying of the bladder).
  • Urination with pain.
  • Frequent urination
  • Urinary urgency.

Mechanism of action

Tamsulosin works by relaxing the muscles of the bladder and prostate, improving the flow of urine .


Tamsulon is usually taken once a day.

Tamsulon should be administered as prescribed by the doctor. It should not be taken neither more nor less, nor more often than what the doctor has prescribed.

Usually the treatment will start with a low dose of tamsulon, the doctor will increase the dose as he sees fit, after 2 to 4 weeks of treatment.

Side effects

  • Sore throat and trouble swallowing.
  • Back or chest pain
  • Fatigue.
  • Sickness.

If these side effects are mild, they can go away in a few days to a couple of weeks. But if they do not disappear, you should go to the doctor.

The serious side effects are:

  • Priapism.
  • Flu-like symptoms.
  • Blurry vision.
  • Low blood pressure that makes you feel dizzy when changing positions.

To reduce the risk of dizziness and lightheadedness, when rising from a sitting or lying position, do so slowly.

You should tell your doctor right away if you have serious side effects, such as: fainting.

If this happens, stop using this medicine and seek medical help immediately, or permanent problems could occur.

Seek immediate medical attention if you notice any symptoms of a serious allergic reaction, such as a rash, itching, swelling (especially of the face, tongue, and throat), severe dizziness, and difficulty breathing.

Warnings and Contraindications

Before taking tamsulon, you should inform your doctor if you are allergic, if you have low blood pressure problems, certain eye problems such as cataracts, glaucoma among others.

Tamsulon can make you dizzy or drowsy. Alcohol or marijuana can make you feel more dizzy or sleepy.

Do not drive, use machinery, or do anything that needs to be alert until the effects of the medicine have worn off and you can safely do so.

During pregnancy, this medicine should only be used when clearly needed.

There is no research to support that the drug passes into breast milk, so its administration in babies is not safe. The risks and benefits of using tamsulon should be discussed with your doctor.

Tamsulon is contraindicated in cases of:

  • Known hypersensitivity to tamsulosin and other components of the formulation.
  • History of orthostatic hypotension.
  • Severe liver failure
  • For use by women.
  • For children under 16 years of age.


Some products may interact with this medicine. Taking certain medications with tamsulon can increase the levels of tamsulosin in the body.

This increases the risk of side effects from tamsulosin. Some examples of these medications include:

  • Acid-blocking drug.
  • Antibiotics
  • Antidepressant
  • Antifungal medications.
  • Drugs for erectile dysfunction .

Taking erectile dysfunction medication with tamsulosin can cause very low blood pressure. Examples of these medications include:

  • Sildenafil.
  • Tadalafil.
  • Vardenafil.

Taking alfuzosin with tamsulon could worsen low blood pressure, a side effect of tamsulosin. Symptoms can include dizziness, fainting, and falls.

Taking medicines called alpha blockers with tamsulon can cause very low blood pressure. Examples of alpha blockers include: