Drug Description

Flomax (also known as Tamsulosin) is an adrenergic antagonist. Tamsulosin, created by a well-known drug company, was released in 1996 and approved by FDA. The biological half-life of this medicine is 9-13 hours. Flomax belongs to the group of medicines called alpha blockers.


Flomax is used for the treatment of BPH (also called “enlarged prostate”). It acts by relaxing the bladder and prostate muscles, thereby helping the patient to alleviate symptoms of benign prostate hyperplasia (such urination problems, decreased urine stream and painful urination). This drug is contraindicated for women and kids under the age of 18.


Take the drug by mouth half an hour after eating. Flomax is usually taken once a day. Swallow the pill whole instead of crushing or chewing it.
Stick to your doctor’s recommendations regarding the drug dosage and the duration of the treatment. It may take a month to note significant improvement.
You should regularly measure your blood pressure during the therapy and get tested for prostate cancer before and after the treatment.
Take Flomax at the same time every day to achieve the best result. Before starting the treatment, tell your doctor if you’re suffering from liver or renal dysfunction, prostate cancer in history, hypotension and allergy to any sulfa drugs.

Skipping the dose/overdose

If you skipped the dose, take it as soon as possible. However, if it’s already time for the but next dosage, you should skip the missed one, as it can lead to overdose. Avoid changing the dosage or stopping the treatment without the doctor’s approval.

Adverse effects

The medicine can cause the following adverse effects:

  • hypotension,
  • loss of consciousness,
  • vertigo,
  • head pain,
  • diarrhea,
  • sickness,
  • dizziness,
  • sleepiness,
  • fatigue,
  • vomiting,
  • breast pain,
  • premature ejaculation,
  • vision impairment,
  • pain in the back,
  • tooth problem,
  • skin damage,
  • pain in the throat,
  • pain during erection or erection that last for more than four hours,
  • vision impairment,
  • sleeping problems,
  • lack of libido,
  • fever.

Drug interactions

Inform your doctor about all the drugs you’re taking (including the prescription and non- prescription drugs, vitamins, hypertension drugs and herbal supplements). Tamsulosin can affect pupils during cataract surgery. Therefore, you should tell the surgeon that you’re taking this drug.
It is important to get help from your doctor immediately. Avoid taking this drug if you’re allergic to Alfuzosin, Tamsulosin, Doxazosin, Prazosin or Terazosin. As Flomax causes sleepiness and vertigo, you should avoid driving or operating heavy machinery.