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Tamsulosin is used in the treatment of benign prostatic hyperplasia (enlarged prostate)

How it works

Tamsulosin works by relaxing muscle around the bladder exit and prostate gland so urine is passed more easily.

Common side effects

Headache, Dizziness, Back pain, Blurred vision, Decreased libido, Sinus inflammation, Running nose, Insomnia, Weakness, Sleepiness, Ejaculation disorder, Nausea, Infection, Pharyngitis, tooth disorders, Diarrhoea, Cough, Chest pain

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Expert advice

  • Take the drug 30 minutes after the same meal every day.
  • You may feel very dizzy when you first wake up. Be careful when standing or sitting up from a lying position.
  • Do not start or continue the tamsulosin tablets and consult your doctor If you are allergic to tamsulosin, soya, peanut or to any of the other ingredients of tablet/capsule.
  • Do not stop taking this medicine suddenly without consulting your doctor.
  • Tamsulosin lowers blood pressure and may cause dizziness or fainting, especially when you first start taking it, or when you start taking it again. Call your doctor if you have severe dizziness or feel like you might pass out.

Frequently asked questions



Is tamsulosin/ Flomax/ Veltam available over the counter?
No. Tamsulosin/ Flomax/ Veltam is not available over the counter. It is a prescription drug


Is tamsulosin a steroid/ a diuretic?
No. Tamsulosin is not a steroid or diuretic. It is an alpha blocker


Can I take tamsulosin with Cialis/ tadalafil/ finasteride/ ibuprofen/ sildenafil/ Viagra/ paracetamol/Tylenol/ Sudafed/ aspirin/, ciprofloxacin?
There are no confirmed studies about any interaction between tamsulosin and finasteride/ ibuprofen/ paracetamol/ Sudafed/ aspirin/ ciprofloxacin. However when tamsulosin is taken along with tadalafil or sildenefil the blood pressure may get lowered. Consult your doctor before use

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Does tamsulosin cause weight gain?
There is no confirmed evidence about tamsulosin causing weight gain. However the effect may vary with the individual taking the medicine


Does tamsulosin lower prostate specific antigen?
Tamsulosin can lower the prostate specific antigen. However the effect may vary with the individual taking the medicine


Does tamsulosin shrink prostate?
Tamsulosin is used to treat symptoms of enlarge prostate (benign prostatic hyperplasia), however tamsulosin does not shrink the prostate


Does tamsulosin contain sulfa?
Yes, tamsulosin contains sulpha (sulphur moiety, sulphonamide). Please consult your doctor prior to taking tamsulosin, if you have any allergies to foods, dyes, or preservatives (sulfa allergy).

Content on this page was last updated on 09 February, 2017, by Dr. Varun Gupta (MD Pharmacology)