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Flomax is the brand name for tamsulosin, a prescription medicine for symptoms of benign prostatic hyperplasia. This condition is also called an enlarged prostate. Flomax relaxes muscle around the prostate and bladder outlet to make urination easier.
read more about flomax ...Flomax treats urinary symptoms caused by benign prostate enlargement. These can include a weak stream, trouble starting urination, and frequent urination. It relieves symptoms but does not shrink the prostate.
Tamsulosin blocks alpha-1 receptors in muscle around the prostate and bladder outlet. The muscle relaxes, reducing resistance to urine flow. Its action is different from medicines that gradually reduce prostate size.
Flomax is usually taken once daily, about half an hour after the same meal each day. Swallow the capsule whole without crushing, chewing, or opening it. Ask the prescriber how to restart it if treatment has been interrupted for several days.
Dizziness or a drop in blood pressure on standing can occur, especially when beginning treatment. Changes in ejaculation can also occur. Tell an eye surgeon if you take or have taken Flomax before cataract or glaucoma surgery.
No. It relaxes muscle around the prostate and bladder outlet to improve urine flow. Other medicines work by reducing prostate size.
Take it about half an hour after the same meal each day. Consistent timing helps keep its absorption more predictable.
Yes. It can lower blood pressure when you stand up. Rise carefully and tell the prescriber if dizziness or fainting occurs.
Current or past use can affect the iris during cataract or glaucoma surgery. Tell the eye surgeon before the procedure.
Benign prostatic hyperplasia (BPH) - Diagnosis and treatment. Mayo Clinic. https://www.mayoclinic.org/diseases-conditions/benign-prostatic-hyperplasia/diagnosis-treatment/drc-20370093. Date Accessed October 6, 2026.
Tamsulosin. MedlinePlus. https://www.medlineplus.gov/druginfo/meds/a698012.html. Date Accessed October 6, 2026.
Tamsulosin (Flomax): Enlarged Prostate Treatment. Cleveland Clinic. https://my.clevelandclinic.org/health/drugs/19711-tamsulosin-capsules. Date Accessed October 6, 2026.
Tamsulosin (oral route) - Side effects & dosage. Mayo Clinic. https://www.mayoclinic.org/drugs-supplements/tamsulosin-oral-route/description/drg-20068275. Date Accessed October 6, 2026.
TAMSULOSIN HYDROCHLORIDE capsule. DailyMed (National Library of Medicine). https://www.dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=a608ddc8-fe42-484e-b61f-307c60151138. Date Accessed October 6, 2026.