OverviewDosageSide EffectsInteractionsHalf-Life

Generic Name: Tamsulosin hydrochloride

Brands: Flomax

Class: Alpha-blocker

Availability: Prescription required

Molecular Formula: C20H28N2O5S

Substance UNII: G3P28OML5I

What is Tamsulosin?

Tamsulosin is an alpha-blocker. It is often sold under the trade name(s) Flomax.

What is Tamsulosin Used For?

Tamsulosin is prescribed to treat symptomatic benign prostatic hyperplasia (BPH) and chronic prostatitis. It is also sometimes prescribed to help pass kidney stones. 

How Does Tamsulosin Work?

Tamsulosin relaxes smooth muscles to allow urine to flow more freely, reduce discomfort from BPH, and facilitate the passage of kidney stones. 

How Long Does it Take for Tamsulosin to Work?

Most people may see results in 48 hours, although complete urinary relief can take up to six weeks. 

Do Not Use Tamsulosin If:

There are several situations where this medication may not be the right choice for you. According to the FDA, the following should not use tamsulosin:

Please note that this list may not be complete, and there may be other situations where the use of this drug is not advisable.

Disclaimer: this article does not constitute or replace medical advice. If you have an emergency or a serious medical question, please contact a medical professional or call 911 immediately. To see our full medical disclaimer, visit our Terms of Use page.

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