Men Home > Tamsulosin Hydrochloride

The prescription drug tamsulosin hydrochloride (Flomax®) is licensed to treat enlarged prostate symptoms, such as frequent urination. It belongs to a class of drugs known as alpha blockers, and it works by blocking alpha-1 receptors, which are found in several places in the body, including the prostate gland.
Tamsulosin comes in capsule form. When first starting the drug, the dose is 0.4 mg once daily. If the medication doesn't appear to be working after two to four weeks, your healthcare provider may increase your dose to 0.8 mg once daily.
Potential side effects of tamsulosin include:
  • Abnormal ejaculation
  • Runny or stuffy nose
  • Dizziness.
However, most people are able to use it without any problems.
(To read more about this medication, including how it performed in clinical trials, click Tamsulosin.)
Written by/reviewed by:
Last reviewed by: Arthur Schoenstadt, MD
Last updated/reviewed:
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