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Tamsulosin Dosage

Medically reviewed by Last updated on Mar 24, 2023.

Applies to the following strengths: 0.4 mg

Usual Adult Dose for Benign Prostatic Hyperplasia

0.4 mg orally once a day; the dose may be increased to 0.8 mg orally once a day in patients who fail to respond to 0.4 mg once a day within 2 to 4 weeks


Use: Benign prostatic hyperplasia (BPH)

Renal Dose Adjustments

Renal impairment (CrCl greater than 10 mL/min): No adjustment recommended
End-stage renal disease (CrCl less than 10 mL/min): Data not available

Liver Dose Adjustments

Mild or moderate hepatic impairment: No adjustment recommended
Severe hepatic impairment: Data not available

Dose Adjustments

For patients who do not respond to the 0.4 mg dose after 2 to 4 weeks, the dose may be increased to 0.8 mg orally once a day.



Safety and efficacy have not been established in patients younger than 18 years.

Consult WARNINGS section for additional precautions.


No adjustment recommended.

Other Comments

Administration advice:

Storage requirements:


Patient advice:

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.