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Tamsulosin Dosage

Medically reviewed by Last updated on May 16, 2019.

Applies to the following strengths: 0.4 mg

Usual Adult Dose for Benign Prostatic Hyperplasia

Initial Dose: 0.4 mg orally once a day
Maximum Dose: 0.8 mg orally once a day

-If use is discontinued or interrupted for several days at either the 0.4 mg or 0.8 mg dose, treatment should be initiated again with the 0.4 mg once a day dose.

Use: Treatment of the signs and symptoms of 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 effectiveness have not been established in patients younger than 18 years.

Consult WARNINGS section for additional precautions.


Data not available

Other Comments

Administration advice:
-This drug should be administered on an empty stomach approximately a half hour following the same meal each day.
-Capsules should not be crushed or chewed.
-Dosage units should be swallowed whole and not crushed, chewed, broken, or opened.
-If therapy is discontinued for several days, at either the 0.4 mg or 0.8 mg dose, therapy should be started again with the 0.4 mg once a day dose.

-This drug is not indicated in women or children.

Patient advice:
-Patients should be cautioned about driving, operating machinery, or performing hazardous tasks.
-Patients should seek immediate medical attention if priapism occurs.

Further information

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