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Tamsulosin (Flomax) for kidney stones is a fairly new treatment approach, but one that has had promising results for patients who need to pass a stone quickly.  


The average dose is 0.4 mg. You should always follow your doctor’s instructions regarding dosing.

Side Effects

Some people experience dizziness, especially for the first few doses of tamsulosin.


How does tamsulosin work for kidney stones?

Tamsulosin helps the smooth muscle relax, which in turn helps expand the opening enough to let a kidney stone pass.

Does Flomax hurt your kidneys?

There is no evidence that it hurts the kidneys. 

What can you do to help pass a kidney stone faster?

The best way to get a kidney stone to pass faster is to drink lots of water. Water increases urination, which is necessary for the stone to leave the body.

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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