News Release

Bust up big kidney stones with tamsulosin

The small ones have to leave on their own

Peer-Reviewed Publication

American College of Emergency Physicians

WASHINGTON --Tamsulosin works no better than placebo on small kidney stones, but does improve passage of more large kidney stones than placebo does. The results of this large clinical trial evaluating tamsulosin versus placebo were published online Friday in Annals of Emergency Medicine ("Distal Ureteric Stones and Tamsulosin: A Double-Blind, Placebo-Controlled, Randomized, Multi-Center Trial (The DUST Trial)").

"Kidney stones bring more than a million Americans a year to emergency departments because they are excruciatingly painful," said lead study author Jeremy Furyk, MBBS, MPH and TM of The Townsville Hospital in Townsville, Queensland, Australia. "The news on small kidney stones isn't positive, but tamsulosin appears to offer benefit to those unlucky people whose kidney stones are really big."

Within 28 days of a visit to the emergency department, kidney stone passage occurred in 87 percent of patients treated with tamsulosin and 81.9 percent of those treated with placebo, a difference not considered significant. However, 83.3 percent of patients treated with tamsulosin whose kidney stones measured between 5 and 10 millimeters in length passed their stones, compared to only 61 percent of those who were treated with placebo.

"For patients with small kidney stones, time seems to be the one sure cure," said Dr. Furyk. "However, when treating patients with large kidney stones, emergency physicians should definitely consider tamsulosin."


Annals of Emergency Medicine is the peer-reviewed scientific journal for the American College of Emergency Physicians, the national medical society representing emergency medicine. ACEP is committed to advancing emergency care through continuing education, research, and public education. Headquartered in Dallas, Texas, ACEP has 53 chapters representing each state, as well as Puerto Rico and the District of Columbia. A Government Services Chapter represents emergency physicians employed by military branches and other government agencies. For more information, visit

Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.