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Pharmacy researcher finds most popular weight-loss drug strongly alters other drug therapies
Date:12/10/2012

o metabolize a wide range of medicines including aspirin and the cancer drugs irinotecan and pentyl carbamate of p-aminobenzyl carbamate of doxazolidine.

"This study shows that orlistat profoundly alters the therapeutic potential of the anti-cancer drugs," Yan said. "In the case of the anti-cancer drugs, it weakens their effectiveness."

Prior or co-presence of orlistat with one of the anti-cancer drugs resulted in cancer cells being far more prolific.

"Alli-based interactions can be key factors in the efficacy of medicines," Yan said.

Yan was also interested in Alli's effects on aspirin and its use as a blood thinner. "Aspirin is used to treat blood clots. Yan predicated: "Orlistat would increase the therapeutic potential of aspirin, which may increase the tendency of bleeding."

This isn't the first time that Yan has found critical drug interactions in his studies.

In 2006, he discovered that the anti-viral drug Tamiflu would be rendered ineffective in patients also taking the anti-clotting drug Plavix. His published findings have resulted in new dosing regimens for patients who need both drugs.

Yan is one of the authors of the 6-volume Encyclopedia of Drug Metabolism and Interactions. This state-of-the-art integrated reference represents a global effort and presents more than 120 chapters by prominent authors from 11 different countries: the United States, Canada, United Kingdom, Germany, Australia, Singapore, India, Japan, France, Denmark, and Switzerland.


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Contact: Dave Lavallee
dlavallee@advance.uri.edu
401-874-5862
University of Rhode Island
Source:Eurekalert

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