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orlistat, Xenical, alli

👤by AP 0 comments 🕔Tuesday, February 17th, 2015

DRUG CLASS AND MECHANISM: Orlistat is a drug that promotes loss of weight by preventing the digestion and absorption of fat in food. In the intestine, an enzyme called lipase (produced primarily by the pancreas) breaks apart fat in food so that it can be absorbed into the body. Orlistat blocks the action of lipase and thereby prevents the breakup and absorption of fat. Orlistat blocks absorption of about 25% of the fat in a meal. The unabsorbed fat is excreted in the stool. The FDA approved Orlistat by prescription in 1999. alli, a lower dose formulation of orlistat, was approved for purchase without a prescription "over the counter" in 2007.

PRESCRIBED FOR: Orlistat is combined with a reduced-calorie diet to promote weight loss. Orlistat also may be used to prevent weight gain after weight has been lost. Candidates for treatment with orlistat are patients who are obese with a body mass index (a measure of obesity) of more than 30 kg/m2. Candidates also include patients with a body mass index of between 27 and 30 kg/m2 if other risk factors for arteriosclerosis are present such as high blood pressure, diabetes, and elevated blood cholesterol or triglycerides. Based on several scientific studies, the average weight loss that is achieved when orlistat is taken as recommended for six months to one year is 12.4 to 13.4 pounds.

Medically Reviewed by a Doctor on 2/17/2015

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Pharmacy Author:

Omudhome Ogbru, PharmD

Omudhome Ogbru, PharmD

Dr. Ogbru received his Doctorate in Pharmacy from the University of the Pacific School of Pharmacy in 1995. He completed a Pharmacy Practice Residency at the University of Arizona/University Medical Center in 1996. He was a Professor of Pharmacy Practice and a Regional Clerkship Coordinator for the University of the Pacific School of Pharmacy from 1996-99.

Medical and Pharmacy Editor:

Jay W. Marks, MD

Jay W. Marks, MD

Jay W. Marks, MD, is a board-certified internist and gastroenterologist. He graduated from Yale University School of Medicine and trained in internal medicine and gastroenterology at UCLA/Cedars-Sinai Medical Center in Los Angeles.

Article Credits / Source

AP / MedicineNet.com

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