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  • Title: Orlistat (Ro 18-0647), a lipase inhibitor, in the treatment of human obesity: a multiple dose study.
    Author: Drent ML, Larsson I, William-Olsson T, Quaade F, Czubayko F, von Bergmann K, Strobel W, Sjöström L, van der Veen EA.
    Journal: Int J Obes Relat Metab Disord; 1995 Apr; 19(4):221-6. PubMed ID: 7627244.
    Abstract:
    OBJECTIVE: To evaluate efficacy and tolerability of the lipase inhibitor Orlistat (Ro 18-0647) in doses of 10, 60 and 120 mg three times a day in addition to a mild hypocaloric diet containing 30% of calories as fat. DESIGN: 4 week single-blind placebo run-in period of diet alone followed by a 12 week double-blind, placebo-controlled, randomized treatment period. SETTINGS: Five European outpatient clinics specializing in endocrinology and/or the treatment of obesity, one central laboratory. SUBJECTS: Of 237 healthy obese subjects meeting the inclusion criteria, 188 showed compliance to the diet during the run-in period and were randomized for the treatment period. MAIN OUTCOME MEASURES: Primary efficacy criterion was the difference in weight loss after 12 weeks of treatment between the Orlistat treated groups and the diet alone group. Secondary efficacy criteria were changes in serum total, HDL- and LDL-cholesterol. RESULTS: Compared to placebo a mean (+/- s.e.) additional weight loss of 0.63 +/- 0.54 kg with 30 mg a day (P = 0.246), 0.71 +/- 0.55 kg with 180 mg a day (P = 0.190) and 1.75 +/- 0.54 kg with 360 mg a day was seen (P = 0.001) or Orlistat was observed. Overall data indicated dose-dependency. Small decreases were seen in total and LDL-cholesterol (significant in the 180 and 360 mg a day groups) and LDL- to HDL-cholesterol ratio (significant in the 360 mg a day group only). Mild, mostly gastrointestinal side effects were observed more frequently in the Orlistat groups and caused premature withdrawal from the study in only four patients. No marked laboratory abnormalities were shown, including the lipid-soluble vitamins A, D and E. CONCLUSION: Orlistat, in an apparently dose-dependent manner, leads to additional weight loss compared to diet alone and overall, is well tolerated.
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