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Indian J Endocrinol Metab. 2011 Apr;15(2):99-104. doi: 10.4103/2230-8210.81938.

Evaluation of efficacy and safety of orlistat in obese patients.

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Department of Pharmacology, Government Medical College, Miraj, India.



Rapidly rising prevalence of obesity is alarming. Obesity predisposes to co-morbidities like hypertension, type 2 diabetes mellitus, dyslipidemias, thus substantially rising healthcare expenditure. Lifestyle modifications alone have very limited success, necessitating the addition of pharmacotherapy to it.


Present study was carried out to evaluate the efficacy and safety of orlistat in obese patients.


Eighty obese (BMI>30) patients according to inclusion and exclusion criteria were randomized into either of the two groups. Group 1 received orlistat 120 mg three times a day and group 2 received placebo three times a day. Weight, waist circumference, BMI, total cholesterol, triglycerides, HDL, LDL were measured at baseline and then at 8(th), 16(th) and 24(th) week. ADR reported by patients were recorded. For safety evaluation various hematological and biochemical parameters were assessed. Z test was used for analysis of data.


Compared to placebo, orlistat caused significant reduction (P<0.05) in weight (4.65 kg vs 2.5 kg; orlistat vs placebo, respectively), BMI (1.91 kg/m(2) vs 0.64 kg/m(2)) and waist circumference (4.84 cm vs 2 cm), cholesterol (10.68 mg vs 6.18 mg) and LDL level (5.87 mg vs 2.33 mg). In the orlistat group, the GI side effects like loose stools, oily stools/spotting, abdominal pain and fecal urgency were observed.


Orlistat is an effective and well-tolerated antiobesity drug, which can be employed as an adjunct to therapeutic lifestyle changes to achieve and maintain optimal weight.


Antiobesity agents; obesity; orlistat; weight loss

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