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Meta-analysis and Approach of the Real Impact of Anorexigenic Drugs in the Obesity in Humans: The Last Five Years of the Randomized Studies

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Introduction: Obesity shows a multifactorial disease and presents a serious public health problem, with an alarming epidemic character. According to NHANES (National Health and Nutrition Examination Survey) from 2015 to 2016, 39.6% of American adults and 18.5% of young people were obese and 7.7% of adults and 5.6% of young people had severe obesity. Brazil ranks fifth in the world ranking, with about 18 million people reaching up to 70 million overweight individuals. Despite shortterm weight loss with diet and exercise, weight regain continues to be a concern. Anti-obesity drugs, such as Sibutramine (SIB), Phentermine (PHEN), Fenproporex (FEN), Mazindol (MAZ), Amfepramone (AMFE) and Orlistat (ORL) may play a role in weight reduction in patients whose condition is refractory to non- and maintenance of weight loss.

Objective: A systematic review followed by meta-analysis of randomized clinical trials over the past five years to explore the efficacy and safety of anorexigenic drugs for weight reduction and consequent treatment of obesity.

Methods: The search strategy in MEDLINE / Pubmed, Web of Science, ScienceDirect Journals (Elsevier), Scopus (Elsevier), OneFile (Gale) is as follows : - search for mesh terms (Sibutramine, Phentermine, Fenproporex, Mazindol, Amfepramone , Orlistat, Weight loss, Safety), and the use of booleans "and" between mesh terms and "or" among historical findings.

Results: It was observed that in the last five years of randomized studies no significant general complications were found, with only 5.7%. The mean overall weight loss was 6.18 (± 2.8) kg in the mean time of 12 months. The overall success rate among these drugs was 80.18%. The p-value values did not present a significant statistical difference, being p <0.05 within each drug group analyzed, for both weight and success rates.

Conclusion: The scientific findings of randomized studies on the use of anorexigenic drugs to treat obesity have shown safety and efficiency in the last five years, with a reasonable weight loss and no significant complications.
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Keywords: Anorexigenic drugs; complications; exercise; obesity; safety; weight loss

Document Type: Review Article

Publication date: September 1, 2020

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  • Current Diabetes Reviews publishes frontier reviews on all the latest advances on diabetes and its related areas e.g. pharmacology, pathogenesis, complications, epidemiology, clinical care, and therapy.

    The journal's aim is to publish the highest quality review articles dedicated to clinical research in the field. The journal is essential reading for all researchers and clinicians who are involved in the field of diabetes.
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