Adolescent obesity is a health problem worldwide. Drug therapy for obesity in children is only acceptable if done within the framework of a comprehensive weight loss, prevention of comorbidities, including health education, changes in lifestyles, diet and exercise. These pharmacological treatments indicate that mainly young patients did not respond to standard measures and developing complications. The role of bariatric surgery, with or without the use of drugs is subject to further research to elucidate its role among the various treatment options for these patients. Currently being studied a wide range of drugs to those included gastrointestinal hormones. Scientific information regarding the use of exenatide in obese patients without diabetes is still limited. The use of exenatide in adolescents with morbid obesity may represent a therapeutic complement invaluable, effective and free of complications, and prevents future bariatric surgery.