The prevalence of adolescent severe obesity is at an all-time high in the United States and the refractory nature of this disease has led to a serious and challenging conundrum in terms of how to provide effective, safe, scalable, and durable treatments without placing undue strain on the healthcare system. Clinical practice guidelines recommend behavioral interventions as the primary strategy for all ages and classes of obesity - moderate to severe. In 2017, the U.S. Preventive Services Task Force (USPSTF) released updated screening recommendations concluding that comprehensive, intensive behavioral interventions with a total of ≥26 contact hours over a period of 2-12 months resulted in weight loss in youth with obesity, with ≥52 contact hours leading to even greater weight loss and improvements in some cardiometabolic risk factors.

However, the practicality of delivering these types of intensive behavioral services to the millions of youth with severe obesity in the U.S. is debatable not only because of the treatment-resistant nature of severe obesity, but also due to the time-commitment, acceptability, and sustainability of this approach for adolescent patients and their families along with the extensive resources required to provide these interventions. Indeed, fewer than 50% of pediatric patients referred for weight management services enroll in treatment, and high attrition rates of up to 50% have been reported in behavioral-based clinical trials and in the clinical setting. Moreover, adherence to behavioral counseling significantly diminishes over time, which too often erodes early weight loss success and ultimately derails durability. The reality of what most patients/families are able to do and the unique physiological and psychosocial features of severe obesity in adolescence do not seem to align well with the degree of intensity of behavioral interventions shown to be effective by the USPSTF. Therefore, a critical appraisal of the feasibility, effectiveness, and sustainability of the USPSTF recommendations among adolescents with severe obesity is warranted.

While behavior change is an indispensable component of any effective weight loss approach, adjunctive strategies such as pharmacotherapy may enhance outcomes in adolescents with severe obesity. Many maladaptive behaviors attributed to obesity are driven by underlying biological forces, such as increased appetite and food palatability, that are largely beyond the control of the individual. Pharmacotherapy can help facilitate behavior change by disrupting core pathophysiological processes and restoring homeostasis to the energy regulatory system, therein enabling individuals to sustain healthy behavior change. Though under-explored as a treatment for adolescent obesity, pharmacotherapy along with relatively low-intensity behavioral counseling (<26 contact hours) represents a potentially effective, durable, and safe treatment strategy. This approach may be more practical and feasible to implement on a broad scale, be preferred by patients/families, utilize fewer healthcare resources, and cost less to deliver compared to comprehensive, intensive behavioral interventions.

This is a two-arm, randomized clinical trial in adolescents with severe obesity evaluating 52 weeks of intensive behavioral counseling, aligned with USPSTF recommendations (52 contact hours), vs. 52 weeks of medical management with semaglutide (glucagon-like peptide-1 receptor agonist) plus relatively low-intensity behavioral counseling (12 contact hours).

Inclusion Criteria:

• Obesity (Body Mass Index (BMI) >/= 95th percentile or BMI >/= 30 kg/m2)
• Age 12 to < 18 years old and Tanner stage >1

Exclusion Criteria:

• Diabetes (type 1 or 2)
• Current or recent (< 6 months prior to enrollment) use of anti-obesity medication(s) defined as orlistat, phentermine, topiramate, combination phentermine/topiramate, liraglutide (or other GLP-1RA) and/or combination naltrexone/bupropion (monotherapy use of naltrexone or bupropion is not an exclusion)
• Previous bariatric surgery
• Any history of treatment with growth hormone
• Medically-documented history of bulimia nervosa
• Any history of schizophrenia, psychosis, mania, chemical dependency
• Unstable depression requiring hospitalization within the previous 6 month
• Any history of suicide attempt
• History of suicidal ideation or self-harm within the previous 30 days as determined at screening by a PHQ-9 score >/= 15 or Suicidal ideation of type 4 or 5 on the C-SSRS
• Current pregnancy or plans to become pregnant
• ALT or AST >/= 5 times the upper limit of normal
• Creatinine > 1.2 mg/dL
• Uncontrolled hypertension as determined by the local medical monitor
• Diagnosed and medically-documented monogenic obesity
• Medically-documented history of cholelithiasis
• Untreated thyroid disorder
• Medically documented history of pancreatitis
• Personal or family history of medullary thyroid carcinoma or multiple endocrine neoplasia syndrome type 2
• Clinically significant heart disease as determined by the local medical monitor
• Personal history of malignant neoplasms within the past five years
• Hypersensitivity to any component of semaglutide

To be determined

Sharing will be available 10 years after the trial has been concluded.

Individuals should contact the study PI for information.