Obesity
Conditions
Brief summary
This study will compare the effectiveness of behavioral and pharmacologic treatment, alone and combined, for improvements in weight loss, cardiovascular risk factors, and psychosocial functioning following metabolic and bariatric surgery.
Detailed description
Metabolic and bariatric surgery is currently the most effective treatment for severe obesity; however, a substantial proportion of patients attain suboptimal weight losses and continue to struggle with obesity, weight regain, and related medical comorbidities after surgery. Thus, this study aims to perform a randomized double-blind placebo-controlled study to test the effectiveness of a rigorous manualized behavioral weight loss treatment and a FDA-approved weight loss agent (naltrexone+bupropion), alone and in combination, for improving weight loss, cardiovascular risk factors, and psychosocial functioning after metabolic and bariatric surgery. This study will produce important new clinical findings regarding the utility and effectiveness of pharmacotherapy and behavioral weight loss for a rapidly growing obesity subgroup and will inform care models for managing chronic and refractory obesity to enhance outcomes after metabolic and bariatric surgery.
Interventions
Participants in this intervention will take active naltrexone and bupropion pills.
BEHAVIORALBehavioral Weight Loss
Participants in this intervention will receive behavioral weight loss treatment.
OTHERPlacebo
Participants in this intervention will take inactive (placebo) pills.
Sponsors
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
Yale University
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
QUADRUPLE (Subject, Caregiver, Investigator, Outcomes Assessor)
Eligibility
Sex/Gender
ALL
Age
18 Years to 70 Years
Healthy volunteers
No
Inclusion criteria
* Provision of signed and dated informed consent form * Stated willingness to comply with all study procedures and availability for the duration of the study (up to 18 months: 6-month treatment plus 12-month follow up) * Have a BMI ≥30 (or BMI ≥27 with a medical comorbidity) and BMI ≤50 kg/m2 * Have had laparoscopic Roux-en-Y gastric bypass or sleeve gastrectomy * Suboptimal weight outcomes after MBS * Be an otherwise healthy subject without uncontrolled medical problems, as determined by the study physician and medical co-investigators (physical examination, laboratory studies). * Have had a physical in the past year * Read, comprehend, and write English at a sufficient level to complete study-related materials. * For females of reproductive potential: use of highly effective contraception and agreement to use such a method during study participation * For males of reproductive potential: use of condoms or other methods to ensure effective contraception with partner
Exclusion criteria
* Has a predisposition to seizures (e.g., subject with a history or evidence of seizure disorder, febrile seizures during childhood, brain tumor, cerebrovascular disease, or significant head trauma; has a family history of idiopathic seizure disorder or is currently being treated with medications or treatment regimens that lower seizure threshold). * Has a history of anorexia nervosa or history of bulimia nervosa. * Is currently taking a medication that is a contraindication to NB medication (e.g., MAOI, opiates). * Is currently using other medications for weight loss. * Has a history of allergy or sensitivity to bupropion or naltrexone. * Has a co-existing psychiatric condition that requires hospitalization or more intensive treatment (such as bipolar mood disorders, psychotic illnesses, or severe depression) * Has untreated hypertension with a seated systolic blood pressure \> 160 mmHg, diastolic blood pressure \> 100 mmHg, or heart rate \> 100 beats/minute. * Has a history of congenital heart disease, cardiovascular disease, cardiac arrhythmias requiring medication, or a history of cerebrovascular pathology including stroke. * Has current uncontrolled hypertension. * Has current uncontrolled Type I or Type 2 diabetes mellitus. * Has untreated hypothyroidism with a TSH \> 1.5 times the upper limit of normal for the test laboratory with repeat value that also exceeds this limit. * Has gallbladder disease. * Has a history of severe renal, hepatic, neurological, chronic pulmonary disease, or any other unstable medical disorder. * Has a recent history of drug or alcohol dependence. * Is currently in active effective treatment for eating or weight loss such as behavioral weight loss of FDA-approved weight loss medications. * Is currently participating in another clinical study in which the subject is or will be exposed to an investigational or a non-investigational drug or device. * Is breast-feeding or is pregnant or is not using a reliable form of birth control. * Reports active suicidal or homicidal ideation. * Has poor eye health
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Change in Body Mass Index (BMI) | Baseline to after the 6-month treatment | BMI is calculated using measured height and weight |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Change in Total cholesterol | From baseline at study enrollment to after the 6-month treatment | Total cholesterol will be measured by bloodwork. |
| Change in HbA1C | From baseline at study enrollment to after the 6-month treatment | HbA1C will be measured by bloodwork. HbA1C |
| Change in Glucose | From baseline at study enrollment to after the 6-month treatment | Glucose will be measured by bloodwork. |
| Change in Loss-of-Control Eating Frequency | From baseline interview at study enrollment to after the 6-month treatment | Loss-of-control eating frequency is a continuous variable of loss-of-control eating episodes .during the past 28 days assessed using the Eating Disorder Examination interview |
| Change in Eating Disorder Psychopathology | From baseline interview at study enrollment to after the 6-month treatment | Eating-disorder psychopathology is a continuous variable as assessed by the global score of the Eating Disorder Examination/Eating Disorder Examination-Questionnaire. Scores range from 0-6 (0=no eating-disorder psychopathology; 6=severe eating-disorder psychopathology). |
| Change in Food Craving | From baseline interview at study enrollment to after the 6-month treatment | Food craving is a continuous variable of food craving as assessed by the Food Craving Inventory. Scores range from 0-5 (0=no food craving; 5=greatest food craving). |
| Change in Depressive Symptoms | From baseline interview at study enrollment to after the 6-month treatment | Depressive Symptoms \[ Time Frame: From baseline interview at study enrollment to after the 6-month treatment \] Depressive symptoms is a continuous variable of depressive symptomatology as assessed by the self-report measure, the Patient Health Questionnaire - 9. Total scores range from 0-27 (0=no depressive symptoms, 27=greater depressive symptoms). Depressive symptoms is a continuous variable of depressive symptomatology as assessed by the self-report measure, the Patient Health Questionnaire - 9. Total scores range from 0-27 (0=no depressive symptoms, 27=greater depressive symptoms). |
Countries
United States
Contacts
Primary ContactValentina Ivezaj, Ph.D.
Backup ContactCarlos M Grilo, Ph.D.
Outcome results
None listed