Effect of VI-0521 (Qsymia®) on Glomerular Filtration Rate (GFR) in Overweight or Obese Healthy Subjects

Key Inclusion Criteria: * Male or female 18 - 65 years of age, medically healthy with no clinically significant screening abnormalities * BMI of ≥27 to ≤45 kg/m2 * No use of any medication (prescription, over the counter (OTC) or herbal preparations) with the exception of contraception for the entirety of the study Key Exclusion Criteria: * Allergy or hypersensitivity to radio contrast media, iodine or shellfish * Plans to significantly alter their diet through fasting, very low caloric intake, elimination of certain foods (gluten, milk, meat, etc.) or similar * Plans to undertake a significant change to physical exercise levels (i.e., initiate training for a marathon) during the study period * Consumption of a high protein diet or protein/body building meal supplementation and/or replacement. The use of any product containing creatine is strictly prohibited * History of glaucoma or increased intraocular pressure * History of bipolar disorder or psychosis, history of psychiatric hospitalization, greater than one lifetime episode of major depression, current depression of moderate or greater severity, presence or history of suicidal behavior or ideation with some intent to act on it * Cholelithiasis (gallstones) within the past 6 months * History of nephrolithiasis (kidney stones) * Evidence of any clinically significant renal, pulmonary, hepatic, psychiatric or other condition by history, physical examination or laboratory studies that, in the opinion of the investigator, would contraindicate the administration of study medications, affect compliance, interfere with study evaluations or confound the interpretation of study results as determined by the investigator * Current use of any tobacco products including cigarettes, cigars, pipes, and chewing tobacco, or nicotine replacement products (e.g., patch, gum, lozenge, etc.), or chronic use within the previous three months prior to screening