In one large study, 47% of people who took Belviq for a year lost at least 5 percent of their weight, while only 20% of people on a placebo, or dummy pill, lost that much. About 23% of people who took Belviq lost 10% or more of their starting weight, compared with about 8% of people taking a placebo.
Belviq is approved by the Food and Drug Administration for use in adults who are obese, or who are overweight and have a weight-related health problem, such as high blood pressure, high cholesterol or type 2 diabetes. Doctors prescribe Belviq as part of an overall weight-loss program that includes exercise and a reduced-calorie diet. To maximize your weight loss, follow your doctor's instructions for dieting, exercising and taking Belviq.