- people who are considered to be obese because they have a body mass index (BMI) of 30 or above. BMI is a calculation that uses your height and weight to estimate your body fatness.
- people who are overweight (they have a BMI of 27 or above) who also have at least one weight-related health condition, such as high blood pressure, type 2 diabetes or high cholesterol.
In studies, nearly half of the people who took Belviq along with dieting and exercise lost at least 5 percent of their total body weight. In people who had type 2 diabetes, 38 percent lost at least 5 percent of their total body weight after taking Belviq, while only 16 percent of people with the disease who did not take Belviq lost that much weight. Taking Belviq also appeared to help people with type 2 diabetes control their blood sugar levels better.
The FDA recommends that people who take Belviq for 12 weeks and don't lose at least 5 percent of their total body weight should discontinue taking the drug, because it is unlikely to help them achieve significant weight loss.