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Weight Loss Drug Lorcaserin

Available by prescription only, lorcaserin (Belviq®) is a prescription weight loss drug. It is designed for use in combination with a low-calorie diet and a regular exercise program. Lorcaserin is approved for adults who are obese or who have a medical condition, such as diabetes, that is caused by being overweight.
During clinical studies, 47.1 percent of people who took lorcaserin for up to a year lost at least 5 percent of their body weight, compared to 22.6 percent of people who took a "sugar pill" that did not contain any active ingredients (placebo).
Although this can be an effective weight loss drug for many people, you may not be able to continue taking lorcaserin if you have not lost at least 5 percent of your weight within 12 weeks of treatment. In these cases, people are usually unlikely to benefit from this particular diet pill.
(Click Lorcaserin to learn more about this weight loss drug. This full-length article discusses how the product works, possible side effects, and more.)
Last reviewed by: Kristi Monson, PharmD
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