Belviq (lorcaserin) is a popular weight-loss drug manufactured by Eisai Inc. It’s been used by obese patients and other individuals having difficulties with losing weight and curbing hunger. A double-blind study of 12,000 people over a five-year period uncovered an increased risk of developing cancer. That prompted the U.S. Food and Drug Administration to recommend that the pharmaceutical company withdraw all Belviq and Belviz XR (lorcaserin) from the market.