Anxiety, body aches, cold sweats, confusion and painful urination are some of the more common side effects of lorcaserin, the active ingredient in Belviq, notes Drugs.com. People who take the drug may also suffer from less common side effects such as joint pain, rapid weight gain, bloating and trouble with breathing or sleeping.
People who take Belviq and have serious side effects such as feelings of extreme joy or sadness, thoughts of suicide, fast or uneven heartbeats, low blood sugar, or swelling in the hands and feet should stop taking the drug immediately and contact a health care professional, states Drugs.com. People may suffer from complications if they take Belviq in conjunction with other medications, such as antidepressants, migraine drugs or narcotics. People who experience abdominal or stomach pain, a false sense of well-being, or are seeing, feeling or hearing things that are not there may be suffering from an overdose of Belviq.
Doctors use Belviq together with a regimen of diet and exercise to treat patients who are obese, states Drugs.com. The active ingredient in Belviq, lorcaserin, affects the chemicals in the brain that control appetite. While doctors prescribe the drug to people who have underlying conditions such as diabetes or high blood pressure, the drug does not treat these conditions.