Belviq Side Effects

Clinical studies have shown that Belviq can cause side effects, such as headaches, nausea, and dizziness. While these common reactions tend to be mild and easy to treat, there are some potentially serious problems that may require immediate medical treatment. Let your healthcare provider know right away if you experience complications like blurred vision, confusion, or problems breathing.

An Introduction to Belviq Side Effects

Just like any medicine, Belviq® (lorcaserin) can cause side effects. However, not everyone who takes the medication will have problems. In fact, most people tolerate it quite well. If side effects do occur, in most cases, they are minor and either require no treatment or are treated easily by you or your healthcare provider.
 
(This article covers many, but not all, of the possible side effects with Belviq. Your healthcare provider can discuss a more complete list with you.)
 

Common Side Effects of Belviq

Belviq has been studied extensively in clinical trials. In these studies, one group of people received the real medication, while another group received a placebo (a "sugar pill" that does not contain any active ingredients). As a result, it was possible to see what side effects occurred, how often they appeared, and how they compared to the placebo.
 
In these studies, the most common side effects of Belviq included:
 
  • Low blood sugar levels (hypoglycemia) in people with diabetes -- in up to 29.3 percent of people
  • Headache -- up to 16.8 percent
  • An upper respiratory tract infection -- up to 13.7 percent
  • Symptoms of the common cold -- up to 13 percent
  • Back pain -- up to 11.7 percent
  • Nausea -- up to 9.4 percent
  • Urinary tract infection (UTI, such as a bladder infection) -- up to 9 percent
  • Dizziness -- up to 8.5 percent
  • Cough -- up to 8.2 percent
  • Fatigue -- up to 7.4 percent
  • Diarrhea -- up to 6.5 percent
  • Constipation -- up to 5.8 percent.
 
Other common side effects, occurring in 2 percent to 5.8 percent of people, included:
 
 
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Belviq Medication Information

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