Dry mouth, nausea, headache and dizziness are all side effects of taking Belviq, according to WebMD. Other side effects of the drug include constipation and tiredness. Patients should inform their doctors if these side effects worsen or persist.
Side effects of Belviq that may be serious include bruising, mood changes, abnormal breast milk production and enlarged breasts, explains WebMD. Other serious side effects include shortness of breath, twitchy muscles, swelling, unexplained fever and irregular heartbeat. Most people who take Belviq do not experience these side effects. Those who do are advised to contact the doctor as soon as possible.
Other effects of Belviq may depend on what the medication is used for, advises WebMD. Those taking the drug for the treatment of diabetes, for instance, may experience low blood pressure.This could indicate an adjustment is necessary, and patients are advised to contact the doctor immediately if seeing signs of low blood pressure such as blurred vision, dizziness, shaking or sweating. Males who have taken Bleviq may also experience a prolonged erection that lasts for four hours or more. If this occurs, a patient is advised to seek out emergency treatment. Serious allergic reactions to Belviq are rare, but they do occur. If a patient shows signs of a Belviq allergy, such as rash, trouble breathing or swelling, medical intervention should be sought immediately.