Effexor, manufactured by Wyeth Pharmaceuticals, is an antidepressant prescribed for the treatment of depression, generalized anxiety disorder, and social anxiety disorder, among other major depressive disorders. Effexor is among a class of drugs known as SSRIs (selective serotonin reuptake inhibitors), which work by increasing the levels of serotonin in the brain. In 2006, the FDA issued a warning to doctors that only small doses of Effexor should be prescribed to patients, as the drug posed a high risk of overdose, often leading to death. Symptoms of overdose include elevated heart rate, sleepiness, coma, seizures, dilated pupils, and vomiting. Effexor overdose can cause slow heart rhythm, low blood pressure, vertico, and muscle and liver cell death. If you or a loved one has suffered an overdose or other injury while taking Effexor, the experienced attorneys at Gunn Law Group offer a free review of your product liability case.