Effexor XR (extended release) by Wyeth Pharmaceuticals Inc. is the 6th best selling prescription medication in the U.S according to Drug Topics' Top 200 Brand Name Drug by Retail Dollars in 2006.
It has been approved to treat major depression, panic disorder, generalized anxiety disorder and social anxiety disorder. Effexor XR is taken once a day and comes in three strength 35.7 mg, 75 mg and 150 mg.
Effexor (Venlafaxine) is an antidepressant of the serotonin-norepinephrine reuptake inhibitor (SNRI) class and has been in use since 1993. It works by blocking the transporter "reuptake" proteins for key neurotransmitters affecting mood thus leaving more active neurotransmitters in the synapse. The half-life of venlafaxine is short and patients can experience withdrawal symptoms after having missed a single dose.
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