Effexor XR? Information on Efexor XL is a common variation and misspelling of Effexor XR.
Effexor XR is a drug that is used to treat depression and anxiety disorders. Oftentimes, drug companies attach XL to the end of a drug to indicate that it is an extra-long strength. However, in the case of Effexor®, Wyeth (the manufacturer) attached an XR, meaning it is an extended release medicine. Therefore, there is no Effexor XL.
(If you would like to read more about Effexor XR®, click Effexor XR.)