Effexor is distributed in pentagon-shaped peach-colored tablets of 25 mg, 37.5 mg, 50 mg, 75 mg, and 100 mg. There is also an extended-release version distributed in capsules of 37.5 mg (gray/peach), 75 mg (peach), and 150 mg (brownish red).

Venlafaxine Extended Release (XR)

Venlafaxine extended release is chemically the same as normal venlafaxine. The extended release version (sometimes referred to as controlled release) controls the release of the drug into the gastrointestinal tract over a longer period than normal venlafaxine. This results in a lower peak plasma concentration. Studies have shown that the extended release formula has a lower incidence of patients suffering from nausea as a side effect resulting in a lower number of patients stopping their treatment due to nausea.

Generic

Generic venlafaxine is available in the United States as of August 2006 and in Canada as of December 2006. A generic form of the extended-release version is available in Canada as of January 2007 and will become available in the United States in 2010.

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