Effexor  is used to treat:

• Generalized anxiety disorder
• Major depressive disorder
• Panic disorder
• Social anxiety

When Effexor Should Not be Used

• Effexor should not be used in patients who are currently taking an Monoamine oxidase inhibitors (MAOI) due to the increased risk of serotonin syndrome.
• Allow at least 2 weeks between stopping an MAO inhibitor and starting of Effexor.
• Wait at least 1 week after stopping Effexor before starting an MAO inhibitor.
• Effexor should not be used in patients that have a history of mania, seizures, or kidney problems.