Do not self medicate. It is not a good idea to take these two medications together without active supervision by a doctor. This is not a good issue for self medication. Please consult your doctor.
Yes. if you have reached the maximum dose of effexor (venlafaxine) or effexor (venlafaxine) xr and still have symptoms of depression mediated by nor epinephrine then augmenting with wellbutrin is an appropriate choice. the key is what symptoms remain. that's how your physician determines the appropriate medication to add.