I was taking the brand name Wellbutrin L and due to insurance limitations was given the generic brand. I felt horrible. I was irratable beyond anything I had ever experienced, I felt bad physically, forgetfullness, etc. So I purchased a one week supply of the brand name just to be sure and there is definately a difference. My problem is I can't afford the brand name and the generic I was taking had adverse affects. Is there a difference in the quality by manufacturers?