I just switched from Bupropion XL 150 mg to 300. I took this in 2006 but I don't know if it was the name brand or the generic. Does anyone know when the generic was first release?

Also, how soon should I expect to notice a difference in the the effects of the dosage. On 150 I felt ok, but my level of motivation is extremely low and I have significant food cravings that I'm hoping to diminish. I was in a very dark place with extreme anxiety and depression in July so I started on Lexapro 10 mg and then added the 150 Wellbutrin a month later. I see a difference in the anxiety for sure (no more chest pains, panic attacks, feeling of being overwhelmed, shortness of breath... it was miserable!), but I still don' think I'm where I should be. Any responses are appreciated...