I Am Just Starting Bupropion HCL ER (XL) I Am

I am just starting Bupropion HCL ER (XL) I am on ESCITALOPRAM for about a year with the help of Clonazepam as needed. I am suppose to wean my self off the Lexapro and only be on the Bupropion eventually, which drug do you feel is better. I just feel like a basket case lately so the Dr and I thought a switch might be good to try.