I don't know why I'm worried, because a professonal gave me my medication... but I was on 150 MG of Wellbutrin, and I haven't taken the past two nights, now the doctor switched me over to Effexor XR (75 MG). I don't know why, but I'm really worried something's going to happen to me. I'm also on Xanax. She put me on the Effexor, which I understand isn't approved for teenagers, because I'll be eighteen late next month. Someone please calm my nerves.