I just picked up Wellbutrin 150 mg today. There's 14 tab, My doctor wanted me on 150 for two weeks and then she plans to double the dose to 300 mg I believe. I took my first pill today and I actually feel decent. I'm not upset or feeling depression and I feel clear headed. I don't have headaches or crave cigarettes. But my back aches and my neck feels stiff and it makes me feel kind of weak which makes me feel uncomfortable. If she doubles the dose will the back pain get worse? Are there any ways to help with it? I don't want to switch to a different antidepressant. Also I kind of want to exercise and lift weights again but i'm concerned because my back and the weakness I feel that I could damage myself physically.Is this possible?