I started taking Wellbutrin XL 150mg yesterday. Since then I have been feeling more positive but mellow and sleepy and my appetite is normal. I am not feeling the effects everyone feels on it such as jitteriness, motivation, splurge of energy, suppressed appetite I almost feel like I haven't taken anything. It is a generic brand so I'm wondering if this honestly makes a difference.

Should I give the medication time to finally kick in?