Agreeing with some of the other posters...

I have bipolar II with depression/somnolence/lethargy that has been extremely difficult to treat. For my particular situation, Vyvanse is a fantastic drug. It gets me functional and coherent.

It's true that people with drug dependence issues should be wary of the stimulants as they can be addictive. Personally, I have been taking Vyvanse a long time, and I don't experience withdrawal if I don't take it. I just have a recurrence of the original symptoms I take it for, no worse than before.

The only thing I don't like about stimulants is that they really seem to burn up your energy while they're working, then leave you exhausted once they've worn off. Extended-release formulations such as Vyvanse and Adderall XR can help offset that problem.

Good luck!