Though I would suggest rehab, you can always do what I did for alcohol and go to the hospital for a rapid detox. It took three days and they kept me asleep the whole time so I didn't feel discomfort. I never went to a rehab program but it's been 6 months and I'm still sober.

Dx: BP2, PTSD, bulimia/anorexia
Risperdal 4mg
Trileptal 300mgs
Buspar 45mgs
Ativan 1mg PRN
Vyvance 70mgs PRN