[Don W]

I'm sorry about your problems. I don't have much medical information but, I do have experence being an alcoholic and recovering. The problem here, to me is your parents. They are what we call enablers. I'd suggest you try and get them to seek help. Like alanon helps those affected by alcohol, I'm sure there is a support group for you. I'm afraid that as long as your parents continue to allow and clean up this behavior will continue. I'd guess they might blame themselves for her problems and feel it's their responsibility to fix it. The help is also suggested for you. Your sister is an adult and responsible to seek help. You and your parents are responsible for your help and recovery. I can tell you that alcohol had me doing the many things your sister is doing.
There is hope, as you can tell by the people here in mental health. I'm being treated for PTSD and there is medication. however, medication isn't a magic cure. A program of counseling and medication is what works for many. This won't be easy but, she won't be helped, until you and parents learn how to let go and let God. Please keep in touch. We're here to listen and encourage. There are many with experence in this on Mental Health Board. Mine are only suggestions, others may offer different path.