Another night at the hospital

My 16 year old PDAer woke me in the middle of the night because of "cramps". Went to ER where she admitted to haven taken medication that can cause seizures...she had to stay the night. She also drank again and that's a toxic combination. Even if we don't give her money she will find ways to get stuff. Am at my wits end right now. We are supposed to go on holiday in a week and she still refuses to come along. Even doctors don't impress her much. What can I do with her? Not impressed much by laws or anything really.