I don't know what else to tell you. I am not telling you to do or not do things. It's your life and it's your choice.
But you said she doesn't answer your calls and doesn't return them, either. You can keep calling or e-mailing her if you want to but from what you tell us the result you will get is the same. So what is the difference?
What is more important is, if she is really driving illegally with alcohol in her system or while being on the strong medication like you say, I think you should call the police as soon as possible before she seriously injures or kills other people (and herself)!!!
