If you are really worried, and really serious about getting her help and you can't get her to do it on her own I have one resource to share. There is something called the Marchman Act. You can have her involuntary hospitalized for assessment. If they think she needs rehab she will be given the option and strongly advised to stay. But, they can't force her. So, if this is something you'd like to know more about than write to me.
Good luck to you and your family.
Is your wife willing to get some help? Unless she is ready there isnt anything you can do except get some help for yourself. I know that doesnt make you feel any better but it is the facts. Check out some Alanon in your area if you can. Addiction affects the whole family. Lock up your meds so she doesnt have access to them. As for the sex thing.......when we are actively using we dont have a sex life. The pills take that away. Dont be to hard on yourself in that area. Most of us here could of cared less about sex during our use. The pills were our lover......Stick around here as we have others who are not addicts themselves but have loved ones who are and they have some great advice to give..........sara