Hi Middle-aged girl welcome to the forum. I’m sorry I didn’t reply earlier as I thought maybe a person in recovery would give you better advice.
I’m a mum like you, my son is 27 and has alcohol and cocaine addictions. When he reached out for help, he went to doctor for help first.
If its any help, I had an elderly relative who got all the detox stuff prescribed by hospital, but completed it at home with a close relative living there and helping and recording the doses etc. It took about 3 weeks I think.
Every case is different I guess though. At least she has you to help her, it’s difficult and an emotional rollercoaster, but it’s a means to an end.
Take care of yourself through this, you need to be strong.
Always here to chat,
Lx