She has used you can not take it right away .Kris I know you know this but just in case someone else reads it that does not know depending on the med there are diffrent amouts of time you need to be clean before you use sub .
I think you can take it as soon as you get the script. I think a waiting period only applys if you have used recently. I dont know a lot about sub, im sure someone here will be along to help soon. Good luck to you and baby. Luv, Jacky