Hi, Nidarosa.
In this Camino there's two different parts, the portuguese one and the spanish one. There's several quite important cities where any medical attention can be found: Porto, Barcelos, Ponte de Lima in Portugal, Tui, Porriño, Pontevedra, Caldas de Reis, Padron and Santiago in Spain.
I suppose that a good help for you should be to have a note in spanish and portuguese with her medical treatments, as clear as possible. And to know which are the local medicines she can need.
If you can send me this medicines, I can ask to spanish pilgrims doctors how easy or difficult can be for you to obtain that medicines. And I can try it in Portugal, too. Just answering this topic (it sends me automatically an email)
Have a wonderful Camino,
Javier Martin
Madrid, Spain.