Hi Tim
I've got Capsaicin. It works quite well, although I have nerve pain as well so it's difficult to tell which pain it is helping. It does smell quite strong but I've been quite impressed so I would definitely get her to try it.
My GP was happy to prescribe it. They can prescribe a stronger version I think. If she gets free prescriptions it'll work out cheaper.
Hope that helps - and she gets some relief from the pain.
Anne