yes I understand I was on matrifen 100 then changed to Sandoz plus oc80 as a fall back this is well suited
You have to ask he doctor. There are oral opiates that may help her absorb, but if she is old and infirm, then transdermal is the right way to go.
But make sure someone takes a look at the patches -- maybe a bad batch.
I'm on another forum where people believe the newer matrix type patch works better than the old gel kind, but there maybe absorption problems! Your mother may not be unique in this way.