I used to take glucosamine chondroitin for my ageing knees before BC, but stopped as for a short while I was on warfarin, due to some heart issues post chemo (not a good mix). As I am still on blood thinners, but not warfarin, I haven't gone back to glucosamine but take fish oil with my medicos' OK.
I have been on Femara for over 3 years and haven't had any pain, thank heavens, but was warned before starting that I might have arthritis type pain, particularly in the hands. As I already had a degree of peripheral neuropathy in my hands (worse in my feet) I wasn't thrilled but no side effects that I know of so far. I also take magnesium, vitamin B and D and calcium (all again suggested by medical staff). Shake me and I rattle, but no pain is no pain! Good luck.