Just a suggestion. I went through crippling knee pain and periods of bad hip pain after about 9 months on both Anastrozole and Prolia. Which to blame? I switched to Letrozole and started taking collagen supplements. I get the capsules on Amazon as they're easier than gummies or powder. My crippling knee pain quickly resolved. I started sleeping with a knee pillow to keep hips level. I found out the hard (but definitive) way that it was the collagen that made the difference rather than the drug switch. While still on the gummies, (biotin with collagen) I accidentally purchased some with only the biotin. My knee pain started to return until I started the capsules which ive been on since. I have mild osteoarthritis in my left knee, so I have occasional mild reminders, and my hips sometimes give me fits but eventually self-resolve.