Hi @JacquiP, I too have rheumatoid arthritis and was put on Tamoxifen. I found the increased joint pain just way too much to cope with so my onc agreed that stopping it was best for me. I was peri-menopausal so I had an oophrectomy and, after I've had a knee replacement in August, I'll give Exemestane a go. If it doesn't work, I'll stop it and try something else.
I've found that being very clear with my medical professionals that quality of life is more important to me than quantity, has resulted in some really good outcomes. The ortho I saw about my knees wasn't keen to give a 41 year old a replacement but after explaining my position clearly (and looking at the MRI's), he got on board the "Make Jen's life better" train :) I'd really recommend this approach and if your doc isn't prepared to get on board, see if you there's another one that will!