I am currently on TDM1 and due to finish in June. I’m also taking letrozole since last august. I’ve been blaming my muscle/joint pain on the letrozole but realise it could also be the TDM1 or both together. Anyway I spoke to GP last week and he’s started me on a new ish anti inflammatory tablet called Etoricoxib 30mg. The pain at night turning in bed and first thing in the morning has improved so much. I still have stiff fingers first thing but I can definitely feel my aches have lessened.
If you are suffering it’s worth asking your doctor about this drug
Best wishes
Hi Hmfm thanks for posting this, I'm sure people will find it useful. 
