Oh dear have just started letrozole - was told is best AI. Think already a few signs of joint pain. Have osteoporosis due to have Prolia injection Friday hope it prevents bone fracture as know this drug thins bones. No other symptoms as yet but been thru menopause twice plus in this weather might welcome a hot flush. Chemist recommended panadol osteo and can use continuously and has clients on L already using it. Medical onc recommended fish oil.Have friends with arthritis rapt with turmeric/curcumin is anti-inflammatory. Several ladies on this blog says settles but can take awhile 12 months for some also if intolerable can be switched to another AI. Value of gentle exercise/ walking strongly recommended. Have a look old posts here using search bar - powdered magnesium strongly recommended as well as Calcium/vitamin D. God bless, good luck try hang in there - might be tough for a bit but others have done it so am going to try