I have been taking temaxafine for 3 years and my doctor has changed my medication to letrozole. After taking it for 1 month I had a lot of side affect like sore chest,heart pumping out of my chest,terrible night sweats,nightmares,sore ankle,exaustion, sore neck, sharp pain in the back of the neck if taking deep breath and feeling very unwell..Doctor wants to change my medication now to anastrozole. I would like to know what you think.Would I be better off to go back to temaxafine since the side effects were mimimul and ok?