I HAVE A FRIEND THAT HAS BEEN ON ANASTROZOLE FOR 5 YEARS. SHE WAS GETTING TO THE POINT OF BEING IN PAIN IN HER BONES, BACK, LEGS, ETC. HER DR SAID SINCE SHE HAS BEEN CANCER FREE FOR THESE 5 YEARS SHE COULD GO OFF OF IT. HAS BEEN OFF ABOUT 3 WEEKS AL OF A SUDDEN SHE IS EXPERIENCING VERY BAD PAIN IN HER NECK, HURTS TO MOVE HER HEAD AND TERRIBLE HEAD ACHES. SHE BEEN TO ER TWICE IN 3 DAYS. ER SAYS THEY HAVE TAKEN ALL THE TESTS THEY KNOW AND KEEP SENDING HER HOME WITH VICADIN AND IT DOESN T HELP AT ALL. MY QUESTION: COULD SHE BE HAVING WITHDRAWAL PAIN FROM BEING ON ANASTROZOLE THESE 5 YEARS AND GOING OFF ALL AT ONCE. I AM SO CONCERNED ABOUT MY FRIEND. THANK YOU FOR YOUR ANSWER. My email: YYYY@YYYY Sorry, I didn t know I wold have to pay. so sorry. I can t do that.