I hope some of our members who have changed from one to the other will let you know how they got on soon but if you don't hear back from anyone in the next day or so it may be worth having a look for some discussions you can join via the 'search forum' option in the purple bar above. You could also see if the Breast Cancer Now community can help.
If you have any questions about Arimidex and/or Letrozole, our cancer nurses are just a phone call away on 0808 800 4040, Monday - Friday between 9a.m - 5p.m.
I'm sorry I can't be of more help but I hope you're able to get the information you're seeking soon.
