I have been taking arimidex since August 2008 following mastetomy and chemo therapy. I have had mild joint and muscle pains for about 4 months and now have a recurrence of atrial fibrillation which is distressing as i thought the problem had gone since I had completely recovered from stress and exhaustion over 4 years nursing elderly parents. I am 70 years of age and dislike intensely taking loads of medication as it is completely alien to my charmed life of excellent health and energy.
Polly, Arimidex is stil quite new, and all the data certainly isn't in on it yet. There's some preliminary information that it may indeed cause atrial fibrillation. Unfortunately, you'll have to choose between Arimidex's proven ability to help prevent cancer recurrence, vs. the discomfort (emotional and physical) of your fibrillation. Not a happy choice, I know. Please speak to your doctor about this, and see if any further research has been done about perhaps controlling this unfortunate side effect. Having cancer does indeed rob you of your robust health; but I hope it doesn't rob you of your hope in the future, as well. Life is STILL good - just different. Good luck - PJH