Hi MSD, I was on Tamoxifen for 2.5yrs before I was switched over to Arimidex as my blood tests for hormone levels were showing I was post-menopausal. I was only on Arimidex for a month when I had a similar situation; bleeding + usual period symptoms, although the bleeding was only for 1 day. My oncologist decided to put me back on Tamoxifen in case I wasn't actually post-menopausal (apparently there can be fluctuations in hormone levels that can give false blood test readings) for a further 6 months and then reassess. She also sent me for a pelvic ultrasound (for the reasons Tonya set out) and thankfully these results were clear. I'm also to see my gynaecologist in a week or so to check everything is OK - hopefully this is just over-caution on my oncologist's behalf! So, have been back on Tamoxifen now for a couple of months and no further bleeding at present, so who knows, it may have just been my body adjusting to the new drug but my oncologist felt it was better for me to go back to Tamoxifen in case. Hope this helps. Jane xx
