Tamoxifen and periods?

Careninnj

I started tamoxifen a month ago. Im 43. My period was due 4 days ago, im definitely not pregnant, does tamoxifen stop menstruation?

Dmoore39

hello,

I started tamoxifen last year at 39. My cycles became irregular. I had some cycles where it was 40+ days in betweenand there was one that was only two weeks. My most recent period arrived last week after two months late and it has been back with a vengeance! All that to say, yes, it's normal for your periods to become irregular.

gb2115

Yes, it can. Mine changed within a couple months of starting tamoxifen. I read some statistic somewhere that 25% of the time it stops completely, 50% is irregular, and 25% no change. Not sure where I read it though.

annhkg

I have taken tamoxifen for 1 year, it was very regular before, but it come again 20 days after my last period, I have never experienced only 20 days in between. I am 38 this year.