Tamoxifen and periods

I have been on tamoxifen for 20 days and had a period.  Has this happened to anyone else?  


Hi pinkcamellia

Welcome to the BCC Forum.  I wondered if more people might see your question if you posted in the section "Going through treatment/hormone therapy ".  I’ve attached a link:


You might also find out factsheet on Tamoxifen helpful.  Here’s the link:


Very best wishes


BCC Moderator

hi Pinkcamelia,


Yes. I have also been on tamoxifen for about 22 days and my period started on Saturday. It was a week late but I wasn’t expecting to have one.