I'm on anastrozole, but yes, used to be very regular. Also had a few days of diarrhea. This seems to be one of the side effects that comes and goes, swinging between constipation and loose stool. I take a probiotic daily and if needed ginger tea with probiotic in it already. Bigalow makes a good one, just before bed. MiraLax is an effective and benign choice too.

I have been taking Letrozole for 9 months now. I have chosen it as my only treatment for stage 4 bc in my bones. It shrunk the tumors and now I am in remission without new growth or mets, but I have noticed in the past month a change in bowel habits. I am constipated and bloated followed by diarrhea. I was camping and riding in the side by side this past weekend with my husband when I started having stomach cramps and had to find a bathroom quick! I have been home the past couple of days and today is the same. The only constant is the Letrozole.