1st period in 12mths really heavy..on tamoxifen

Hi Ladies
Have not posted for some time. I started my first period after stopping for a year with treatment. Anyway question is ,its so heavy,I’m changing super size tampax every 20mins since Thurs morn and its flooding through even then. Should I call my Dr or just see how next couple days go? I was heavy before chemo but not anything like this.
Thankyou for any advice . I am on Tamoxifen but don’t want to over react by calling Gp if i dont need to.

Hi Debs-

Sorry you haven’t had any replies yet, maybe you could call our helpline which re-opens on Tuesday morning.  The freephone number is 0808 800 6000 and normal hours are open Monday to Friday 9.00 to 5.00 and Saturday 10.00 to 2.00.

Best wishes

June, moderator


I was exactly like you. No periods for a year, then the period from hell. I ended up being anaemic, so definitely worth speaking to your GP. I know they can give you a drug to stop/slow the bleeding. But you also need to speak to GP/specialist, as Tamoxifen can cause thickening to the womb lining, and they may want to keep an eye on things.

I ended up having an ultrasound which showed thickening and polyps. So then had a hysteroscopy, which found it was nothing sinister. But I am still being checked regularly by the gynaecologist. They like to air on the side of caution, with any bleeding. Even if they/we think it’s just our periods returning.

Good Luck, I hope the bleeding eases soon. Mine lasted about 5 days, and ended with lots of clots. Sorry if that’s too much information! Xx

Thank you all for your answers,I appreciate them. I ended up calling my Dr as the blood loss was ridiculous. He said it was too early to know if it was a period or a problem and to see if the blood loss slowed down in the next 5days!!! He said to get help if in the mean time I went dizzy or fainted!! I ended up having the runs with it Fri night which is out of the norm for me. As it stands I’ve been feeling ill and weak with it. Today(Sunday) the bleeding is going between regular and heavy on and off. I have a routine oncologist appointment on Tuesday so will mention it to him.
But I must say the way I was bleeding on Thurs and Friday I couldn’t of gone on another 5days like! At least I’m getting a little rest inbetween at the moment. X