Switching from Exemestane to Tamoxifen


I switched from Exemestane (which I was on for 5 years) to Tamoxifen in January 23. This weekend I’ve started with a period (first one since before treatment) and it’s been so bad. It’s been a lot heavier than my periods were before treatment. Will it continue like this monthly? The thought of having heavy periods like this is really getting me down. 


Hello White84 

Thanks for posting asking about the bleeding you have had at the weekend. It’s understandable the thought of this is getting you down. 

You explain being on exemestane for 5 years and were switched to tamoxifen in January. Exemestane is only prescribed in women who have passed the menopause, whether this is a natural menopause, treatment induced or from ovarian suppression . Unless you also stopped ovarian suppression treatment when you switched to tamoxifen it’s not clear why you would now be having periods. 

A less common side effect of tamoxifen is that it can affect the lining of your womb, so it is important to contact your treatment team to explain that you have had some unusual vaginal bleeding. If you have been discharged do make an appointment with your GP to talk this through. 

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