I have been on tamoxifen since Dec 2018. I started with hives that seemed to be brought on by contact (my shirt, grocery bags, purse, etc). I am typically limited to itching now. I tried different allergy medicine and Zyrtec seems to work the best. I have not changed anything else in my life and assume it is either Tamoxifen or my breast implants causing it. My doctor did a blood test and it did not show any signs of allergic reaction.
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