Please talk to your oncologist about your side effects! There are options, like switching to one of the AI hormone blockers or reducing your dosage of Tamoxifen. I started taking 10 mg (half-dose) of Tam on Jan. 1st & I'm doing ok so far. I'm 72. Many people have to switch meds or dosages initially, before finding the right balance. Please reach out to your medical team & advocate for yourself! Sending best wishes!