Post menopausal Tamoxifen

Am confused as I am definately post menopausal (had hysterectomy and ovaries removed tears ago) but am precscribed Tamoxifen.

Hi Dolphin, I’m 53 but had early menopause 10 yrs ago and I’m on Tamoxifen. I read somewhere that after the menopause your fat cells still make oestrogen but don’t know if this is true x