Hello @ youngdogmum, this is an interesting question.
I don't really think there is a 'one size fits all unfortunately.'
My age @ diagnosis 41 yrs Jan '23
Stage 2 IDC & DCIS
HR+, HER2-
After 3 initial surgeries including mastectomy & implant reconstruction I was put on 5 years 20mg tamoxifen.
Due to severe side effects ie shut my brain down, I ceased treatment but had a dcis recurrence.
After 2 more surgeries,back on Tamoxifen 10 mg. It caused stage 4 endometriosis and extensive hemoragging & fibroids. Resulting in a hysterectomy & ceased tamoxifen.
Another recurrence 4 months later...this time 6 tumours on chest wall of non invasive papillary carcinoma.
After 2 more surgeries and radiotherapy..
Back on 5mg Tamoxifen until further notice...Time will tell what's next!
