I am 71. If you do research on internet lots of information on lower dosages. Research now indicates 5 mg a day or 10 mg (tamoxifen)every other day have exactly the same results with far less side effects and is widely prescribed. I myself had a very small tumour, (lumpectomy), no cancer in lymph nodes and 5 days radiation. I am only taking 5 mg a day. At my age, quality of life means everything. I will not spend the next 5/10 years suffering like so many other women do on this drug. Please do the research.