Please explain what happens after taking cancer tables for 5 years?

U mean tablets?: If you mean pills like tamoxifen of aromatase inhibitors, data shows there is a beneficial effect that lingers even after the pills are stopped. However, more recent data shows that 10 years of tamoxifen provide a better protection than 5, so many patients are being kept on therapy for longer. There are other factors involved, so it's not a cookie cutter deal. Good question.