My hair grew back post chemo and lasted through femara and arimidex. After about 18 months I changed to tamoxifen because of side effects of the first two. About 6 months later my hair started falling out. My oncologist said it was probably because of the tamoxifen but it may not grow back. I stopped the tamoxifen for 3 months, but had no improvement. Now another 3 years on, I have resigned myself to losing my hair gradually. I couldn't be bothered wearing my wig or a hat. It is too hot with the inability of my body to regulate its temperature properly.