Research shows improved outcomes with some drugs at higher doses or for a longer period . should only take tamoxifen for five years after they 've had tumors surgically removed . One drug , however , fails to show promise as treatment for triple - negative breast cancer . ` ` Chemo brain '' actually begins before chemotherapy does , according to one study .
Research shows improved outcomes with some drugs at higher doses or for a longer period . One drug , however , fails to show promise as treatment for triple - negative breast cancer . ` ` Chemo brain '' actually begins before chemotherapy does , according to one study .