SAN ANTONIO (EGMN) - Breast cancer patients who took the antidepressant paroxetine during their course of tamoxifen therapy were up to 91% more likely to die from their disease than were those who did not take the two drugs together, according to a retrospective, population-based cohort study conducted in the Canadian province of Ontario.Investigators used health card identification numbers to track women aged 66 years and older who were treated with tamoxifen for breast cancer between 1993 and 2005....