https://blogs.mercola.com:443/sites/vitalvotes/archive/2004/02/17/Antibiotics-may-Increase-Breast-Cancer-Risk-.aspxWomen who took antibiotics for more than 500 days--or had more than 25 prescriptions--over an average period of 17 years had more than twice the risk of breast cancer as women who had not taken any antibiotics. Even women who had between one and 25 prescriptionsenCommunityServer 2008.5 SP1 (Debug Build: 31106.3070)