Before revision:   We found  181 distinct DDI being prescribed concomitantly to almost 5 \% of the city population. We also discovered that women are at a 60\% risk increase of DDI when compared to men , while only having a 6\% co-administration risk increase.
After revision:  We found 181 distinct DDI being prescribed concomitantly to almost 5 \% of the patients in the city's public health-care system. Further, 4\% of the patients were dispensed major DDI combinations, likely to result in very serious adverse reactions and costs we estimate to be larger than previously reported. DDI results are integrated into associative networks for inference and visualization, revealing key medications and interactions. Analysis reveals that women have a 60\% risk increase of DDI when compared to men , while only having a 6\% co-administration risk increase.