For my previous post on One Size Fits None, I did some digging (with the help of the Medical Anthroplogy community and a librarian at OHSU). I found a number of really interesting sources discussing the gender disparity in drug trials, and thought I'd list them here.
Since I do not have deep research in this area, I will decline in-depth comment. The upshot is, that although the NIH guidelines require "inclusion of women and minorities" - it is clear we have a long way to go.
Hayden, E. (2010) 'Sex bias blights drug studies' . Nature. 464, 332-333.