Anxiety drugs may lead to behavior changes in fish. The bigger concern is that despite our best efforts many pharmaceuticals are making their way into our drinking water. At least tap is still cleaner than bottled water.
http://www.nytimes.com/2013/02/15/sc...f=science&_r=0
Interesting look into the evolution of human genes.
http://www.nytimes.com/2013/02/15/sc...ml?ref=science