Pharmaceuticals cannot be effectively removed from water by waste treatment plants, making fish that live nearby particularly vulnerable to human drugs. New research is trying to understand exactly how fish are impacted by small amounts of anti-depressants like Prozac, Effexor and Tegrotol in their habitats.
Brian Bienkowski has written an in-depth story about these findings:
"Male minnows exposed to a small dose of the drug in laboratories ignored females. They spent more time under a tile, so their reproduction decreased and they took more time capturing prey, according to Rebecca Klaper, a professor of freshwater sciences who spoke about her findings at a Society of Environmental Toxicology and Chemistry conference last fall. Klaper said the doses of Prozac added to the fishes’ water were 'very low concentrations,' 1 part per billion, which is found in some wastewater discharged into streams."