https://phys.org/news/2018-11-drug-pollution-stream-bugs-predators.html

Emma Rosi, an aquatic ecologist at Cary Institute of Ecosystem Studies and a coauthor on the paper, explains, "Stream life is swimming in a mixture of pharmaceuticals. Our study is the first to show that this chronic drug pollution can concentrate in aquatic insects and move up food webs, in some cases exposing top predators to therapeutically-relevant doses."

Surveying pharmaceuticals in streams