All five UFC 131 contestants who underwent testing for
performance-enhancing drugs and recreational/drugs of abuse at UFC 131
passed their tests.
Main-event contestants Shane Carwin and Junior Dos Santos, as well as UFC 131 winners
Donald Cerrone, Dave Herman, Nick Ring and Krzysztof Soszynski were
selected for testing. However, due to Carwin’s condition after his
hard-fought decision loss to Dos Santos, he was not required to provide a
sample.
The remaining five were all tested using the World Anti-Doping Agency’s international standard for in-competition testing.