Anderson Silva Add anti-anxiety medication to the list of things Anderson Silva tested positive for in conjunction with his UFC 183 bout with Nick Diaz. Silva (34-6 MMA, 17-2 UFC), who defeated Diaz via decision in the Jan. 31 pay-per-view headliner, initially failed an “out-of-competition” drug test on Jan. 9, when he tested positive for drostanolone metabolites and androstane . Silva passed a test on Jan. 19, but again failed both his pre- and post-fight tests on the night of the bout, which took place in Las Vegas.
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Anderson Silva also failed UFC 183 pre- and post-fight drug tests – MMA Junkie