Olympic 400m champion LaShawn Merritt positive for testosterone. The testosterone was in a penis enlargement product that he was taking. I am not sure if I would use that as my excuse!
http://www.theage.com.au/sport/olympic-champion-merritt-tests-positive-for-steroid-for-overthecounter-penis-enlargement-product-20100423-thc9.html
http://www.theage.com.au/sport/olympic-champion-merritt-tests-positive-for-steroid-for-overthecounter-penis-enlargement-product-20100423-thc9.html