 Leading up to the Summer Olympics , Solo received a public warning from the U.S. Anti @-@ Doping Agency ( USADA ) after a June 15 urine test concluded the banned substance Canrenone had been detected . Solo said in a statement she had been prescribed a pre @-@ menstrual medication and was not aware it contained any banned substances . She cooperated with the USADA and provided them with the necessary information to prove that it was a mistake . Her story checked out and she was cleared with a public warning . The positive test did not require Solo to withdraw from any pre @-@ Olympic matches . 
