Dawn Harper-Nelson, who won gold in the 100m hurdles at the 2008 Olympics and silver in 2012, is getting a three-month doping ban from the U.S. Anti-Doping Agency. The IAAF collected the sample in December. The positive test was for hydrochlorothiazide, and USADA says that it "has accepted Harper-Nelson's explanation that her positive test was caused by a blood pressure medication she was prescribed by a physician to treat hypertension."

Hydrochlorothiazide is a diuretic. Harper-Nelson's ban began December 1, meaning she could return in March for U.S. indoors if she so chooses.

Harper-Nelson, who was eliminated in the semis at the Olympic Trials this summer, wrote on Twitter that her positive was caused by treatment during an emergency room visit for high blood pressure.

Personal Statement... pic.twitter.com/goIkEf8PiP

— Dawn Harper-Nelson (@DHarp100mH) February 7, 2017