Performance Enhancing Drugs

Sha'Carri Richardson, who won the 100 meters at the U.S. Olympic Track & Field Trials, tested positive for THC and accepted a one-month suspension from competition. Officials declined to offer her a relay spot.

In a New York Times report, McNeal said she missed an out-of-competition drug test while recovering from an abortion.

The world's most widely used drug boasts some powerful benefits for runners.