Nine months after smashing the women's marathon world record, Ruth Chepngetich was provisionally suspended from the sport following a positive doping test that casts doubt on her 2024 Chicago Marathon run.

Ruth Chepngetich, the marathon world record-holder, tested positive for the banned diuretic HCTZ in a urine sample collected on March 14, 2025. After an internal investigation, Chepngetich voluntarily accepted a provisional suspension on April 19 while the Athletics Integrity Unit continued its case.

Ruth Chepngetich, who set the world record at the Chicago Marathon in October, tested positive for a banned diuretic and masking agent in March.