Kenyan marathon star Ruth Chepngetich, the current women’s marathon world record holder, has been provisionally suspended by the Athletics Integrity Unit (AIU) after testing positive for a banned substance. The AIU announced that hydrochlorothiazide (HCTZ), a diuretic prohibited under the World Anti-Doping Agency (WADA) code, was detected in a sample collected from the 30-year-old athlete on 14 March 2025.
Chepngetich made headlines in October 2024 when she shattered the women’s marathon world record by finishing the Chicago Marathon in an astonishing time of 2:09:56, breaking Ethiopian Tigst Assefa’s previous mark from the 2023 Berlin Marathon by nearly two minutes. Her performance was widely celebrated as one of the greatest achievements in marathon history, drawing global acclaim and placing her among the all-time elite runners.
However, the detection of HCTZ, which is commonly used to treat hypertension and fluid retention and more controversially, as a masking agent to conceal the presence of other performance-enhancing drugs, has cast a shadow over her record-breaking feat. According to WADA rules, HCTZ is banned at all times due to its potential to distort drug testing results. Chepngetich’s urine sample reportedly contained 3,800 nanograms per millilitre (ng/mL), far exceeding the WADA threshold of 20 ng/mL.
Although the AIU initially refrained from suspending Chepngetich following her notification on 16 April, she voluntarily accepted a provisional suspension on 19 April while the investigation proceeded. On 4 July, the AIU issued a formal notice of charge and imposed its own provisional suspension, marking a significant development in the ongoing case.
AIU head Brett Clothier emphasized that the investigation has been comprehensive and that the decision to suspend her reflects the seriousness of the doping violation. The case now moves into the adjudication phase, where Chepngetich will have the opportunity to respond to the charges and present her defense.
This development is a major blow not only to Chepngetich’s career but also to the integrity of elite marathon racing. If found guilty, she faces the possibility of a multi-year ban and the annulment of her world record and recent titles. The AIU and global athletics bodies remain firm in their stance on anti-doping, reiterating their commitment to fair competition and athlete accountability.
Ruth Chepngetich, a former world champion and Olympic finalist, had been considered a symbol of Kenyan athletic excellence. Her future in professional running now hangs in the balance as the athletics world awaits the outcome of the case
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