Nairobi, Kenya – July 18, 2025 : Kenya’s world marathon record-holder Ruth Chepng’etich has been provisionally suspended by the Athletics Integrity Unit (AIU) after testing positive for Hydrochlorothiazide (HCTZ), a banned diuretic listed under the World Anti-Doping Agency (WADA) Prohibited List.
According to the AIU, a urine sample collected on March 14, 2025, showed an HCTZ concentration of 3,800 ng/mL — significantly above the WADA threshold of 20 ng/mL.
“Chepng’etich was notified and interviewed in Kenya on April 16 and complied with all procedures,” said AIU Head Brett Clothier.
Read the official AIU announcement
More on HCTZ and banned substances
Provisional Suspension Imposed After Detailed Probe
While a provisional suspension was not immediately required, Chepng’etich voluntarily accepted suspension on April 19, 2025, pending a formal hearing. The AIU formally issued a Notice of Charge on July 18 after a thorough investigation.
She now has the right to defend herself before a Disciplinary Tribunal, which will decide on potential long-term sanctions.
“The AIU will not provide further comment until the disciplinary process is complete,” the statement read.
Who Is Ruth Chepng’etich?
Chepng’etich is one of Kenya’s most decorated marathoners, holding the women’s world marathon record and previously winning major races in Doha, Chicago, and Istanbul.
Her suspension is a major blow to her legacy and raises new concerns about the credibility of Kenyan long-distance athletics.
Related: Ruth Chepng’etich breaks world record
What Is Hydrochlorothiazide (HCTZ)?
HCTZ is a commonly prescribed diuretic used to treat high blood pressure and fluid retention. However, in athletics, it is prohibited at all times because of its potential to mask performance-enhancing drugs.
According to WADA, such substances can hide the presence of steroids or other PEDs, making it difficult for anti-doping tests to detect abuse.
Doping Crisis in Kenyan Athletics
Chepng’etich’s case is the latest in a growing list of Kenyan athletes suspended or banned over doping. Kenya remains on WADA’s Category A watchlist, reserved for nations considered high risk.
“The repeated infractions are deeply concerning,” said a senior official at the Anti-Doping Agency of Kenya (ADAK).
Related: Why Kenya faces WADA scrutiny
Related: ADAK and Kenya’s anti-doping fight
What Happens Next?
The outcome of Chepng’etich’s disciplinary case could take weeks or months. If found guilty, she faces a potential multi-year ban, which may mark the end of her career.
For now, she remains provisionally suspended and barred from all competitions.
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