Maybe this is why there wasn’t much hoopla when it happened? FYI, this is a possible masking agent
Blockquote
The Athletics Integrity Unit (AIU) has provisionally suspended marathon
world record-holder, Ruth Chepng’etich, for the Presence and Use of Hydrochlorothiazide
(HCTZ) relating to a sample collected from her on 14 March this year.
A Notice of Charge has been issued against Chepng’etich regarding the detection of the
Prohibited Substance – a diuretic – following an investigation into the Kenyan athlete’s positive
test which was reported to the AIU on 3 April this year, at an estimated concentration of 3800
ng/mL in urine.