Hydrochlorothiazide Identified as Substance in Chen Xinyi’s Positive Doping Test

Photo Courtesy: Rob Schumacher-USA TODAY Sports


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Chen Xinyi, tested positive for hydrochlorothiazide according to multiple reports. Yesterday, reports indicated that the 18 year old Chinese swimmer had tested positive, though a substance was not named. It was also reported yesterday that Chen had taken her case to the Court of Arbitration for Sport.

Hydrochlorothiazide is listed on the World Anti-Doping Agency’s list of banned substances under “S5. Diuretics and Masking Agents.”

Chen finished fourth in the final of the 100 butterfly at this Games. She was also slated to swim the 50 freestyle this afternoon. It remains to be seen if she will be included in China’s 4×100 medley relay.

Previously, Chen finished sixth in the 100 fly last summer at the World Championships in Kazan, and she also won a gold medal for her prelims leg on China’s 400 medley relay at that meet. She won gold at the 2014 Asian Games in the 50 free, 100 fly and 400 free relay.

Read more from USA Today here.

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7 years ago

Former swimmer and pharmacist who thinks this is getting insane. EVERYTHING is banned for one reason or another. hydrochlorothiazide (or HCTZ) is one of the most commonly used medications for hypertension (seriously, it’s the 15th most prescribed medication in the US). I suppose it could be used to speed the process of elimination , but I don’t see how it could actually mask anything in a GCMS test.

Where does this stop? If we’re looking at legitimate medications of this level, it may be time to reconsider our stance on performance enhancing substances. You’re never going to stop it. NEVER! Biochemistry and chemists are far too tricky.

7 years ago

Here is a question,,,,are Birthcontrol pills and birth control devices banned?

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