Doping

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hippy in reply to @n/a

I know about the Yates case, I was posting as an example of the higher prevalence of asthma in elite athletes.
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gbj_tester in reply to @n/a

No threshold limits currently exist for terbutaline.

This came up during Yates' trial-by-forum, AFAIK WADA are sponsoring research into the pharmacokinetics in order to determine an excretion threshold which would correspond with normal therapeutic use. A TUE specifies the permitted dose, so exceeding that is already doping, it's just hard to prove until there's solid science to correlate urinary excretion with dosing.