Otago cyclist Mark Spessot has been banned for two years after testing positive for two prohibited substances.
The veteran cyclist tested positive for prednisone and terbutaline following the Twizel to Timaru cycling race in September 2015.
He will be excluded from participating in any sport bound by the World Anti-Doping Code from the date of testing - September 19, 2015.
The two substances are commonly used in the treatment of asthma.
Spessot used the substances to "alleviate the symptoms of my asthma''.
He had previously been prescribed a short course of prednisone tablets to use at his discretion and a flare up of his asthma had coincided with the Twizel to Timaru cycling race.
Mr Spessot was not required to apply for therapeutic use exemption before the event but failed to seek clarification around the use of the substances.
Because he self administered the substances without medical consultation at a later date, he was not entitled to apply for retrospective therapeutic use exemption.
The Tribunal stated Spessot's actions "were casual and unthinking and that is not consistent with the clear obligations on every athlete''.
"They were taken legitimately for genuine medical reasons, but the obligation on all athletes to be drug free is given praramountcy under the Code.''
