South Africa's Daryl Impey has been cleared of doping and hopes to race in September's World Championships.
But a hearing ruled he had taken the banned diuretic through a contaminated product bought at a pharmacist.
"I was confident in my defence and I'm thankful that I was given the chance to clear my name beyond any doubt," the Orica-GreenEdge rider, 29, said.
|Daryl Impey factfile|
|Born Johannesburg, December, 1984|
|Played football before taking up cycling in 1997 with his brother and dad|
|Signed his first professional contract in 2003 for the Microsoft Cycling Team|
|His best win to date has been the 2009 Tour of Turkey|
|Described wearing the yellow jersey at the 2013 Tour as "a dream realised"|
The hearing, held in Johannesburg on Thursday, accepted Impey's defence that a pharmacist had contaminated gel capsules with Probenecid which can be used as a masking agent and is not a performance-enhancing drug.
Impey, who was forced to miss this year's Tour de France, added: "I am hoping to return back to racing now, and hopefully compete before the World Championships in September.
"I re-iterate my stance against doping and I will continue to race clean throughout my career. Right now, I am just really happy that I can be a bike rider again and do what I love the most."
Impey is expected to be back in action in the Canadian one-day races in Quebec and Montreal on 12 and 14 September.
The World Championships are being held in Spain from 20-28 September.