World champion Steve Mullings has confirmed he has tested positive for the banned diuretic and could now face a life ban from athletics.
Mullings, who won gold in the Jamaican 4x100 relay team at Berlin in 2009, tested positive for the substance at the Jamaican national trials in June and was left out of the country's team for next weeks world champs in South Korea.
The 'B' sample, which was tested in Montreal, had also come back positive.
Furosemide is on the World Anti-doping Agency's banned list because it could be used as a possible masking agent for other drugs.
Mullings now faces a possible life ban from the sport after he was banned for two years in 2004 for excessive levels of testosterone.
