Retired sprinter Nesta Carter avoided the maximum punishment for a second doping violation on Wednesday when Jamaica's Independent Anti-Doping Disciplinary Panel handed him a four-year ban for the use of the banned drug Clomiphene.

Carter, who won four world championship relay medals for Jamaica before retiring earlier this year, faced an eight-year ban after testing positive for the testosterone-boosting substance in an out-of-competition test in March this year.

"Medication prescribed for me while out of competition in February 2021 to manage an ongoing medical condition, contained Clomiphene," Carter said after the verdict was made public on Wednesday.

Carter previously served a three-month ban in 2017 as the result of a positive test for the stimulant methylhexaneamine in a retroactive test of a sample taken at the 2008 Beijing Olympics.