MANILA – Ultimate Fighting Championship (UFC) light-heavyweight Chael Sonnen has failed a random drug test, causing him to be pulled out of the UFC 175 fight card where he was scheduled to face Vitor Belfort.
ESPN reported that Sonnen was randomly tested by the Nevada State Athletic Commission (NSAC) last month while in Las Vegas, and results showed the presence of illegal substances identified as anastrozole and clomiphene.
Addressing the issue on Fox Sports 1, Sonnen claimed that anastrozole and clomiphene were "perfectly legal substances."
"These are not performance enhancing drugs, these are not anabolics, these are not steroids of any kind," he said, as quoted by the UFC website. "It's very tough to be caught on these."
Sonnen explained that he needed to take those banned drugs after the NSAC made Testosterone Replacement Therapy (TRT) illegal.
"There is a transition period, and I couldn't have been more open or transparent about it… these are the medications you have to go on to lead a healthy life," said Sonnen.
According to ESPN, Sonnen was diagnosed with hypogonadism in 2008, a condition that results in a low level of testosterone. He had been previously allowed to use TRT, but the treatment was made illegal in Nevada in February.
"I had to take these drugs because they banned testosterone," Sonnen said.
The fighter said he will appeal the results of the drug test.