British Boxing Board of Control secretary Robert Smith has branded Tony Thompson's comments that all sportsmen should be allowed to take drugs as "mindblowing".
The American heavyweight, who faces Britain's David Price in Liverpool on Saturday, claims drug use in sport has become so widespread the only way to deal with the problem is to legalise doping.
Smith insisted Thompson "doesn't seem to understand British culture" and said: "It's mindblowing that a fighter who has challenged twice for the world title can come out with something like this.
"I felt sickened, to be honest, when I heard the comments.
"People are entitled to their view, but yesterday the Boxing Board held a UK Anti-Doping seminar at the Institute for Sport in Sheffield for all the UK licence holders - managers, promoters, trainers - outlining the dangers of drugs, and how it is being tackled in sport."
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