Here's the detail from the Telegraph story
Dr Brian Lipworth, of the Scottish Centre for Respiratory Research, said he believed there was “no scientific reason” why a drug like triamcinolone would be performance-enhancing.
“An anabolic steroid like testosterone puts on muscle mass but this is a catabolic steroid which breaks down muscle,” said Lipworth . “The benefits to David Millar were probably the fact that he was cheating by taking EPO and testosterone at the same time as he was using triamcinolone.”
Ian Pavord, a Professor of Respiratory Medicine at the University of Oxford, said he too doubted injected triamcinolone could help athletic performance as it would “reduce proximal muscle mass”.