Sir Bradley Wiggins has appeared on BBC1’s Andrew Marr Show to defend his use on medical grounds of banned substances ahead of key races including the Tour de France in 2012, when he became the first Briton to win cycling’s biggest race.

Earlier this month, the Fancy Bears computer hacking group published copies of Therapeutic Use Exemption (TUE) certificates issued by the UCI to Wiggins that revealed, among other things, that he had received intramuscular injections of triamcinolone ahead of the Tour de France in 2011 and 2012 and the Giro d’Italia in 2013.

The certificates noted Wiggins’ “life long allergy to pollen,” resulting in symptoms including “nasal congestion/rhinorrhea, sneezing, throat irritation, wheezing leading to dyspnoea, eye watering [and] runny nose,” and also highlighted a “known allergy to grass pollen.”

Former professional cyclists David Millar and Jörg Jaksche have both admitted having used the drug during their career, with the former saying it had an effect on him beyond that of any other banned substance he ever took, and the latter saying that Wiggins’ pattern of use of it was similar to how it had been used during his period he was riding to enhance performance.

> Wiggins TUEs questioned

But in a pre-recorded interview with Marr, Wiggins drew a distinction between his use of the drug with the permission of medical professionals and the UCI, and that of riders who had used it specifically to gain an unfair advantage.

“It was prescribed for allergies and respiratory problems,” said the 36-year-old. “I’ve been a lifelong sufferer of asthma and I went to my team doctor at the time and we went in turn to a specialist to see if there’s anything else we could do to cure these problems.

“And he in turn said: ‘Yeah, there’s something you can do but you’re going to need authorisation from cycling’s governing body’.”

He said that the 2012 TUE was only secured once the opinion of a specialist in respiratory conditions had been backed up by three independent doctors.

“This was to cure a medical condition,” Wiggins insisted. “This wasn’t about trying to find a way to gain an unfair advantage, this was about putting myself back on a level playing field in order to compete at the highest level.”

Wiggins has also come under fire due to the nature of the administration of the drug, via injection, especially given comments he made about the use of needles in his 2012 autobiography My Time – a book, moreover, that made no mention of his allergies.

But Wiggins again claimed to Marr that there is a distinction between injections permitted on medical grounds under a TUE and those administered as part of a doping programme.

“It was always a loaded question with regards to doping,” he insisted. “Intravenous injections of iron, EPO etc, no-one ever asked the question: ‘Have you ever had an injection by a medical professional to treat or cure a medical condition?’

“There are two sides to that, and at that period of time it was very much with a doping emphasis in the question.”

Marr, while emphasising that there was no suggestion Wiggins had cheated, put it to him that he and Team Sky had pushed right about against the boundary between what is allowed and what isn’t.

Wiggins’ response was that Sky had always operated within the rules laid down by the UCI and the World Anti-Doping Agency (WADA).

He added that with his Tour de France victory coinciding with the United States Anti-Doping Agency’s investigation into Lance Armstrong that in October 2012 saw the American banned from cycling for life, he himself came under particular scrutiny while wearing the yellow jersey that summer.

“Cycling has been through a very turbulent period the last couple of years in the post Lance Armstrong era, and obviously I won the Tour de France right at the height of that in 2012,” he told Marr.

“It’s still an open wound in cycling and it will take many years to get over that, especially for the guys that are winning and competing at performing at the Tour De France.

“Whoever is leading in the sport at that time, and at the moment it’s Team Sky, they’re leading the way, and you know, they’re setting the standard for everybody. And they’re the best at what they do.

“Unfortunately, when you’re the best of what you do sometimes comes scrutiny, especially in a sport that has a tainted history,” he added.

The episode will be available for the next four weeks to viewers in the UK via BBC iPlayer.