Watson told On The Couch last month he thinks he was administered the drug, which is on the World Anti-Doping Agency's banned list, during the 2012 season.
Last year's Brownlow medallist said he could not bother himself with retracting his comments, but could not say why he chose the public forum.
"I suppose with the interview it's a very sensitive subject at the moment and what's happened has happened and I can't control that anymore," Watson told radio station Fox FM on Friday morning.
"I've said what I've said and I've done what I've done and I'm not going to live retrospectively.
"But like everyone I'm waiting for the investigation to be complete."
Watson said the whole process was unprecedented.
"It was a new frontier for us. The experience of having that many injections was something I had not experienced in AFL football before," he said.
The week after his startling revelation, Watson led his side to a stirring seven-point victory over West Coast in Perth.
The Bombers skipper was forced to overcome the Eagles crowd jeering him after the admission. He was noticeably emotional after the game.
"I think I was just exhausted. It's something I've never experienced before, in terms of the build up to it," Watson said.
"The booing doesn't bother me at all."
Watson will likely miss between four to six weeks with a broken collarbone after a heavy clash with Port Adelaide's Justin Westhoff.
Watson does not need the aid of a sling to hold his repaired shoulder in place, but the doctors have advised him not to sweat excessively to ensure the stitches remain intact.
Ben Guthrie is a reporter for AFL.com.au. Follow him on Twitter: @AFL_BenGuthrie