BRISBANE Lions coach Michael Voss has strongly defended his players and sports science staff, and is confident they have nothing to be worried about with the drugs in sport investigation.

Voss, who played at the Lions for 15 seasons and is about to enter his fifth as senior coach, said he welcomed the review and had total faith in his club.

Voss said he spoke to the players on Thursday afternoon following the federal government's announcement of an ongoing investigation into drugs in sport, but only to reiterate what "they've been told 100 times before".

"I trust the people we've got in place and I trust our program," Voss said.

"I think they do an exceptional job. I think our players are well and truly communicated with, as well as our staff, (so) no, I don't have that concern."

Voss admitted the issue was always on his radar, and said he went to great lengths to ensure all players knew that any supplement or substance used must first be ticked off by the club doctors.

"It's paramount, it must happen. If you put anything in your mouth, you're responsible for it.

"Every single year, and it feels like every second month, we're referring to it. I remain very confident for us, we're very good."

Voss said he was also not concerned by a brief involvement at the club in 2009 by sports scientist Stephen Dank, the man at the centre of the Essendon drugs scandal.

He also described assistant coach Shane Woewodin's involvement in 2000 with subsequently convicted drug trafficker Shane Charter as a "separate question".

But on the question of cleaning up the game, the 1996 Brownlow medallist was clear.

Voss encouraged any extra testing that may be required and was all-for the AFL's proposed whistleblower system.

"As a sport we clearly don't accept it and we look forward to what the findings show and then we get the chance to eradicate it from the sport," he said.

"It's a good little wake-up call for everyone to review how you go about things and the way you do things, but also a chance that if there is any suspicion to be able to eradicate it and then we can move on.

"It's a watershed moment, that's for sure. It's a very serious instance but it's also chance to be able to make sure the integrity of the game can be the hallmark and be always guarded.

"We've seen the findings, we've heard the findings, we want to find out who it is so we can move on.

"I think everyone is looking forward to that moment. Until that happens, I guess everyone is implicated until otherwise shown. When that moment comes, the fans will be looking forward to it, I know we are."

Michael Whiting covers Brisbane Lions news for AFL.com.au. Follow him on Twitter: @AFL_mikewhiting