Photo: © 2010 AP via AAP/Anja Niedringhaus
The commando has been airlifted to a US military hospital in Germany after he was found unconscious in his room – along with pills and white powder - on Friday.
Afghanistan is considered the heroin capital of the world, but the Defence Force chief Air Chief Marshal Angus Houston has denied there is a drug culture in the barracks.
"We haven't had a single incident over the whole time we have been in Afghanistan," he says.
Despite that, all 350 members of the elite special forces unit will be tested for drugs and an inquiry has been launched.
