As the World Anti-Doping Agency warns that more than 10% of elite athletes could be using performance-enhancing drugs (PEDs), the gaming industry is addressing its own problems.

The largest eSports events company, the Electronic Sports League (ESL), is to begin random drug testing at competitive tournaments.

It follows warnings from industry experts and insiders about drug use.

The "catalyst" was an interview in which a player admitted using drugs.

ESL's Vice President of Progamming James Lampkin told Newsbeat he has "known for some time" that they would "eventually have to be directly tackling performance enhancing drugs in e-sports".

Then, a few weeks ago, competitive player Kory Friesen admitted he had used the drug Adderall during a major competition in March which carried a $250,000 prize.

It's a Class B drug in the UK and a prescription medication in the US, used to treat narcolepsy and attention deficit hyperactivity disorder (ADHD).

Kory claimed its use was extremely common amongst players who want to stay alert.

"With this claim that he made we knew we had to immediately move into action," James told us.

Once it came to light that some players were using it... we suspected that other players would begin to use drugs James Lampkin Electronic Sports League

"We don't think the problem [of doping] is widespread but we suspect that once it came to light that some players were using it, and because there were no really strong enforcement mechanisms, that other players would begin to use drugs - so that's why we've began to move so quickly against the problem".

He also says he thinks drug use is a recent problem: "As the industry has seen this massive growth over the past few years the stakes have increased quite substantially.

"The stakes are getting so high some players are looking for ways to get over the stress and look for ways of getting the edge in competitions".

"Five or six years ago some of these players might have only been playing for a few thousand dollars and getting PEDs may not have made sense.

"But in the last year or so because the prize pools have increased so dramatically into hundreds of thousands of dollars per event, with huge salaries coming on board, now we're looking at players really starting to look for that specific edge that could mean the difference in half a second of reaction time that could win them an event."

Over the past 10 years the industry has grown rapidly and the ESL alone has more than five million registered players.

ESL and other eSports organisations already ban the use of drugs, alcohol and other performance enhancers, but this is the first time they will carry out actual testing.

The first PED skin tests will be done at the ESL One Cologne tournament this August and the organisation plans to carrying them out at other events too.

It is establishing an official policy and updating its tournament rules.

The ESL also plans to work with the World Anti Doping Agency in Canada, to get their help making and enforcing its policy in the US, Asia and Australia.

James says the ESL isn't sure what the tests will reveal.

"It's very hard to tell right now what the doping rates will be once we implement the programme at our next event in Cologne, Germany."

"The most important part for us here is to level the playing field," he adds.

"Our goal is to set the standard for the entire industry and we think once we've done that the other leagues will begin to follow."

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