The NRL has reached agreement with the Rugby League Players Association to test players for two classes of prescription drugs.
NRL chief operating officer Jim Doyle said he had advised all club chief executives in February the testing would take place and they have now reached an agreement with the Players Association to test for Benzodiazepines (which include brand names such as Valium, Serepax, Mogadon and Rohypnol) and Zolpidems (which include Stilnox, Zolsan and Stilnoct).
Urine samples provided by players during routine tests for illicit drugs would also be checked for the two classes of prescription drugs.
"During the 2014 season, we will conduct testing for data gathering purposes only,'' Doyle said. "We want to find out if we do have a problem with prescription drugs in rugby league because, at present, there is only anecdotal evidence.
"By the end of the year, we will know if prescription drugs are being abused in our game and we can take steps to remedy the problem. If there is a problem the NRL may decide to impose sanctions for the abuse of prescription drugs from 2015.''