Players who mix sleeping pills and energy drinks in future will not play for the Kiwis as the NZRL look to take a tough stance on the use of prescription pills in rugby league.
The NZRL reviewed last year's World Cup campaign and concluded the misuse of prescription drugs and energy drinks, while not the principal reason for their heavy 34-2 defeat to Australia in the final, was a factor in their poor performance.
It's a problem that's widespread in rugby league and the NRL last week announced plans to test players for prescriptive drugs. Some clubs, including the Warriors, have also implemented strict controls.
Mixing sleeping pills and energy drinks is supposed to give a high similar to recreational drugs but is not illegal or banned by drug-testing agencies. The New Zealand players imposed an alcohol ban during the World Cup but a "small percentage'' used pills and energy drinks as an escape after games.
Stephen Kearney, who was today confirmed as Kiwis coach for another two years, was first aware it might be a problem on the bus trip from Leeds to London two days after their quarter-final defeat of Scotland.