Russian Curler Alexander Krushelnitsky Allegedly Failed Drug Test According to CBS News, Krushelnitsky’s coach dismissed claims that the athlete used Meldonium, which increases stamina and has been banned since 2016. Reports say a lab in Seoul will double-check the test for confirmation. Other Olympic athletes participating in this year’s Winter Games have shared their concerns. Mark Kennedy, a Canadian curler (CBS News) Russia has been the center of droping controversy before for allegedly having a state-sponsored doping program.