LEAD:
Russia's state medical agency says it has developed a 'more effective' replacement for the controversial drug meldonium. The drug was banned the World anti-doping agency in 2016. More than 100 Russian athletes tested positive for it after the ban, including tennis star Maria Sharapova. Julia Lyubova reports from Moscow.
IN: The head of Russia's Federal..
OUT: SOC
DUR: 44'