"For the past 10 years I have been given a medicine called mildronate by my family doctor and a few days ago after I received the letter from the ITF [International Tennis Federation] I found out it also has another name of meldonium, which I did not know."
Now, does anyone remember the big doping scandal which accused the Russian Ministry of Sports of covering up doping violations? http://bigstory.ap.org/8e4ac8f10f974df79dd490e7422f4855
It wouldn't surprise me the slightest if massive amount of Russians have been taking Meldonium just to enhance their performance for the past few years. And it also wouldn't surprise me if this was a worldwide problem to some lesser extent. Why isn't every medicine suspected of enhancing performance instantly banned?
The question about why every suspect medicine isn't instantly banned , using Meldonium as a test case , what happens when when a medicine is suspect it goes on a watch list , where it is then closely monitored by looking at the number of times it shows up in regular testing ,looking at geographical hot spots in the percentages and other pattern of use data , in Meldoniums case the evidence was enough to then move it on to the banned list.
The reason for this is you can show you did due diligence when you ban a medicine and it wasn't just a knee jerk reaction , another thing is by doing it this way you get a better picture overtime on how these grey area drugs are being organised and administered , and that helps with detection and enforcement.