From Wikipedia
Meldonium was added to the World Anti-Doping Agency (WADA) list of banned substances effective 1 January 2016 because of evidence of its use by athletes with the intention of enhancing performance. It was on the 2015 WADA's list of drugs to be monitored. WADA classes the drug as a metabolic modulator, just as it does insulin.

What Is Meldonium, And Why Do Athletes Like Maria Sharapova Take It?



Well I wasn't suspicious of the win streak after the Klitschko fight before this, but I am now.