The substance Meldonium is listed under Class S4.4.3 (Metabolic Modulators) under the World Anti-Doping Code – International Standard – Prohibited List – 2023. Meldonium is classified as a Non-Specified Substance and is prohibited at all times. Meldonium, also known as Mildronate, Quatrine, MET-88 and trimethylhydrazinium propionate (THP), is intended for the treatment of cardiovascular issues. Meldonium is not approved for use in Australia. 

Meldonium increases the capacity for oxygen delivery to tissue during exercise and can therefore enhance an athlete’s performance. As such, Meldonium was banned by the World Anti-Doping Agency in 2016.