Meldonium-d3 is the deuterated form of Meldonium. Meldonium is a cardiovascular protective agent that competitively inhibits BBOX1 and OCTN2. The IC50 value of Mildronate against human recombinant BBOX is 34-62 µM, and the EC50 value against human OCTN2 is 21 µM. Meldonium is a fatty acid oxidation inhibitor[1][2][3].