"Isometheptene (usually as isometheptene mucate) is a sympathomimetic amine sometimes used in the treatment of migraines due to its vasoconstricting properties, that is, it causes constriction (narrowing) of blood vessels (arteries and veins). Along with paracetamol and dichloralphenazone, it is one of the constituents of Amidrine."Maybe not "performance enhancing" but banned nonetheless. I wonder if he took it himself or if the ATP trainer gave it to him...