Ergoloid Mesylates API Powder USP For Custom Compounding (Rx)Ergoloid Mesylates API Powder Ergoloid mesylates (also known as dihydroergotoxine mesilate) is a mixture of hydrogenated ergot alkaloids. Specifically, it contains salts of dihydroergocornine, dihydroergocristine, and the and isomers of dihydro ergocryptine. These are derived from the ergot fungus, but unlike older ergot drugs, the dihydro formulation has no significant vasoconstrictor activity. The API powder (USP grade) is used to produce oral