Mylabris is the dried body of the Chinese blister beetle ( Mylabris phalerata Pallas). The use of Mylabris can be traced back to more than 2 000 years ago in the traditional Chinese medicine. Cantharidin (hexahydro\|3aα, 7aα\|dimethyl\|4β, 7β\|epoxyisobenzofuran\|1, 3\|dione) is the active ingredient of Mylabris. Mylabris is a potent vesicant and purported aphrodisiac used on human beings as well. If it is ingested, it will produce the congestion of the urethral mucosa, which may result in priapism in me...