“Thionamides resemble the methyltetrazole-thiol leaving … of certain cephalosporin antibiotics, and both thionamides and cephalosporins have been found to inhibit the vitamin-K-dependent gamma-carboxylation of glutamic acid in vitro [8]: actually, PTU has been associated with hypoprothrombinemia [9], disseminated intravascular coagulation [10], and acute thrombocytopenic purpura [11].”