**Ethamsylate:** is a derivative of benzene methane isothiacyanate. In chemical structure, it differs from dicynone in the absence of a second aromatic ring and a simpler fragment of the side chain (instead of the biphenyl ring of the thiazole series, there is a pyrrolone ring containing one substituent). In addition, these two drugs differ significantly in their mechanism of action, exhibiting a different range of hemostatic and antifibrinolytic properties.
**Mechanism of antithrombotic action** The direct effect of ethamsylate on platelets determines the rapidity of the antiplatelet effect and the special pharmacokinetics of this group of anticoagulants