In vitro se fondaparinuks v veliki meri in specifično veže na antitrombinski protein z deležem vezave, ki je v smislu odvisnosti od odmerka odvisna od koncentracije v plazmi (98, 6 % do 97, 0 % v razponu koncentracije od 0, 5 do 2 mg/ l). lje Fondaparinuks se ne veže pomembno na druge proteine plazme, vključno s faktorjem 4 (PF4). vo Fondaparinuks se ne veže pomembno na proteine plazme, razen na ATIII, zato ni pričakovati medsebojnega delovanja z drugimi zdravili zaradi izpodrivanja z vezavnih mest na proteinih. do
In vitro, fondaparinux is highly and specifically bound to antithrombin protein with a dose-dependant plasma concentration binding d (98.6 % to 97.0 % in the concentration range from 0.5 to 2 mg/ l). Fondaparinux does not bind e significantly to other plasma proteins, including platelet factor 4 (PF4). ris Since fondaparinux does not bind significantly to plasma proteins other than ATIII, no interaction with other medicinal products by protein binding displacement are expected.