Heparin
An anticoagulant that potentiates antithrombin to prevent clot formation.
Heparin is an anticoagulant that potentiates antithrombin to prevent new clot formation, used when a rapid effect is needed. Monitor aPTT for IV therapy and keep protamine sulfate available as the antidote; give subcutaneous doses in the abdomen without aspirating or massaging the site. Watch for heparin-induced thrombocytopenia, signaled by a falling platelet count, which requires stopping the drug immediately.