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Average molecular weight: heparin is about 15 kDa, and LMWH is about 4.5 kDa. [25] Less frequent subcutaneous dosing than for heparin for postoperative prophylaxis of venous thromboembolism. Once or twice daily subcutaneous injection for treatment of venous thromboembolism and in unstable angina instead of intravenous infusion of high-dose heparin.
Prior to the introduction of direct factor Xa inhibitors, vitamin K antagonists such as warfarin were the only oral anticoagulants for over 60 years, and together with heparin have been the main blood thinners in use. People admitted to hospital requiring blood thinning were started on an infusion of heparin infusion, which thinned blood ...
Heparin, also known as unfractionated heparin (UFH), is a medication and naturally occurring glycosaminoglycan. [3] [4] Heparin is a blood anticoagulant that increases the activity of antithrombin. [5] It is used in the treatment of heart attacks and unstable angina. [3] It can be given intravenously or by injection under the skin. [3]
Enoxaparin sodium, sold under the brand name Lovenox among others, is an anticoagulant medication (blood thinner). [11] It is used to treat and prevent deep vein thrombosis (DVT) and pulmonary embolism (PE) including during pregnancy and following certain types of surgery. [ 11 ]
Heparin may be used for both prevention and the treatment of thrombosis. It exists in two main forms: an "unfractionated" form that can be injected under the skin (subcutaneously) or through an intravenous infusion , and a "low molecular weight" form that is generally given subcutaneously.
Fondaparinux is a synthetic pentasaccharide factor Xa inhibitor. Fondaparinux binds antithrombin and accelerates its inhibition of factor Xa.. Apart from the O-methyl group at the reducing end of the molecule, the identity and sequence of the five monomeric sugar units contained in fondaparinux is identical to a sequence of five monomeric sugar units that can be isolated after either chemical ...
Low molecular weight heparin (LMWH, such as enoxaparin) is generally used as an alternative. [44] Warfarin and LMWH may safely be used in breastfeeding. [44] When women experience recurrent pregnancy loss secondary to thrombophilia, some studies have suggested that low molecular weight heparin reduces the risk of miscarriage.
There is no industrial process for the complete synthesis of heparin; heparin is isolated from animal tissue - generally bovine lung, porcine, and intestinal mucosa. [6] Heparinoids generally are also naturally-occurring polysaccharides, and similarly need to be purified from the plant or animal tissue that produces them.