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Low-molecular-weight heparin (LMWH) is a class of anticoagulant medications. [1] They are used in the prevention of blood clots and, in the treatment of venous thromboembolism (deep vein thrombosis and pulmonary embolism), and the treatment of myocardial infarction.
Antistasin, the first discovered naturally occurring direct Xa inhibitor Rivaroxaban, the first synthetic direct Xa inhibitor marketed as a drug 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 ...
Rivaroxaban. During the SAR development of rivaroxaban, researchers realized that adding a 5-chlorothiophene-2-carboxamide group to the oxazolidonine core could increase the potency by 200 fold, which had previously been too weak for medical use. In addition to this discovery, a clear preference for the (S)-configuration was confirmed.
Rivaroxaban inhibits both free and bound Factor Xa in the prothrombinase complex. [33] It is a selective direct factor Xa inhibitor with an onset of action of 2.5 to 4 hours. [34] Inhibition of Factor Xa interrupts the intrinsic and extrinsic pathway of the blood coagulation cascade, inhibiting both thrombin formation and development of thrombi.
Andexanet alfa, sold under the brand name Andexxa among others, is an antidote for the medications rivaroxaban and apixaban, when reversal of anticoagulation is needed due to uncontrolled bleeding. [8] It has not been found to be useful for other factor Xa inhibitors. [9] It is given by injection into a vein. [9]
When switching antidepressants, your healthcare provider may recommend switching directly, cross-tapering or tapering down your dosage before you start using your new medication.
An anticoagulant, commonly known as a blood thinner, is a chemical substance that prevents or reduces the coagulation of blood, prolonging the clotting time. [1] Some occur naturally in blood-eating animals, such as leeches and mosquitoes, which help keep the bite area unclotted long enough for the animal to obtain blood.
Mechanism of class-switch recombination that allows isotype switching in activated B cells. Immunoglobulin class switching, also known as isotype switching, isotypic commutation or class-switch recombination (CSR), is a biological mechanism that changes a B cell's production of immunoglobulin from one type to another, such as from the isotype IgM to the isotype IgG. [1]