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Warfarin action

Warfarin, sold under the brand name Coumadin among others, is a medication that is used as an anticoagulant (blood thinner). It is commonly used to treat blood clots such as deep vein thrombosis and pulmonary embolism, and to prevent stroke in people who have atrial fibrillation, valvular heart disease or artificial heart valves Warfarin, or brand name Coumadin, is a type of blood thinner that helps minimize or disturb the proper clotting of blood. It's a very commonly used oral medication. Let's go over this drug's. Warfarin | Mechanism of Action, Indications, Adverse Reactions, Contraindications - YouTube. DAC Pre-Roll: Navy IT 15. Watch later. Share. Copy link. Info. Shopping. Tap to unmute. If playback. Warfarin sodium has a narrow therapeutic range (index), and its action may be affected by factors such as other drugs and dietary vitamin K. Therefore, anticoagulation must be carefully monitored during Warfarin sodium therapy

Warfarin - Wikipedi

Warfarin is a synthetic anticoagulant. Warfarin inhibits the regeneration of vitamin K1 epoxideand so the synthesis of vitamin K dependent clotting factors, which include Factors II, VII, IX and X, and the anticoagulant proteins C and S Warfarin is an anticoagulant (blood thinner). Warfarin reduces the formation of blood clots. Warfarin is used to treat or prevent blood clots in veins or arteries, which can reduce the risk of stroke, heart attack, or other serious conditions. Warfarin may also be used for purposes not listed in this medication guide Warfarin (Coumadin, Jantoven) is an anticoagulant drug that inhibits the blood from clotting, thus preventing blood clots. It is prescribed for the treatment of patients with deep vein thrombosis, the reduction of pulmonary embolism, and in patients with atrial fibrillation to reduce the risk of strokes and heart attack Warfarin, an oral anticoagulant, prevents the formation of blood clots, and if a blood clot has already occurred, it prevents further clot progression

Warfarin works by inhibiting the hepatic production of vitamin K-dependent clotting factors and cofactors. To synthesize these clotting factors, vitamin K must be in its reduced form. During the synthetic process, warfarin is oxidized. An enzyme - vitamin K epoxide reductase - then reactivates that oxidized vitamin K Warfarin, like dicumarol, is a 4-hydroxycoumarin-derived anticoagulant used in the treatment of thromboembolic conditions. While it is administered as a racemic mixture of R- and S-enantiomers, the S-isomer exhibits 2-5 greater anticoagulant potency than the R-isomer Warfarin is used to treat and prevent blood clots that might result in heart attack, stroke, or death. It's also used for blood clots in atrial fibrillation, heart valve replacement, venous.. Warfarin is an oral vitamin K antagonist. Warfarin is the anticoagulant of choice for the prevention of thromboembolic events in patients with mechanical heart valves and valvular atrial fibrillation, as well as for patients with end-stage renal failure Patients with heterozygous polymorphism genotypes of VKORC1 or CYP2C9 require genotype-directed therapy with warfarin to increase efficacy and safety in anticoagulant treatment

Warfarin - Mechanism of ActionAnticoagulantCoumadin About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features © 2021 Google LL Mechanism Of Action Of Warfarin Biology Essay. Warfarin is an anticoagulant medication that is used to prevent thrombosis (clots) and embolism in many disorders. Warfarin activity has to be monitored by frequent blood testing for the International Normalized Ratio (INR). Warfarin is a synthetic derivative of coumarin, a chemical found naturally.

DVT and PE treatment Initiate warfarin on day 1 or 2 of parenteral anticoagulation therapy (eg, LMWH or unfractionated heparin) Overlap warfarin and parenteral anticoagulant for at least 5 days.. Mechanism of Action Warfarin is thought to interfere with clotting factor synthesis by inhibition of the C1 subunit of the vitamin K epoxide reductase (VKORC1) enzyme complex, thereby reducing the.. The same action of warfarin that prevents blood clotting can result in bleeding. Warfarin treatment requires careful monitoring. Certain foods, medications, diet changes and illnesses can interfere with warfarin and increase your risk of bleeding The simplest complete system accounting for the time-course of changes in the prothrombin time induced by warfarin requires the combination of 4 independent models: A pharmacokinetic model for the absorption, distribution, and elimination of warfarin. Warfarin is essentially completely absorbed, rea

Warfarin Mechanism of Action - Video & Lesson Transcript

Warfarin Mechanism of Action, Indications, Adverse

Duration of action of a single dose is 2-5 days Half life: Following a single warfarin dose, the terminal half-life is about 1 week with a mean effective half-life of 40 hr (range, 20 to 60 hr). (Prod Info COUMADIN(R) oral tablets, intravenous injection, 2010 Warfarin has a slow onset of action. In fact, warfarin's therapeutic effect is delayed for 4 to 5 days, until all existing activated factors II, VII, IX, and X are depleted from the circulation. Warfarin binds extensively and nonspecifically to plasma proteins Warfarin is administered as a racemic mixture of the R- and S-stereoisomers. S-warfarin is 3-5 times more potent than R-warfarin and metabolised predominantly by CYP2C9. Interindividual differences in pharmacokinetic parameter values and treatment outcomes with warfarin are associated with CYP2C9 polymorphisms

Warfarin - FDA prescribing information, side effects and use

PURPOSE Without supporting evidence, clinicians commonly recommend that warfarin be taken in the evening. We conducted a randomized controlled trial to evaluate the effect of administration time (morning vs evening) on the stability of warfarin's anticoagulant effect. METHODS A total of 236 primary care physicians serving 54 western Canadian communities mailed letters of invitation to all. Indications for initiating warfarin are listed in Table 2.1 In persons with nonvalvular atrial fibrillation, clinicians often base the decision to start warfarin or LMWH on clinical risk estimates. Management of Elevated INRs. Increase or decrease oral Vitamin K administration based on the clinical situation. Parenteral Vitamin K should only be used for life-threatening bleeding and is therefore not appropriate for outpatient use. Use the recommendations for the next lower INR range in the following situations Warfarin (Coumadin) NCLEX questions for nursing students! Warfarin (Coumadin) is an anticoagulant that helps prevent and treat blood clots. The nurse should be aware of how the drug works, why it is ordered, nursing implications, signs and symptoms of toxicity, and how to teach the patient how to take the medication

Warfarin's Mechanism of Action MO(A) Oooosee what we did there? Modus operandi (MO) vs mechanism of action (MOA). Pharmacy punny. Warfarin inhibits the enzyme VKORC1, aka vitamin K oxido-reductase. This enzyme is responsible for taking oxidized (aka used, electron-depleted) vitamin K and reducing it (aka adding electrons) Mechanism of Action . Warfarin is thought to interfere with clotting factor synthesis by inhibition of the C1 subunit of the vitamin K epoxide reductase (VKORC1) enzyme complex, thereby reducing the regeneration of vitamin K 1 epoxide. The degree of depression is dependent upon the dosage administered and, in part, by the patient's VKORC1.

Warfarin C19H16O4 - PubChe

  1. K 2.5 to 5 mg orally) * Reload refers to giving the patient up to twice the daily maintenance dose **see reversal guidelines regarding use of vita
  2. Warfarin may cause severe bleeding that can be life-threatening and even cause death. Tell your doctor if you have or have ever had a blood or bleeding disorder; bleeding problems, especially in your stomach or your esophagus (tube from the throat to the stomach), intestines, urinary tract or bladder, or lungs; high blood pressure; heart attack; angina (chest pain or pressure); heart disease.
  3. Warfarin. 1. Anticoagulant Treatment shlsh-220@hotmail.com. 2. Definition of Anticoagulation Therapeutic interference (blood-thinning) withthe clotting mechanism of the blood to prevent or treat thrombosis and embolism. 3. ANTICOAGULATION :are given to prevent and reat thrmbo-embolic disease but thereare many use , ANTICOAGULATION are used to.

Mechanism of Action. Warfarin's anticoagulant effects help prevent clot formation and the extension of any current clots, but it has no direct impact on clot removal or reversing ischemic tissue damage. Warfarin exhibits its anticoagulation effects via the intrinsic and extrinsic pathways in the clotting cascade Warfarin is a type of medicine known as an anticoagulant, or blood thinner. It makes your blood flow through your veins more easily. This means your blood will be less likely to make a dangerous blood clot. Warfarin is used to treat people who have had a previous blood clot, such as: a blood clot in the leg (deep vein thrombosis, or DVT Warfarin diet means finding a balance in daily eating vegetables without major fluctuations in amount. Lege artis practice is getting regularly tested on your INR, adjust the current dose of warfarin and thus simultaneously ensuring the effectiveness and safety of treatment, without having to reduce the intake of vegetables.. Mechanism of action. Warfarin is a synthetic anti-coagulant of the coumarin series and acts by inhibiting the synthesis of vitamin K dependent clotting factors, which include Factors II, VII, IX and X, and the anticoagulant proteins C and S. Half-lives of these clotting factors are as follows: Factor II-60 hours, VII-4-6 hours, IX-24 hours, and. The first drug, Warfarin, is an anticoagulant. It is a Vitamin K inhibitor which means that it blocks the activation of Vitamin K, decreasing the production of Vitamin K clotting factors, which are factors VII, IX, X and prothrombin (PME). Warfarin has a few side effects to keep in considerations, such as hemorrhage

Dosages :Adjust dosage according to the one-stage PT to achieve and maintain 1.5-2.5 times the control value or prothrombin activity 20%-30% of normal; PT ratio of 1.3-1.5 or INR of 2-3. IV use is reserved for situations in which oral warfarin is not feasible. Dosages are the same for oral and IV forms Warfarin inhibits the vitamin K-dependent synthesis of clotting factors II,VII, IX and X in the liver. The antithrombotic effect, and mechanism of haemorrhage, relates to low levels of these coagulation factors and a reduction in their activity in thrombus formation. The effect of warfarin is influenced by many factors Vitamin K is essential for good health, but when taking warfarin, you need to be aware of the vitamin K content of various foods and limit those that contain high amounts. A 1-cup serving of prunes , or dried plums, is the highest source of Vitamin K among fruits with a total of 103.5 micrograms, or 129 percent of the recommended daily value large amounts of vitamin K may antagonize effects of warfarin. assess for signs of bleeding. therapeutic levels: PT 1.3-1.5, INR 2.5-3.5. instruct patient to report any signs of bleeding. patient should not drink alcohol. bleeding times need to be monitored frequently. vitamin K is antidote Warfarin sodium is a narrow therapeutic range (index), and its action may be affected by factors such as other drugs and dietary vitamin K. Therefore, anticoagulation must be carefully monitored during warfarin sodium therapy. Determine the INR daily after the administration of the initial dose until INR results stabilize in the therapeutic range

Warfarin Uses, Dosage, Side Effects - Drugs

Warning in Coumadin Package Insert: Exercise caution when botanical (herbal) products are taken concomitantly with COUMADIN. Few adequate, well-controlled studies evaluating the potential for metabolic and/or pharmacologic interactions between botanicals and COUMADIN exist. Due to a lack of. Accidental warfarin ingestion is also reported by Rook : a 6-year-old boy was noted to lose over 50 % of his hair during a 6-month period when he was often observed to play with soil on a farm which used warfarin as rat poison. Rook also describes a more typical case of a 43-year-old man who complained of severe alopecia 3 months after his. Warfarin is a medication used in the prophylaxis and treatment of venous thrombosis and thromboembolic events. It is in the anticoagulant class of drugs. This activity reviews the indications, action, and contraindications for warfarin as a valuable agent in the prophylaxis and treatment of myocardial infarction, deep vein thrombosis, pulmonary.

warfarin (Coumadin, Jantoven) Side Effects, Dosage & Use

BIOLOGY. Mechanism of action — Warfarin and related vitamin K antagonists (VKAs) block the function of the vitamin K epoxide reductase complex in the liver, leading to depletion of the reduced form of vitamin K that serves as a cofactor for gamma carboxylation of vitamin K-dependent coagulation factors [ 1 ]. The epoxide reductase is needed. heparin and warfarin with respect to mechanism of action, administration, time to onset of activity, method of monitoring, antidotes and use during pregnancy. 5. Understand why particular disease states and co-administration of other drugs can alter the efficacy and side effects of warfarin. Be able to describe specifi However, its onset of action is delayed for 2-3 days after therapy commences and therefore, in clinical settings where urgent anticoagulation is required, heparin is used to provide this rapid onset. Mechanism of Action. Warfarin produces its anticoagulant effect by inhibiting the hepatic production of clotting factors 2, 7, 9, and 10 Warfarin. 15 January, 2004. VOL: 101, ISSUE: 38, PAGE NO: 35. GENERIC AND PROPRIETARY NAMES. - Warfarin. - Marevan. ACTION. - Prevents the production of clotting factors by inhibiting the action of vitamin K. This means fibrin cannot be converted into fibrinogen and blood clots are therefore less likely to form Heparin vs. Warfarin Nursing NCLEX Review. This NCLEX review will discuss Heparin vs. Warfarin (Coumadin). As a nursing student, you must be familiar with the differences and similarities between these two anticoagulants. This review will highlight how the medications work, nursing considerations, antidotes, and patient education

Indeed, Bactrim is the Sabretooth to warfarin's Wolverine. You will probably reduce the warfarin dose by about 50% for patients starting Bactrim. In higher risk, more sensitive patients, you may even hold a dose of warfarin and then reduce it. Amiodarone. Let's just make a nice and tidy list to cover amiodarone Find information on Warfarin (Coumadin, Jantoven) in Davis's Drug Guide including dosage, side effects, interactions, nursing implications, mechanism of action, half life, administration, and more. Davis Drug Guide PDF In this case, S-warfarin is found to be 5 times more potent as an anticoagulant than R-warfarin. Preparation of enantiomerically pure warfarin can be made by the classical resolution of the racemate using quinidine/quinine salts 4 or chromatographic separation. However, these methods are limited to small scale preparations

  1. PTT. , unchanged thrombin time (not routinely monitored) The most important side effect of all oral. anticoagulants. is a dose-dependent increase in bleeding risk. DRAW: Dabigatran, Rivaroxaban, Apixaban, and Warfarin are the most important oral. anticoagulants. . RivaroXaban, apiXaban, and edoXaban are factor Xa inhibitors
  2. Other drugs which inhibit haemostasis, clotting or platelet action. Low-dose aspirin with warfarin may have a role in some patients but the risk of gastrointestinal bleeding is increased. Warfarin may initially be given with a heparin in the initial treatment of thrombosis, until the INR is in the correct range
  3. imum effective and
  4. K antagonist. That means it works to stop your liver from processing vita
  5. Warfarin is prescribed for both adults and children. Who should not take warfarin? Not everyone can take warfarin. It is not suitable for: People with any clinically significant active bleeding
  6. Warfarin is a blood-thinning medication that helps treat and prevent blood clots. There is no specific warfarin diet. However, certain foods and beverages can make warfarin less effective in preventing blood clots. It's important to pay attention to what you eat while taking warfarin
  7. Warfarin is a racemic (equal) mixture of two enantiomers, S-warfarin and R-warfarin. While both enantiomers are pharmacologically active, S-warfarin provides the majority of the clinical effect and toxicity of warfarin, as it is five times more potent than R-warfarin. Both S-warfarin and R-warfarin are metabolized by cytochrome P450 (CYP.

Crossref. Scopus (114) Google Scholar. evaluated the ability of 2.5 mg of oral vitamin K 1 to reverse an excessive warfarin effect in 81 patients with an INR of 5.0 to greater than 10.0. Ninety percent of the patients achieved an INR of less than 5.0 and only 17% developed an INR of less than 2.0 Warfarin is commonly used in general practice to treat and prevent thrombosis in a range of clinical settings. It acts by antagonising the action of vitamin K resulting in production of defective clotting proteins. It is cleared via the cytochrome P450 enzymes in the liver and is subject to interactions with a large number of drugs Sites of action of warfarin Reproduced with permission from Elsevier Ltd from Uchiyama S, Ibayashi S, Matsumoto M, et al. J Stroke Cerebrovasc Dis 2012;21:165-73 Figure 2 Anticoagulants: Alcohol interacts with warfarin, and the consequences of this interaction can lead to significant patient harm. Depending on the frequency of alcohol consumption, alcohol can lead to an increase or decrease in the anticoagulant effect of warfarin. When alcohol is chronically consumed by patients, there is increased metabolism of. Mechanism of action. Warfarin inhibits the synthesis of biologically-active forms of the vitamin K-dependent clotting factors II, VII, IX and X, as well as the regulatory factors protein C, protein S, and protein Z.Other proteins not involved in blood clotting, such as osteocalcin, or matrix Gla protein, may also be affected.. The precursors of these factors require carboxylation of their.

Warfarin is a type of medicine known as an anticoagulant, or blood thinner. It makes your blood flow through your veins more easily. This means your blood will be less likely to make a dangerous blood clot. Warfarin is used to treat people who have had a previous blood clot, such as: a blood clot in the leg (deep vein thrombosis, or DVT Drug Interactions. Complex interaction that takes place over 6-8 weeks. Ultimately expect 25-50% warfarin dose reduction. Check INR q1-2 weeks and make serial adjustments per INR. More significant if course >14 days. Not always clinically significant if pt not systemically ill. Varies from year to year, but may cause transient rise in INR Warfarin patient education booklet (e.g. medication manufacturing company, private pathology or other) Guidelines for warfarin management in the community - 2 - 1. Guideline 1.1 General information Warfarin inhibits the synthesis of vitamin K-dependent clotting factors (II, VII, IX, X) and the antithrombotic factors, protein C and protein S.. There is an 8-12 hour delay in the action of warfarin due to the time it takes for degradation of clotting factors within the circulation. Warfarin is a racemic compound that undergoes hepatic metabolism by multiple P-450 isozymes. S-warfarin is the most potent enantiomer,. Pharmacokinetics. peak plasma drug concentration in < 1 hr BUT. delayed hypothrombic effect (1-3 days); t½ 35 hr, biological t½ 6-6O hrs. narrow therapeutic index. WARFARIN is a racemic mixture of R- and S-forms - S is the active enantiomer. S is metabolized primarily by CYP2C9

Research now under way may one day allow clinicians to customize warfarin doses based on each patient's genetic profile (N Engl J Med. 2009;360:753-764).In the meantime, a secondary analysis. Although regular testing of INR levels is essential for all people taking warfarin to maintain control of the INR, in practice, INR levels show considerable intra-patient variability. A study has demonstrated that a group of stable patients, on long-term warfarin treatment achieved the therapeutic range for INR approximately 55% of the time. 2

การค้นพบยาวอร์ฟาริน(Warfarin) เริ่มต้นเมื่อ90 ปีที่แล้วที่อเมริกาเหนือ และแคนาดา พบว่าวัวที่สุขภาพแข็งแรงล้มตายจากเลือดออก. Warfarin (Coumadin ) is a blood thinner that helps prevent clots from forming in the blood vessels and the heart. Foods high in vitamin K can affect the way Coumadin works in your body. The more vitamin K rich foods you eat, the lower the levels of Coumadin in you Warfarin interferes with the action of vitamin K and therefore prolongs the time it takes to form a clot. This is the intended effect of this therapy. Increasing vitamin K intake while you are on warfarin will work against the action of this medication

Stereospecific Metabolism of R- and S-Warfarin by Human

Warfarin Pharmacology Anticoagulant Medicines Made Simple

Warfarin can cause very serious (possibly fatal) bleeding. This is more likely to occur when you first start taking this medication or if you take too much warfarin.. To decrease your risk for. Warfarin (Coumadin, Jantoven) is an oral anticoagulant most commonly used for the prevention and treatment of thromboembolic events (blood clots) in patients with atrial fibrillation, prosthetic heart valves, venous thrombosis and/or pulmonary embolism.1 As a complication of their diagnosis, some patients taking warfarin will also develop supraventricular or ventricular arrhythmias which may. Warfarin blocks the action of vitamin K, causing an inhibition of blood clotting factors and the pro-bone-building hormone osteocalcin. Warfarin is a teratogen which can cross from the mother to the developing fetus

Warfarin - an overview ScienceDirect Topic

In a study of 11 patients on stable warfarin, INR increased after 4 days of taking APAP 4 g/day increasing the risk of bleeding (7). A 72-year-old man was on acenocoumarol, chronically self-medicating with APAP 1 to 2 g/day for low back pain. His INR was stable at 2.5, but when APAP was stopped his INR dropped to 1.62 Warfarin is known to cause birth defects and should not be used during pregnancy. Any woman currently taking warfarin who plans to get pregnant must contact her prescribing doctor to discuss transition to an appropriate heparin formulation. As with all blood thinners, it is a good idea to avoid taking medications, such aspirin and other NSAIDs.

Warfarin: Side Effects, Dosage, Uses, and Mor

Warfarin (Coumadin; Jantoven) is an oral anticoagulant most commonly used for the prevention and treatment of thromboembolic events (blood clots) in patients with atrial fibrillation, prosthetic heart valves, venous thrombosis and/or pulmonary embolism.1 Metronidazole (Flagyl) is an oral antibiotic most commonly used to treat a number of gastrointestinal and genitourinary infections.2- First, warfarin acts by inhibiting the action of vitamin K, which is required to carboxylate and thereby activate four clotting factors (II, VII, IX, and X). This inhibition translates to prolongation of blood clotting times, measured using the prothrombin time or the international normalized ratio (INR). Because warfarin inhibits the action of. Due to its mechanism of action the anticoagulant effect of warfarin is delayed until the previously synthesised normal factors are metabolised. On administration, therefore, one can expect the.

Warfarin Prescribing Summary Geeky Medic

  1. K 1 is appropriate; 10 mg orally is a reasonable daily dose. Since the pharmacologic effects of warfarin wear off within days, otherwise healthy patients with acute warfarin ingestions do not need supplemental vita
  2. Warfarin is a commonly used medication for the prevention and treatment of venous thromboembolism. It can be challenging for both the patient and the prescriber to manage at times. Objective To describe the mechanism of action of warfarin, and to discuss the indications for warfarinisation, the risks associated with warfarin use, and some of.
  3. K epoxide reductase (VKORC1) enzyme complex, thereby reducing the regeneration of vita
  4. Warfarin is an essential drug for the prevention of thrombosis after valvular surgery, which has a narrow therapeutic range. Although there are general dosing guidelines, the dosing of warfarin is complicated by relatively high incidences of drug-drug interactions and inter-patient variability [1,2,3].Controlling the dosage of warfarin in patients admitted to the intensive care unit (ICU.
  5. Warfarin sodium is an anticoagulant medication. Anti means against and coagulant means causing blood clotting. Warfarin controls the way that blood clots (thickens into a lump) inside your blood vessels. The brand names of warfarin are Coumadin® and Jantoven®. Cleveland Clinic is a non-profit academic medical center
Coumarins

The Impact of Gene Polymorphisms on Anticoagulation

  1. K and vita
  2. uregent warfarin reversal with fast and sustained action rapid INR reduction to less than 1.3 at .5 hours after end of infusion warfarin drug interactions aspirin rivaroxaban dabigatran levothyroxine fluoxetin
  3. Furthermore, warfarin requires time for initiation of its action And hence should be given while the patient is still in the hospital And is under heparinization. Cite 1 Recommendatio
  4. or drug interactions. warfarin oral brand names and other generic formulations include: Athrombin-K Oral, Coufarin Oral, Coumadin Oral, Jantoven Oral, Panwarfin Oral, Sofarin Oral. All generic drug interactions for warfarin oral (lists will include brand and generic names)
  5. offset of action than warfarin, we can short-en the time the patient is unprotected against thromboembolism in the periopera-tive period. Formerly, virtually all patients requiring bridging were hospitalized to receive unfractionated heparin intravenous-ly; now, many give themselves subcutaneous doses of low-molecular-weight heparin at home.
Warfarin - FDA prescribing information, side effects and uses

Evidence that warfarin anticoagulant action involves two distinct reductase activities. J Biol Chem. 1982; 257: 11210-11212. Medline Google Scholar; 3 Choonara IA, Malia RG, Haynes BP, et al. The relationship between inhibition of vitamin K1 2,3-epoxide reductase and reduction of clotting factor activity with warfarin. Br J Clin Pharmacol Therapeutic Action Warfarin, an oral agent in this class, reduces Vitamin K-dependent clotting factors. As a result, clotting process is prolonged. Two new oral agents, dabigatran and rivaroxaban, directly inhibits thrombin (last step in clotting process) and factor Xa, respectively Warfarin carries a risk of brain hemorrhage, which is uncommon but fatal. Although significant bleeding events occur less frequently when taking Xarelto than with warfarin, they could happen. Luckily the serum half-life of rivaroxaban is comparatively brief — five to nine hours — so its effect will vanish within about 24 hours Coumadin (warfarin) is a blood anticoagulant that inhibits the function of Vitamin K dependent coagulation used to inhibit the coagulation of blood to reduce or prevent the chance of developing heart attacks (myocardial infarctions), strokes, and venous and other blood clots (deep venous thromboses, pulmonary emboli and thrombi produced with atrial fibrillation) Warfarin is commonly called a blood thinner, but the more correct term for it is an anticoagulant. The blood needs vitamin K to be able to clot. Warfarin slows the production of vitamin K in the body, which increases the time it takes for the blood to clot. It helps the blood to flow freely around the body and prevents any clots.

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