Синкумар

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Синкумар

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Method of action: Antithrombotic

Treatment option:

Medically reviewed

Laura Arias

Last updated on 22/12/2025

This page provides general, reference-level information compiled from official medical sources. It is not a substitute for professional medical advice, diagnosis, or treatment. For decisions about your health, please consult a qualified healthcare professional.

Overview of Синкумар

Quick Facts

Property Description
Active ingredient Acenocoumarol (Аценокумарол)
Form Oral Tablet
Pharmacological class Anticoagulant, Vitamin K Antagonist (VKA)
General Purpose Prevention of unwanted blood clots
Origin Synthetic, Coumarin derivative

What is Синкумар (Acenocoumarol)?

Синкумар (Syncumar) is a powerful, prescription-only medication whose active ingredient is Acenocoumarol. It is classified as an Anticoagulant (a blood thinner) and is used to reduce the blood's capacity to clot. This drug belongs to the specific pharmacological subgroup known as Vitamin K Antagonists (VKAs). It is utilized as a key agent in managing antithrombotic risk.

What Type of Medicine is Acenocoumarol?

Acenocoumarol is a synthetic organic compound derived from coumarin. This origin indicates its chemical structure, which is clinically recognized for its relatively rapid onset of action compared to some other VKAs. Синкумар is manufactured as a single-ingredient product, containing only Acenocoumarol as the active substance, and is typically supplied in the form of an oral tablet.

How Does Синкумар Work at a High Level?

The core function of Синкумар is related to its role as a Vitamin K Antagonist. It does not physically thin the blood, but rather works by interfering with how the liver uses Vitamin K to produce active clotting factors. This mechanism is intended to achieve a sustained reduction in the blood’s capacity to form clots.

The overall therapeutic purpose of this medication is to provide a protective effect against the development of unwanted blood clots. For instance, it is typically used to ensure proper blood flow in patients who have certain heart conditions or those who have previously experienced vascular issues.

What side effects are possible with Синкумар?

The official safety profile for Синкумар (Acenocoumarol) is defined by mandatory regulatory classifications detailing the officially documented adverse reactions and specific safety constraints.

Primary Safety Risk and Classifications

As an anticoagulant, the most frequent and dose-dependent adverse reaction documented is Hemorrhage or bleeding events. This encompasses a range of manifestations, from minor cutaneous bleeding to serious, potentially fatal internal hemorrhage, and is recognized as the core safety risk of the medication. The risk of adverse events is explicitly noted in regulatory documents as being highest during the initial weeks of treatment.

Adverse reactions are classified by frequency and associated System-Organ-Classes (SOC).

Classification Examples of Reactions (Regulatory Terminology)
Common Nausea, vomiting, diarrhoea, abdominal pains, benign polyps in the stomach.
Uncommon/Rare Liver abnormalities (Hepatobiliary disorders), alopecia, hypersensitivity reactions.
Frequency Not Known Calciphylaxis, Priapism.

Serious Adverse Reactions and Constraints

Serious adverse reactions explicitly documented in official labeling include fatal and nonfatal hemorrhage, Skin Necrosis/Gangrene (often with onset in the first few days), and Calciphylaxis (a rare, painful, and potentially fatal skin condition associated more frequently with chronic kidney disease).

Official safety statements note that the drug is not recommended in severe hepatic impairment or severe renal impairment. Furthermore, the safety profile dictates caution in the elderly, who may exhibit increased sensitivity, and notes the potential for fetal harm when used during pregnancy, including risks of anomalies and neonatal hemorrhages.

Overdose and Emergency Response

Overdose and When to Seek Help

The official regulatory profile for Acenocoumarol (Синкумар) overdose focuses entirely on the effects of excessive anticoagulation. The primary clinical sign of toxicity is bleeding, which can manifest in various ways as documented by regulatory authorities.

Domain Official Regulatory Statement
Documented Overdose Presentations Bleeding is the major sign of toxicity, including haematuria, gastrointestinal bleeding, epistaxis, gingival bleeding, and extensive cutaneous bruising
Critical Laboratory Marker The finding of an elevated International Normalized Ratio (INR) confirms excessive anticoagulation beyond the therapeutic range.
Severe Outcomes The risk includes major or fatal bleeding and signs of significant blood loss, such as hypotension and cardiovascular collapse
Mandated Emergency Action The drug must be discontinued immediately at the first appearance of gross bleeding; call a poison control center or seek medical care right away

Official Management and Monitoring

Any suspected overdose or occurrence of major bleeding requires immediate medical attention. The established specific treatment for Acenocoumarol overdose is the administration of Vitamin K, the specific reversal agent. In scenarios involving life-threatening bleeding, regulatory guidance specifies the urgent need for coagulation factor replacement using products like Prothrombin Complex Concentrate (PCC) or Fresh-Frozen Plasma (FFP). Continuous monitoring of the INR is required following acute ingestion or intervention until the coagulation status stabilizes. This official guidance establishes that uncontrolled bleeding or signs of hemodynamic instability necessitate contact with emergency medical services.

Therapeutic Uses of Синкумар

What Синкумар Treats: Main Uses and Benefits

Синкумар is an established oral anticoagulant, and its primary role is to provide long-term vascular protection by preventing the formation and growth of harmful blood clots, which are associated with conditions that create noticeable physiological strain. The therapeutic use of this medication is relevant across domains that include managing the risk of ischemic stroke in patients with Atrial Fibrillation; supporting the prevention of recurrence following an episode of Deep Vein Thrombosis (DVT) or Pulmonary Embolism (PE); and functioning as prophylaxis for individuals with mechanical prosthetic heart valves.

Key Therapeutic Applications

This therapeutic domain addresses the risk associated with various cardiovascular issues. Синкумар is used for managing the risk associated with the progression of existing clots and the formation of new ones. This supports the management of difficult clinical episodes by contributing to the reduction of the overall complication load. This use provides supportive protection against the risk of systemic embolism and supports clinical stability during symptomatic phases.

Quick Fact: Relief for Vascular Risk
Protective Focus Reduction of high-risk vascular events.
Primary Benefit Helps manage the clinical burden by reducing the threat of stroke and embolism.
Contextual Use Applied for chronic conditions that present a persistent, heightened risk of clot formation.

Regulatory References

  1. NIH StatPearls overview on Anticoagulation

Eligibility and Restrictions for Use

Eligibility for Синкумар (Acenocoumarol) — Official Regulatory Information

Синкумар (Acenocoumarol) is an anticoagulant medication for which official regulatory labeling explicitly defines specific populations who must not use it, based on severe risk or compliance concerns.


Population Status Eligibility Classification (Official) Practical Implication
Pregnancy/Reproductive Status Contraindicated Use is prohibited in pregnant women due to high risk of fetal harm. Women of reproductive potential must use reliable contraception.
Hemorrhage Risk/Coagulation Contraindicated Use is prohibited in patients with conditions that pose a severe or uncontrollable risk of bleeding, such as hemorrhagic diathesis, major active bleeding (e.g., hemorrhagic stroke, severe GI bleed), and recent or pending major surgery (especially brain, spine, or eye).
Organ Function/Compliance Contraindicated Prohibited in cases of severe hepatic or renal impairment. Use is also prohibited in patients who are unsupervised or unable to cooperate with required continuous monitoring (e.g., alcoholics, patients with psychiatric disorders or dementia).
Co-morbidities Contraindicated Use is prohibited with conditions such as severe uncontrolled arterial hypertension, peptic ulcers (active), acute pericarditis, or pericardial effusion.

Age-Related Eligibility: Use in the pediatric population is generally not established. Elderly patients (typically those 65 years and older) require special caution and close monitoring due to an increased sensitivity to the drug and higher bleeding risk, though use is not formally contraindicated solely by age.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Official regulatory information organizes the interaction profile of Acenocoumarol (Синкумар) around substances that either potentiate its anticoagulant effect or alter its systemic exposure.

High-Risk Combinations and Restrictions

Co-administration with agents that share an action on haemostasis is officially documented as not recommended due to the increased risk of hemorrhage. This classification includes drugs such as Heparins, Antiplatelet Agents (like aspirin or clopidogrel), and Non-Steroidal Anti-inflammatory Drugs (NSAIDs). If co-administration with these high-risk substances is deemed necessary, official regulatory documents mandate more frequent coagulation testing to monitor the interaction outcome.

Exposure-Altering Interactions

Interactions that alter Acenocoumarol’s plasma concentration are primarily mediated by cytochrome P450 (CYP) enzymes, particularly CYP2C9. Inhibitors of these enzymes (e.g., Amiodarone, Azole Antifungals) reduce the drug's clearance and can enhance the anticoagulant effect. Conversely, Inducers (e.g., Phenobarbital, Rifampicin, Carbamazepine) increase metabolism, leading to decreased anticoagulant effect.

Interaction Type Examples (Regulatory-listed) Official Outcome
Pharmacodynamic (Additive Risk) Antiplatelet agents, NSAIDs, other Anticoagulants Increased risk of haemorrhage
Metabolic Inhibition (PK) Amiodarone, Fluconazole, Chloramphenicol Enhanced anticoagulant effect (Increased exposure)
Metabolic Induction (PK) Phenobarbital, Rifampicin, St John's Wort Decreased anticoagulant effect (Reduced exposure)

Food, Supplements, and Population Notes

The effect of Acenocoumarol is officially reduced by the intake of dietary Vitamin K [Source 2.3]. Excessive alcohol consumption is documented to enhance the anticoagulant effect, while chronic alcohol use may decrease it [Source 3.1]. In patients with hepatic impairment, interactions may be more clinically significant due to compromised drug clearance [Source 2.2].

Mechanism of Action

Inhibition of the Vitamin K Recycling Cycle

Синкумар (Acenocoumarol) works by acting as an inhibitor of the Vitamin K Epoxide Reductase (VKOR) enzyme complex, located in the liver. This molecular blockade prevents the essential recycling of inactive Vitamin K back into its active cofactor form, Vitamin K Hydroquinone, which is required for the subsequent steps of coagulation.

Attenuation of Clotting Factor Activation

The depletion of the active Vitamin K cofactor causes a failure in the liver's ability to properly finish and activate the Vitamin K-Dependent Clotting Factors (II, VII, IX, and X). The liver releases these factors as non-functional proteins into the blood, directly leading to an overall systemic decrease in functional clotting activity.

Delayed Physiological Effect and Constraints

The full systemic hypocoagulability is delayed (taking 24–72 hours) because the mechanism only affects newly synthesized factors and must wait for the clearance of existing, active ones. Furthermore, the mechanism’s responsiveness can be fundamentally constrained by genetic variations in the VKORC1 enzyme, leading to altered individual responsiveness to the drug's mechanism.

Dosage and Administration Information

How to Use Синкумар (Acenocoumarol)

The administration of Acenocoumarol is guided by a dynamic, laboratory-controlled protocol based on the patient's individual coagulation status. The medication is supplied as an oral tablet for administration by swallowing. The daily dosage is typically taken as a single dose once daily and is administered at the same time each day to maintain predictable blood concentrations.


Standard Dosing and Monitoring Protocol

The dosage for Acenocoumarol is not fixed; it is individualized based on the results of the International Normalised Ratio (INR), a measure of blood clotting time. Standard regimens may start with a loading phase (such as 6 mg on Day 1, followed by 4 mg on Day 2) or a non-loading dose of 2 mg/day to 4 mg/day. The typical maintenance range is between 1 mg/day and 8 mg/day, adjusted after INR monitoring in the initial phase. Long-term maintenance involves periodic INR testing, often conducted at least once a month.


Administration Guidance

Instruction Type Standard Guidance
Route & Preparation Administered orally. The tablet is typically swallowed whole with water.
Missed Dose If a dose is missed, it is generally taken as soon as possible on the same day. The daily dose is not doubled the following day.
Special Populations Older adults may require a lower daily dose. Dosage in patients with hepatic impairment is closely managed.
Discontinuation Cessation of therapy often requires gradual dosage tapering before treatment is fully stopped.

This structured, INR-dependent approach governs the initiation, maintenance, and conclusion of Acenocoumarol therapy.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Синкумар (Acenocoumarol)

Research Evidence for Using Синкумар in Atrial Fibrillation

Синкумар, as a Vitamin K Antagonist (VKA), was studied for its use in studies of stroke and systemic embolism in patients with Atrial Fibrillation. The research includes large observational studies and systematic reviews that contextualize the use of the VKA class. A key measurement in these studies is the Anticoagulation Quality, which describes the Time in Therapeutic Range (TiTR)—how long a patient's blood thinning level stays within the specific target zone. Findings describe patterns observed in these studies, particularly when evaluating cohorts of older adults.

Research Evidence for Treating and Preventing Venous Thromboembolism (VTE)

Синкумар was evaluated in studies that explored its application in studies exploring outcomes related to venous thromboembolism (VTE) and its recurrence, which includes Deep Vein Thrombosis (DVT) and Pulmonary Embolism (PE). This research includes randomized controlled trials (RCTs) focusing on optimizing how the initial dosage is determined. The research examined the Anticoagulation Quality achieved, specifically the time needed to establish and maintain the International Normalized Ratio (INR) within the necessary range.

Studies for Patients with Mechanical Prosthetic Heart Valves (MPHV)

The use of Acenocoumarol in patients with mechanical prosthetic heart valves was studied for long-term prophylaxis, given that the VKA class has been widely studied for this indication. The evidence is largely derived from settings involving large national registry data and long-term observational studies. Research examined outcomes related to the achievement and maintenance of Anticoagulation Quality (TiTR) over many years.

What Remains Uncertain in the Research Landscape

Certainty remains low in specific areas. The need for more head-to-head randomized comparative evidence against other anticoagulant agents is an area where research is still developing for both stroke prevention and VTE use. Furthermore, due to the nature of VKA therapy, the evidence consistently highlights that variability in TiTR was associated with patient outcomes, and studies continue to explore methods to address this. The long-term effects are not fully established for every possible outcome across all special populations.

Key Studies & References Acenocoumarol and heparin compared with acenocoumarol alone in the initial treatment of proximal-vein thrombosis

Frequently Asked Questions (FAQ)

Common questions about Синкумар (FAQ)


Q: What are the official approved uses for Синкумар?

According to official regulatory documents, Acenocoumarol is prescribed to prevent and manage conditions caused by unwanted blood clots (thromboembolic disorders). Official indications include the management of conditions such as deep vein thrombosis (DVT) and pulmonary embolism (PE). It is also used to prevent clots in patients with heart rhythm issues like atrial fibrillation or those who have mechanical heart valve replacements.


Q: How is the action of Синкумар different from newer anticoagulant drugs (DOACs)?

Official pharmacological information shows that Acenocoumarol works indirectly by blocking the use of Vitamin K in the liver, which prevents the production of several clotting factors. In contrast, newer anticoagulants often work by directly targeting and inhibiting just one specific clotting factor. Both are used to reduce the blood’s capacity to clot.


Q: Is Синкумар the same class of medicine as Warfarin?

Official classification documents indicate that Acenocoumarol (Синкумар) and Warfarin are both part of the same pharmacological group. This group is known as Vitamin K Antagonists (VKAs), which are classified as oral anticoagulants.


Q: What does the acronym INR stand for, and why is it important when taking Синкумар?

INR is the acronym for the International Normalized Ratio. This is a standard laboratory test that measures how thin the blood is and how long it takes to clot. Official dosing protocols require the Acenocoumarol dose to be individually adjusted based on the INR value. Maintaining the INR within the target range is essential for therapeutic effect and patient safety.


Q: Can Синкумар cause unusual or excessive bruising?

Regulatory information states that the most frequent and dose-dependent adverse reaction is bleeding, or hemorrhage. Minor cutaneous bleeding, such as bruising, is recognized as a common sign of the drug’s intended anticoagulant effect. These bleeding events cover a spectrum, ranging from minor occurrences to more serious internal events.


Q: Which types of foods and drinks might interact with Синкумар?

Official sources indicate that foods high in Vitamin K can reduce the drug's effect. Additionally, alcohol consumption is documented to alter its impact. Specific patient warnings in regulatory materials mention that consumption of certain products, such as grapefruit juice and cranberry juice, may potentially enhance the anticoagulant effect.


Q: Is it true that cranberry products or grapefruit can affect Синкумар levels?

Yes, some regulatory and patient safety information specifically notes that certain fruit products, including cranberry products and grapefruit juice, have the potential to increase the blood-thinning effect. Because this enhancement could lead to an increased risk of bleeding, this is a topic to be reviewed with a health professional.


Q: How long does the effect of a single dose of Синкумар last in the body?

Pharmacokinetic data from official sources indicates that the half-life of Acenocoumarol is approximately 8 to 11 hours. However, its full effect on the blood's capacity to clot persists longer, lasting for about 48 hours. This is why consistent daily dosing is essential.


Q: Is there a known antidote or reversal agent for Синкумар?

Official documents confirm that the primary reversal agent for the effect of Vitamin K Antagonists is Vitamin K (Phytomenadione). In situations involving serious bleeding or overdose, other agents like Prothrombin Complex Concentrates (PCCs) are often referenced in clinical settings to rapidly restore the blood's clotting ability.


Q: What happens if my INR is consistently too high or too low?

Regulatory guidance indicates that a consistently high INR suggests an enhanced bleeding risk, and the dose is often reduced or paused. Conversely, an INR that is too low increases the risk of clot formation (thrombosis), which usually suggests the dose may need to be adjusted upward. Specific management strategies are determined by a health professional based on the level of deviation and the patient’s overall condition.


Q: What is the generally accepted therapeutic INR range for someone on Синкумар?

Clinical practice references indicate that the usual therapeutic target range for the INR is typically between 2.0 and 3.0 for most common uses like preventing clots due to atrial fibrillation or VTE. However, some specific high-risk indications, such as having a mechanical heart valve, may require a different, sometimes higher, target range.


Q: Does Синкумар contain coumarin, and is that the same as the natural compound found in cinnamon?

Regulatory classification states that Acenocoumarol is a synthetic compound that is chemically a coumarin derivative. While this makes it chemically similar to the coumarin found naturally in plants like cinnamon, it is important to know that the medication itself is not the natural compound. The drug's therapeutic effect is solely based on the manufactured active ingredient, Acenocoumarol.


Q: Why is it recommended to maintain a consistent diet while on this medicine?

Official patient education emphasizes a consistent diet because the drug's effect is directly countered by Vitamin K. Large and inconsistent swings in the intake of Vitamin K-rich foods can cause the INR blood test result to fluctuate outside of the desired range. Such fluctuation may lead to altered drug effectiveness or an increased bleeding risk.


Q: Can I take other over-the-counter pain relievers or cold medicines while on Синкумар?

Official regulatory warnings often state that pain relievers belonging to the NSAID class (such as Ibuprofen) should be avoided due to a significantly increased risk of bleeding. Even high doses or prolonged use of Acetaminophen (Paracetamol) may enhance the blood-thinning effect and require close INR monitoring. All over-the-counter medicines should be reviewed by a health professional before use to check for potential interactions.


Q: How long after stopping Синкумар does its blood-thinning effect typically wear off?

Because the drug's effect relies on the synthesis of new clotting factors, the anticoagulant effect may take several days to completely wear off after the last dose. The official approach for discontinuing therapy involves a gradual dosage tapering, and the exact time it takes for the effect to cease is dependent on the individual situation.


Q: What should a patient know about taking Синкумар before a planned surgery or dental procedure?

Official patient information advises that planned surgeries, including major dental procedures, require a special management strategy for the medication. This typically involves temporarily stopping or adjusting the dose a set number of days before the procedure. The specific plan is determined by the prescriber, who balances the risk of bleeding from the procedure against the patient's underlying risk of clot formation.


Q: What is the advice regarding breastfeeding while taking Синкумар?

Information from official medical databases suggests that Acenocoumarol passes into breast milk in very low, often non-detectable, amounts. For a healthy, full-term infant, its use during breastfeeding is generally considered to pose little risk. Consultation with a health professional regarding specific guidance is advised.


Q: Is it acceptable to take Синкумар with food, according to official guidance?

Patient information leaflets often state that it is generally acceptable to take Acenocoumarol either with or without food. The most important regulatory instruction is to take the medication as a single dose at the same time every day to maintain a consistent effect.


Q: What is calciphylaxis, and is it mentioned as a risk with Синкумар in official warnings?

Calciphylaxis is a serious, rare condition where calcium builds up in the small blood vessels of the skin and fat, potentially causing tissue death (necrosis). Regulatory labels for Acenocoumarol list this condition as a serious adverse reaction, though its frequency is noted as being unknown.


Q: What is the meaning of a 'transient ischemic attack' (TIA) in relation to Синкумар use?

A Transient Ischemic Attack (TIA) is a temporary block of blood flow to the brain, often called a mini-stroke. This medication is used to prevent systemic thromboembolic events, which include both strokes and TIAs. Its official use is to reduce the risk of such unwanted clots from forming.


Q: Can I take herbal teas or remedies while on Синкумар?

Regulatory information shows that many herbal products and remedies can interfere with the way Acenocoumarol works. For example, the herbal supplement St John's Wort is specifically listed as reducing the drug’s effectiveness. Due to the high risk of interaction, all herbal products should be reviewed by a health professional before use.


Q: Are there any specific lifestyle restrictions besides diet mentioned for patients taking Синкумар?

Yes, in addition to diet, official patient education emphasizes the need to avoid activities or sports that carry a high risk of injury or trauma, such as contact sports. The main focus is on injury prevention, as this medication is associated with an increased risk of bleeding, especially from falls or head injuries.


Q: How can I tell the difference between mild bruising and a serious bleeding issue related to Синкумар?

Official patient safety materials list several key warning signs that may indicate a serious bleeding event. These signs include blood in the urine or stool (which may appear black or tarry), persistent nosebleeds, coughing up blood, or any bruising that is unusually large, expanding, or occurs spontaneously.


Q: Is there research on the use of Синкумар in pediatric patients?

Official labeling states that the use of Acenocoumarol in children is not generally established. However, certain clinical studies have been conducted to investigate appropriate dosing and monitoring regimens in pediatric patients who require anticoagulation.

How should Синкумар be stored and disposed of?

Storage and Protection Requirements

Official regulatory documents define the mandatory storage conditions for Синкумар (Acenocoumarol) tablets. The medicine must be stored below 25 C to maintain its chemical stability and potency until the expiration date. It is required to keep the product in its original package to ensure protection from both light and moisture.

Child Safety and Disposal

As a crucial safety requirement, the medication must be stored out of the sight and reach of children at all times. Regarding the proper handling of waste, any unused or expired Синкумар must be disposed of in accordance with local regulatory requirements for pharmaceutical waste. The expiration date (EXP) is printed on the blister and the carton; the product must not be used after this date.

Attention! Always consult to a doctor or pharmacist before using pills or medicines.

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