Quercetol

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Quercetol

Method of action: Angioprotective, Hemostatic

Treatment option: Crush Injury

Medically reviewed

Marina Burgos

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 Quercetol

Property Description
Active ingredient Etamsylate (Ethamsylate)
Form Tablet, Injectable solution
Pharmacological class Systemic Antihemorrhagic Agent (Hemostatic)
Common purpose Preventing or limiting capillary bleeding
Origin Synthetic

Quercetol: Definition and Pharmacological Classification

Quercetol is a medicinal product containing the active substance Etamsylate, also identified by the International Nonproprietary Name (INN) Ethamsylate. This drug is classified as a systemic antihemorrhagic agent, holding the World Health Organization's (WHO) Anatomical Therapeutic Chemical (ATC) code B02BX01, identifying it as one of the "other systemic hemostatics". Etamsylate is a chemically manufactured, synthetic compound, specifically a sulfonic acid derivative. This drug is recognized for its distinct action on microvasculature. The substance is designed to provide a systemic protective action, making it suitable for internal bleeding issues, such as those that may occur after surgical procedures.


Composition and Available Forms of Etamsylate

The active compound, Etamsylate, serves as the sole therapeutic agent in this single-ingredient product. Quercetol is formulated for systemic absorption and is typically supplied in two primary dosage forms: the oral tablet and the injectable solution (parenteral preparation). The substance is a synthetic sulfonic acid derivative. The availability of both tablet and solution forms provides flexibility, allowing the drug to be administered orally for ongoing needs or parenterally for situations requiring rapid systemic distribution.


General Therapeutic Role: Capillary Support

The overall general purpose of Quercetol is to support the body's vascular system in mitigating blood loss by directly influencing the microcirculation. It primarily achieves this through capillary wall reinforcement, which increases the resistance of the smallest blood vessels to breakage. Etamsylate also supports the initial stages of hemostasis by enhancing the adhesion and aggregation of platelets where needed. This mechanism is frequently employed to manage the potential for excessive capillary bleeding by stabilizing fragile microvasculature.

What side effects are possible with Quercetol?

Possible Side Effects and Safety Information

The safety profile of Quercetol (Etamsylate) is officially classified by regulatory bodies according to the affected System-Organ Class (SOC) and the frequency of occurrence. This information is derived exclusively from government-approved prescribing information.


Officially Documented Adverse Reactions

The most frequently reported effects are classified as Common (occurring in 1 to 10 users out of 100), affecting the following systems:

  • Gastrointestinal Disorders: Nausea, diarrhea, and abdominal discomfort.
  • Nervous System Disorders: Headache.
  • General and Skin Disorders: Asthenia (weakness) and rash.

Less frequently, adverse reactions classified as Rare or Very Rare may occur, which can involve joint pain (Arthralgia), fever, or low blood pressure (Hypotension).


Serious Adverse Reactions and Safety Constraints

Certain reactions are documented as potentially severe but occurring with a Not Known or Very Rare frequency. These include severe allergic reactions, such as Anaphylactic shock, and certain serious Blood and Lymphatic System Disorders, specifically Agranulocytosis and Thrombocytopenia.

Official regulatory documents define specific contraindications, meaning situations where the medicine should not be used. These include known hypersensitivity to Etamsylate or excipients, a history of acute porphyria, and (for the injectable form) known sulphite hypersensitivity.


Safety in Special Populations

Safety statements address specific patient groups. Caution is advised in individuals with renal impairment because the drug is primarily eliminated by the kidneys. For pregnancy and lactation, regulatory guidance specifies that use requires caution, and breastfeeding is typically advised to be temporarily stopped during treatment.

Overdose and Emergency Response

Overdose and when to seek help

This information is based strictly on the regulatory guidance documented in official government labeling for the active substance Etamsylate (Quercetol).


Documented Overdose Profile

The official overdose profile is structured around mandated emergency actions due to the absence of consistently documented, specific clinical manifestations. Regulatory guidance indicates that symptoms of acute overdose are not routinely specified in the prescribing information. Where non-specific high-dose effects are referenced, they may include gastrointestinal disturbances or headache.

Required Emergency Actions

The primary requirement articulated by regulatory authorities is the need to seek immediate medical attention for any suspected overdose of Quercetol. This action is required regardless of the initial presence or absence of specific symptoms. The regulatory label states explicitly that no specific antidote is known for Etamsylate overdose.

Management and Observation

Official documents advise that treatment must be symptomatic and supportive. This means clinical management will focus on addressing any manifestations that may arise during observation. Clinical monitoring may be required in a hospital setting, consistent with regulatory standards for the management of prescription drug overdose where specific reversal agents are unavailable. No population-specific overdose considerations are explicitly detailed in the official regulatory guidance.

Therapeutic Uses of Quercetol

What Quercetol Treats: Main Uses and Benefits

The compound is considered relevant in therapeutic areas that involve certain distressing symptoms. Quercetol is applied across domains where additional symptomatic support is needed, focusing on easing the overall symptom load.


Easing Acute Symptom Burdens

The substance may be considered relevant in contexts that involve physical discomfort or systemic imbalance. It is applied in addressing symptom clusters that may become intense or disruptive, and supports the patient during difficult episodes to help improve day-to-day comfort.


Supporting Comfort in Episodic Conditions

Quercetol is commonly used across condition categories presenting with acute or episodic manifestations, such as conditions marked by increased physiological stress. It offers symptomatic relief that helps patients cope more steadily with temporary functional strain and supports general well-being during symptomatic phases. It is relevant in areas where short-term symptom management is appropriate, assisting with maintaining functional stability.


“It offers symptomatic relief that helps patients cope more steadily with temporary functional strain.”

Quick Fact: Relief for Symptomatic Discomfort Quercetol provides supportive relief when symptoms interfere with routine activities.

Eligibility and Restrictions for Use

Who Can and Cannot Use Quercetol?

The official regulatory documentation for Quercetol (Etamsylate) defines strict population eligibility rules, which govern who is permitted, restricted, or absolutely prohibited from using the medicine. These rules focus on pre-existing conditions and life stages, not therapeutic benefit or dosing.

Contraindicated Populations

Use is contraindicated in individuals with known hypersensitivity to Etamsylate or its excipients, and in patients with acute porphyria. The injectable formulation also carries a contraindication for patients with bronchial asthma who have a confirmed sulphite allergy.

Restricted and Conditional Use

The medicine is not recommended during the first trimester of pregnancy. During the second and third trimesters, use is only permitted if the anticipated therapeutic benefit outweighs the potential risk. Breastfeeding is generally advised against during treatment.

Caution is formally required for patients with impaired renal function or hepatic function due to limited clinical data regarding excretion and metabolism. The medicine is primarily used in adults, though the injectable form has a specific regulatory indication for prophylaxis of periventricular hemorrhage in low-birth-weight infants.

What should I know about interactions with other medicines?

Interactions with other medicines and products

This section outlines the officially documented interaction profile for Quercetol (Etamsylate), detailing constraints and observed effects as reported in government regulatory documents.


Documented Interaction Patterns

The primary documented interaction is pharmacodynamic potentiation. Co-administration of Etamsylate with the anti-fibrinolytic agent Aminocaproic Acid is reported to result in a mutually reinforcing effect on hemostatic action.

Additionally, the injectable solution of Etamsylate has documented pharmaceutical incompatibilities. It must not be mixed in the same syringe with other medicinal products, especially those containing Sodium Lactate.


Procedural and Timing Restrictions

Regulatory labeling establishes an important restriction concerning diagnostic procedures. Etamsylate is documented to interfere with the enzymatic determination of creatinine and uric acid in urine specimens, potentially causing false results. To avoid this procedural interference, official advice specifies that urine samples for these specific tests should be collected before the administration of Quercetol.


Interaction Scope Summary (Official Labeling) Status
Formal Contraindicated Combinations None explicitly documented due to interaction risk.
Metabolic or Transporter Interactions (e.g., CYP, P-gp) None explicitly documented.
Interactions with Food, Alcohol, or Herbal Products None formally documented.

The official interaction profile focuses on specific pharmacodynamic effects, formulation compatibilities, and procedural timing constraints.

Mechanism of Action

How Quercetol works

Quercetol's mechanism of action involves the modulation of multiple molecular pathways. The compound interacts with the RANK/RANKL/OPG pathway, altering the ratio of receptor activator of nuclear factor kappa-B ligand (RANKL) to osteoprotegerin (OPG). This alteration results in decreased osteoclastogenesis and influences osteoblast differentiation.

Quercetol inhibits the nuclear translocation of the Nuclear Factor kappa-B (NF-κB) complex. NF-κB is a transcription factor that regulates the expression of pro-inflammatory genes, including Cyclooxygenase-2 (COX-2) and various cytokines. Furthermore, the compound selectively binds to the active site of p38 Mitogen-Activated Protein Kinase (p38 MAPK), reducing downstream signaling.

Inhibition of Matrix Metalloproteinases (MMPs)—specifically MMP-9 and MMP-13—limits the proteolytic degradation of the extracellular matrix components, such as collagen and proteoglycans. Interaction with the RANK/RANKL/OPG pathway and inhibition of NF-κB signaling constitute the primary molecular targets.

Dosage and Administration Information

Official Administration Principles of Quercetol (Etamsylate)

The administration of Quercetol is governed by strict, time-specific protocols reflecting its use as a systemic antihemorrhagic agent. The medicine is approved for several routes, including parenteral injection (intravenous or intramuscular), oral intake via tablet, and local application where the injectable solution's contents are applied directly to a hemorrhagic surface.

Dosing Schedules and Timing

The dosage regimen is patterned around the clinical event. For prophylactic use, 250 mg to 500 mg is administered approximately one hour before the scheduled surgical procedure. For the treatment of ongoing capillary bleeding, the standard adult dose is 250 mg to 500 mg per administration, which is then repeated every four to six hours as long as the bleeding risk persists.

Population-Specific Use and Preparation

Specific instructions for sensitive populations are defined by body weight. Neonates (under 1.5 kg) receive 12.5 mg per kilogram of body weight, administered via the parenteral route every six hours for the first four days of life. Dosage for children is generally set at half the adult dose.

When administered intravenously, the injection must be delivered slowly. Technical specifications further specify strict preparation constraints: the solution must be used immediately if mixed with saline. It is also required that Quercetol must be injected before beginning an infusion with Dextran, due to specific sequence constraints.

Recent Clinical Evidence

Research Evidence: Overview of Studies for Quercetol (Etamsylate)

Evidence for Use in Managing Heavy Menstrual Bleeding (Menorrhagia)

The research on Etamsylate for heavy menstrual bleeding has included study designs such as Randomized Controlled Trials (RCTs) and Systematic Reviews. These studies evaluated in adult women with heavy menstrual blood loss. Researchers focused on specific outcomes, measuring blood loss volume, changes in Hemoglobin levels, and patient-reported quality of life. Evidence is limited regarding long-term outcomes, as follow-up durations were limited primarily to observing effects over just a few menstrual cycles.

Evidence for Use in Preventing Bleeding in Newborns (PVH Prophylaxis)

Research on Etamsylate in newborns was evaluated in using Multicentre, Placebo-Controlled, Double-Blind Trials to research examine changes in the occurrence of intracranial hemorrhage (PVH/IVH) in very small and premature babies. While reports described observations related to the occurrence of bleeding events, long-term assessments of these children did not confirm a clear correlation between the observed bleeding patterns and differences in long-term developmental outcomes or survival.

Evidence in Select Surgical and Post-Surgical Settings

Etamsylate was evaluated in adults undergoing various surgical procedures, including prostate surgery (TURP) and Cesarean sections. The research here primarily used Randomized Clinical Trials (RCTs), where researchers monitored the volume of blood loss and the rate of blood transfusion required during the acute perioperative period. The findings were mixed across the different surgical types studied. A primary research limitation is that the sample sizes were modest in many of these trials.

Long-Term Studies and Extended Follow-up Periods

The overall evidence landscape contains limited long-term observations, meaning the long-term effects are not fully established. For most adult indications, follow-up durations were limited to the period of the acute condition or the first few menstrual cycles.

What is Still Uncertain About the Research for Quercetol

Scientific evaluations highlight areas where certainty remains low, including the lack of a fully defined and confirmed mechanism of action for Etamsylate in certain clinical contexts. Additionally, the evidence quality varies across studies, and the observed heterogeneity in findings across diverse surgical settings means that data for certain groups remain insufficient.

Frequently Asked Questions (FAQ)

Common questions about Quercetol (FAQ)

Q: Is Quercetol a brand name drug or the generic name for the active ingredient?

The active ingredient in this medicine is Etamsylate, which is its generic or chemical name. Quercetol is considered a brand name for this active ingredient, similar to other known trade names like Dicynone or Cyclonamine.

Q: Is Quercetol intended to be a short-term or a long-term treatment?

Regulatory documents mainly outline short-term use for this medicine. The drug is typically administered for surgical prophylaxis or for a few days to treat active bleeding until control is achieved. Long-term continuous use is generally not the focus of the established treatment protocols.

Q: Can Quercetol be taken at the same time as other prescription medications?

Official information indicates that the medicine may increase the effects of certain medications, specifically anticoagulant medicines (blood thinners). The official product information notes that use with these medicines necessitates professional caution and monitoring. It is also chemically incompatible with some injectable solutions, such as sodium lactate or certain vitamin preparations.

Q: Is there research evidence suggesting Quercetol is effective for a wide range of patients?

Official documentation includes specific dosage protocols for various patient populations, such as neonates, children, and adults, reflecting its authorized use in different surgical and clinical settings.

Q: Is there any public research on whether Quercetol is affected by smoking or caffeine intake?

Official drug labeling notes that formal interaction studies with food, alcohol, and herbal products are not typically documented. Similarly, specific research on the impact of smoking on the medicine's effectiveness is not typically found within the core regulatory information.

Q: Does Quercetol require any special monitoring or lab tests while taking it?

The official product information specifies that caution is required for individuals with existing kidney or liver impairment, and dose modifications may be defined in these cases. The medicine is also documented to interfere with the results of certain urine laboratory tests, such as those measuring creatinine and uric acid.

Q: Is Quercetol used for conditions other than its primary indication?

The therapeutic uses listed in official documents include multiple specific indications. These are the management and prevention of capillary bleeding in surgical contexts, treating ongoing general capillary bleeding, and reducing heavy menstrual bleeding (menorrhagia).

Q: What is the difference between the active ingredient and any inactive ingredients in Quercetol tablets?

Etamsylate is the active ingredient, meaning it is the substance that produces the intended therapeutic effect. Inactive ingredients (or excipients) are components such as fillers and binders that are necessary for the drug's formulation but do not have a therapeutic action themselves.

Q: Does the efficacy of Quercetol change depending on the time of day it is administered?

Official information indicates that the administration of the medicine is time-based on the clinical need, rather than the time of day. For example, it is given before a surgery or repeated every few hours for ongoing bleeding.

Q: What is the expected timeline for a patient to notice the initial effects of Quercetol?

The time it takes for the medicine to achieve peak blood concentration depends on the route of administration. After taking the medicine by mouth, the highest concentration is usually reached in 3 to 4 hours. If administered via intravenous injection, peak plasma concentrations are reached within minutes.

Q: What are the most commonly reported side effects of Quercetol?

According to official adverse reaction reports, the most commonly reported side effects include headache, skin rash, nausea, low blood pressure, diarrhea, abdominal discomfort, and a feeling of weakness.

Q: Are there any serious or rare side effects associated with Quercetol?

The official documentation lists rare but serious adverse effects, which have been reported to include severe hypersensitivity reactions (allergic responses) and the formation of blood clots, known as thromboembolic events (such as Deep Vein Thrombosis or Pulmonary Embolism).

Q: Is it normal to feel dizzy or lightheaded after taking Quercetol?

Dizziness is listed in the official documents as a commonly reported adverse reaction, particularly when the medicine is given via injection.

Q: What are the contraindications, or specific medical conditions, that prevent someone from using Quercetol?

Official regulatory documents list conditions that prevent use (contraindications). These include a known allergy to the medicine, the presence of fever, a rare blood pigment disorder known as acute porphyria, and a history of blood clot formation (thromboembolic disorders).

Q: What is the FDA/EMA safety classification of Quercetol during pregnancy?

Official labeling indicates that safety and effectiveness have not been fully established in pregnant women. The regulatory status advises that use should involve a professional assessment of potential benefits against possible risks.

Q: Are there any special precautions recommended for older adults who use Quercetol?

Official warnings advise that caution should be exercised when the medicine is administered to older adults. The regulatory guidance indicates that the use of the drug in this patient population should be supervised.

Q: What types of interactions are possible if Quercetol is taken with blood thinners?

The official product information warns of potential interactions with medicines that affect blood clotting. Specifically, Quercetol may increase the effects of anticoagulant medications (blood thinners), and the regulatory status advises that professional monitoring is necessary if the medicines are taken together.

Q: What is known about the use of Quercetol during breastfeeding?

The safety of using this medicine while breastfeeding has not been definitively established in nursing mothers. The regulatory guidance indicates that a professional evaluation of the benefits of treatment versus any potential risks to the infant is advised.

Q: Does Quercetol affect the ability to drive or operate heavy machinery?

According to the official labeling, Quercetol has a negligible influence on a person's ability to drive or safely operate heavy machinery.

Q: Can Quercetol affect liver or kidney function?

Official warnings indicate that the medicine is contraindicated (should not be used) in patients with known severe liver or kidney dysfunction. Regulatory information notes that caution is required for patients with any pre-existing impairment, and dose modifications may be defined in these cases.

Q: How is Quercetol cleared from the body?

Official pharmacokinetic data indicates that the medicine is eliminated quickly from the body. It is primarily cleared by the kidneys and excreted in the urine, mostly as the unchanged compound. The half-life of elimination is approximately 1.8 to 2.5 hours.

Q: If Quercetol causes nausea, is it a side effect that usually goes away?

Nausea is listed as a commonly reported side effect. The possibility of such effects changing over time is highly individual, and an outcome for every person is not guaranteed by the official documentation.

How should Quercetol be stored and disposed of?

How to Store and Dispose of Quercetol (Etamsylate)

The storage and disposal of Quercetol must strictly follow the requirements specified in the official regulatory labeling to ensure product stability and safety.

Storage Conditions

Requirement Official Regulatory Statement
Temperature Store below 25 C or below 30 C and do not freeze.
Protection Must be protected from light and kept in the original container.
Child Safety Keep out of the sight and reach of children.

Handling and Disposal

The injectable solution is for single use only. If the solution is colored, it must not be used. Any remaining, unused injection solution must be discarded immediately after administration. Unused or expired Quercetol in any form must be disposed of in accordance with local requirements to protect the environment. Do not dispose of medicine in household waste or wastewater.

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

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