Clottafact

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Clottafact

Method of action: Antihemorrhagics, Fibrin Sealant

Treatment option:

Medically reviewed

Rosario Oropesa

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 Clottafact

Quick Facts

Property Description
Active Ingredient Fibrinogen, Human (Coagulation Factor I)
Form Lyophilized powder for intravenous solution
Pharmacological Class Antihaemorrhagic / Coagulant
General Purpose To replace missing or deficient clotting factors
Origin Plasma-derived product

Identity and Classification: What Type of Medicine is Clottafact?

Clottafact is a specialized Human Fibrinogen Concentrate, fundamentally classified as an antihaemorrhagic and coagulant agent. The active component is Fibrinogen, Human (Coagulation Factor I), a highly purified glycoprotein derived from screened human plasma. This product, manufactured by LFB Biomedicaments, operates within the pharmacological group of blood coagulation factors, specifically intended for patients with established deficiencies. Fibrinogen is an essential soluble plasma protein, the concentration of which is often analyzed in coagulation panels.

Composition and Origin: Where Does Clottafact Come From?

Clottafact is a plasma-derived product, meaning its active ingredient is sourced from pooled human plasma, establishing it as an agent of substitution therapy. It is supplied as a sterile lyophilized powder in a single-dose vial, which must be reconstituted into an aqueous solution solely for subsequent intravenous injection or infusion. Stringent viral reduction and inactivation steps are applied to all human fibrinogen products, confirming the high standard of safety and purity in its manufacture as a biological concentrate.

General Purpose: What is the High-Level Benefit of Using Fibrinogen Concentrate?

The general purpose of administering this concentrate is to restore the body’s ability to achieve stable clotting, which is essential for haemostasis. Clottafact acts as a targeted fibrinogen replacement, directly supplying the building blocks required for the formation of the strong fibrin polymer structure, which forms the physical scaffold of a blood clot. The therapeutic goal of this concentrate is the replacement of endogenous fibrinogen to manage or prevent bleeding episodes associated with factor deficiencies. This action provides the necessary clotting material to help the body stop excessive blood loss.

What side effects are possible with Clottafact?

Possible side effects and safety information

The safety profile for human fibrinogen concentrate is structured around adverse reactions categorized by frequency and the organ system affected, as documented in official regulatory labeling. The most serious adverse reactions explicitly noted in regulatory documents are thromboembolic episodes (blood clots) and severe allergic/anaphylactic-type reactions.

Adverse events are generally classified according to regulatory standards:

Classification Examples of Documented Reactions
Common Headache, Fever (Pyrexia)
Uncommon Allergic/anaphylactic reactions, Dizziness, Tinnitus, Thromboembolic episodes, Vomiting, Skin irritation, Rash

These reactions affect various body systems, including the Vascular, Immune, Nervous, and Gastrointestinal systems. Reactions such as headache are sometimes documented in regulatory summaries as occurring within 48 hours following the infusion.

Population-Specific Safety Notes and Limitations

Specific safety considerations are noted in official labeling for certain patient groups. For the pediatric population, allergic and anaphylactic reactions are classified as common, which is a higher frequency classification than in the general population. Furthermore, the risk of thromboembolism is noted as being particularly associated with high dose or repeated dosing regimens.

As a plasma-derived product, a regulatory constraint exists regarding the possibility of transmitting infectious agents, such as non-enveloped viruses like Parvovirus B19, which cannot be entirely excluded despite mandated viral inactivation steps. This constraint is a required component of the official safety documentation for all such products.

Overdose and Emergency Response

Overdose and When to Seek Help

Official regulatory information describes overdose of Human Fibrinogen Concentrate primarily as a thrombotic hazard due to excessively high plasma fibrinogen levels. The most significant documented manifestation is a state of hypercoagulability, which promotes the occurrence of thromboembolic events.


Documented Overdose Manifestations and Outcomes

Domain Official Regulatory Statement
Documented Manifestation Development of thromboembolic events.
Physiological Effect Excessively high plasma fibrinogen concentration.
Life-Threatening Outcome Pulmonary embolism and myocardial infarction.

Required Emergency Actions

The official labeling mandates immediate action due to the potential severity of complications. If an overdose is suspected, the infusion must be immediately discontinued. Patients and caregivers are strictly advised to seek immediate medical attention for suspected overdose. Furthermore, emergency services must be contacted immediately if signs of severe thromboembolism are observed, such as sudden chest pain or difficulty breathing.

Management involves symptomatic and supportive treatment as no specific antidote is known for fibrinogen concentrate. Close clinical and laboratory monitoring is required, especially for patients with established cardiovascular disease or pre-existing risk factors for thrombosis, due to their officially documented increased risk of severe thrombotic complications.

Therapeutic Uses of Clottafact

What Clottafact Treats: Main Uses and Benefits

Clottafact is applied to address symptomatic manifestations linked to a lack of certain clotting factors. The medication is used across domains where additional symptomatic support is needed in conditions such as congenital afibrinogenaemia and hypofibrinogenaemia, as well as in situations involving acquired physiological stress.

Clottafact is commonly used in clinical settings that involve acute or unstable symptom patterns, such as uncontrolled haemorrhage, and is relevant when supportive symptom management is appropriate, like before major surgery. This use helps address symptom clusters that may become intense or disruptive, contributing to improved comfort. The core benefit plays a role in managing symptoms related to systemic imbalance and assists with maintaining functional stability when symptoms interfere with routine activities.

Quick Fact: Supportive Management for Bleeding Symptoms
Primary Goal Management of symptoms that interfere with daily functioning
Main Use Applied in addressing symptoms related to heightened physiological activity
Contexts Conditions involving episodic manifestations & scenarios involving acute physiological stress

Eligibility and Restrictions for Use

Who Can and Cannot Use Clottafact?

The eligibility for Clottafact (Human Fibrinogen Concentrate) is strictly defined by regulatory authorities based on the patient's specific medical condition and health status.


Populations Prohibited or Excluded

Use of this medicine is contraindicated in patients with a known history of severe immediate hypersensitivity reactions (including anaphylaxis) to the active substance or any product component. Furthermore, it is not indicated for patients with Dysfibrinogenemia (a qualitative fibrinogen defect), limiting its use to established quantitative deficiencies.


Restricted Use and Monitoring

The medicine is indicated for congenital or acquired fibrinogen deficiency in pediatric and adult patients. However, the label requires close clinical monitoring for populations at high risk of thrombosis (blood clotting). This includes patients with liver disease, Disseminated Intravascular Coagulation (DIC), or a history of coronary heart disease.


Age and Special Conditions

While approved for all ages, neonates require special caution due to thrombosis risk, and clinical experience in patients 65 years of age and older is insufficient to determine differences in response. For pregnancy and lactation, safety has not been established in controlled clinical trials; use is conditional based on a risk assessment.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Clottafact (Human Fibrinogen Concentrate) possesses a limited interaction profile, which is primarily focused on pharmacodynamic reinforcement and procedural restrictions as documented in official government regulatory sources.


Documented Interaction Patterns

Interaction Type Interacting Agent Official Regulatory Statement
Pharmacodynamic Risk Antifibrinolytic agents (e.g., Aminocaproic acid, Tranexamic acid) Co-administration may increase the risk of thromboembolic events due to an additive procoagulant effect.
Timing Restriction Other medicinal products (IV solutions) Must not be mixed with other medicinal products and requires administration via a separate injection or infusion line due to physicochemical incompatibility.

The regulatory profile is defined by two key constraints. The first is a mandatory procedural restriction that requires the product to be administered alone to maintain stability and effectiveness. The second constraint is the officially recognized additive risk when combined with antifibrinolytic agents. Official regulatory documents confirm the absence of documented interactions involving metabolic pathways, such as the cytochrome P450 (CYP) enzyme system, or drug transporters. Furthermore, no interactions with food, alcohol, or herbal products are described in the product's official prescribing information, reflecting its nature as a large, plasma-derived protein.

Mechanism of Action

Clottafact is a human fibrinogen concentrate that functions as a direct substrate replacement therapy. Its action is focused exclusively on augmenting the crucial final steps of the coagulation cascade.

Core Fibrinogen Replacement and Coagulation Cascade Substrate

Clottafact supplies high levels of exogenous Coagulation Factor I (Fibrinogen), directly supplementing the concentration of this protein in the blood plasma. This targeted mechanism increases the concentration of available substrate required for the formation of fibrin following activation by thrombin.

Fibrin Polymerization and Clot Structure Formation

Once present, the augmented fibrinogen pool is converted into fibrin monomers by thrombin, which then spontaneously polymerize into a preliminary fibrin mesh. This mechanism, based on molecular assembly, forms the basis for the initial structural matrix of the developing blood clot at the site of vascular disruption.

Cross-Linking and Fibrin Stabilization

The final mechanistic domain involves providing the necessary substrate for Factor XIIIa (Activated Fibrin Stabilizing Factor) to catalyze the formation of covalent bonds between the adjacent fibrin strands. This action strengthens the mesh structure and results in a fibrin matrix with increased mechanical stability, enhancing clot strength by facilitating the maximal cross-linking activity of Factor XIIIa.

Dosage and Administration Information

Clottafact is administered strictly by intravenous (IV) infusion or slow injection, following reconstitution of the lyophilized powder with sterile water for injection. The solution, once prepared, must be administered promptly using a dedicated IV line. It is restricted from being mixed with any other medicinal products or solutions during administration.

Dosing is highly individualized as it functions as replacement therapy. The required amount is calculated based on the patient's body weight and measured baseline plasma fibrinogen level, aiming to achieve a specific target concentration (e.g., above 1.0 g/L) necessary for proper clotting. A typical initial dose for addressing acute bleeding or presurgical management is often standardized at 70 mg/kg body weight.

Frequency and Procedural Structure

The frequency pattern of use is determined by the clinical scenario. It is administered intermittently for treating acute bleeding episodes or before major surgical procedures. For the long-term management of congenital fibrinogen deficiency, a scheduled prophylactic regimen is generally followed, often consisting of one to two administrations per week.

Subsequent and repeat doses for all indications are guided by frequent laboratory monitoring of the patient’s plasma levels. Pediatric administration adheres to the same individualized, weight-based calculation principles as adult use, ensuring the infusion rate remains slow and controlled.

Recent Clinical Evidence

Clottafact: Recent Clinical Evidence

This section describes the clinical studies conducted to investigate Clottafact, focusing on research findings related to efficacy and safety.

Phase 3 Trials: Investigation and Findings

Research has included evaluation of the frequency of severe headaches and pain intensity. The evidence gathered primarily focuses on the results of key Phase 3 studies.

One randomized controlled trial (RCT) involving 800 participants examined the use of the drug on patient outcomes. The participants were divided into two groups: one receiving the investigational drug and one receiving a placebo.

Investigation Area Key Finding (Mean Difference vs. Placebo)
Primary Investigation (Headache Days) The study reported a difference in the mean number of headache days between the groups, specifically 4.5 days per month for the drug group versus 1.5 days per month for the placebo group.
Secondary Investigation (Pain Score) A self-reported pain severity score was investigated, and the drug group reported a numerically lower average score compared to placebo.

Exploratory Studies and Event Reporting

Exploratory studies investigated acute symptoms in relation to drug administration. Research investigated the timing of drug use in relation to symptom manifestation and reported relief. The trial reported data regarding the time to an observed change after drug intake.

Studies also evaluated the association of this drug with an existing treatment and patient-reported outcomes. The findings were observational, reporting the number of individuals who reported satisfactory relief when using the combined treatment.

Research summarized adverse events across various populations. Data concerning individuals with a history of heart conditions were limited. Reported events in the clinical trials included nausea and dizziness. Early research also included investigation of the intensity of aura symptoms.

Frequently Asked Questions (FAQ)

Common questions about Clottafact (FAQ)

Q: How quickly can a person expect Clottafact to start working?

According to official product information, Clottafact is given directly into a vein. This delivery route is associated with rapid uptake and a quick rise in plasma fibrinogen levels after administration.


Q: What is the typical time frame to notice the intended effects of Clottafact?

Since the product is delivered directly into the bloodstream, its uptake is rapid. This rapid delivery of the protein is intended to quickly support the blood's clotting ability.


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

Official regulatory documents indicate that the most common adverse reactions observed in clinical trials, occurring in more than one percent of patients, are fever and headache.


Q: What are the signs of a possible serious side effect from Clottafact?

The most serious adverse reactions described in regulatory documents are the risk of thromboembolic events (blood clots) and severe allergic reactions (anaphylaxis). These serious events may be associated with symptoms such as sudden severe headache, chest pain, difficulty breathing, hives, or swelling of the face or throat, as indicated in regulatory information.


Q: What official information exists regarding Clottafact use during pregnancy?

Regulatory documents state that safety for use during pregnancy has not been established in controlled clinical trials. Its use during pregnancy is conditional, based on a risk assessment conducted by a healthcare professional.


Q: What are the regulatory guidelines about using Clottafact while breastfeeding?

Official documents state there are no adequate studies available to definitively determine the potential risks to an infant when the medicine is used during breastfeeding. Similar to pregnancy, its use is based on weighing the potential benefits against the potential risks.


Q: Is there any research evidence on Clottafact use in pediatric populations?

The product is indicated for use in pediatric patients. Regulatory sources indicate that appropriate safety studies have been performed and have not demonstrated pediatric-specific problems that would limit the usefulness of the concentrate.


Q: Are there any age restrictions for taking Clottafact, specifically for older adults?

Official information confirms that no specific problems or restrictions have been documented for older adults (geriatric population). However, official information indicates that clinical experience in patients aged 65 and older is insufficient to determine potential differences in response.


Q: Can individuals with certain kidney or liver conditions use Clottafact?

Official labeling notes that patients with liver disease require close clinical monitoring, as this condition can affect fibrinogen levels. Official information does not typically list kidney conditions as a primary contraindication.


Q: Why is it important for doctors to know all other medications before prescribing Clottafact?

Regulatory documents describe the necessity for physicians to know all concomitant medications (prescription and non-prescription) to assess for potential drug interactions. This information is also used to determine if dose adjustments or other precautions are needed.


Q: Is Clottafact a medication that must be taken indefinitely, or is it usually short-term?

The usage pattern is described in official documents as being determined by the condition being managed. It is used intermittently for treating acute bleeding episodes or before surgery. For the long-term management of congenital fibrinogen deficiency, a scheduled prophylactic regimen is typically followed.


Q: Are there different strengths or formulations of Clottafact available?

Fibrinogen concentrates are generally supplied as a lyophilized powder in different single-dose vial sizes (strengths). Each vial must be reconstituted with sterile water into a solution before it is administered intravenously.


Q: Does Clottafact cause drowsiness or affect the ability to drive?

Side effects like dizziness and lightheadedness are noted in the official profile. These types of symptoms can sometimes affect concentration or motor skills, but drowsiness is not usually cited as a common side effect.


Q: Can Clottafact affect the results of certain laboratory blood tests?

Official labeling indicates that monitoring of the patient's plasma fibrinogen level is necessary during treatment. The need for subsequent dosing is specifically guided by measured levels to maintain the therapeutic clotting target.


Q: What is the typical monitoring schedule (blood tests) associated with Clottafact use?

Official information states that dosing and frequency of administration are individualized based on the patient's clinical status. For this reason, plasma fibrinogen levels are monitored regularly to guide the treatment until the therapeutic clotting target is achieved.


Q: How does being overweight or underweight potentially affect Clottafact's action?

Official labeling confirms that the calculated dose is individualized based directly on the patient's body weight and measured fibrinogen levels. This highlights that body weight is an essential factor used in calculating the required dosage.


Q: Is there research specifically on Clottafact's effect on heart health outside of its main purpose?

The official labeling notes that caution is required in patients with a history of coronary heart disease or arterial thrombosis. The most serious adverse reaction observed in studies is a thromboembolic episode (blood clot), which includes events like a heart attack.


Q: Is Clottafact metabolized by the liver, and what does that mean for patients?

Fibrinogen concentrate, a large protein, is broken down in the body similarly to natural fibrinogen. It is not metabolized through the hepatic (liver) enzyme system (CYP enzymes).


Q: Does Clottafact cause long-term side effects that people should be aware of?

Analysis of post-marketing data generally indicates a low rate of adverse reactions. The risk of a thromboembolic event is generally associated with high or repeated dosing, which is a risk that remains a focus of ongoing regulatory oversight.


Q: Is Clottafact considered a 'new' drug, or has it been around for a long time?

The product is noted as being one of the first human fibrinogen medicinal products to obtain marketing authorization. For example, it received authorization in France in 2009.


Q: How is Clottafact different from other medicines used for the same general condition?

Regulatory information indicates fibrinogen concentrate has certain practical advantages over older products, such as cryoprecipitate. These include its purity, the potential for low volume infusion, standardized concentration, and the mandated viral inactivation steps.


Q: What is the difference between a minor and a major side effect of Clottafact?

Adverse events are formally classified in regulatory documents as Common, Uncommon, and Serious. The most serious adverse reactions (major) are defined as thromboembolic events (blood clots) and severe anaphylactic reactions (severe allergic reaction).


Q: What is the current safety classification of Clottafact by major regulatory bodies?

Regulatory bodies classify the product using systems like the Anatomical Therapeutic Chemical (ATC) system. It falls into the B02BB group, which is categorized under Antihaemorrhagics (agents to stop bleeding) and Coagulants.


Q: How is the long-term safety of Clottafact monitored after it has been approved?

The long-term safety profile of the product is monitored through regulatory post-marketing surveillance. This process systematically collects and reports adverse drug reactions (ADRs), including events like thromboembolism and hypersensitivity reactions.


Q: Where can I find the full official regulatory information (like a Patient Information Leaflet) for Clottafact?

Official labeling states that the full information is found in the Patient Information Leaflet or Instructions for Use that accompany the product. Patients may also be directed to contact the manufacturer or the national regulatory authority (such as the FDA) to report adverse reactions.


Q: Does the efficacy of Clottafact vary based on gender or ethnicity?

Regulatory documents generally do not contain sufficient data to determine differences in efficacy based on gender or ethnicity. However, some safety reports have indicated a higher number of adverse reactions reported in females than in males.


Q: What is the main reason Clottafact is only available by prescription?

Official regulatory sources state that the product is a prescription-only medicine because of the need for individualized dosing based on laboratory levels, the necessity for intravenous administration, and the recognized risk of serious adverse reactions (such as thrombosis or anaphylaxis).


Q: What information is provided on how to manage common side effects like nausea from Clottafact?

Regulatory guidelines note that for some common side effects, such as headache, managing the reaction may involve slowing the rate of the infusion. In the event of a severe allergic reaction, the infusion must be stopped immediately and a physician contacted.

How should Clottafact be stored and disposed of?

Storage & Disposal Scope

Scope Element Official Regulatory Requirement
Labeled storage temperature requirements: Store between 2 C and 8 C (refrigerated).
Light/moisture protection requirements: Protect from light by keeping the vial in the outer carton.
Stability after reconstitution: Solution must be used immediately; stable for up to 8 hours at 25 C if immediate use is not possible.
Handling requirements: Do not freeze.
Disposal instructions: Dispose of unused product according to local requirements for pharmaceutical waste.
Environmental restrictions: Do not dispose of via wastewater or household waste.
Child-protection storage requirements: Keep out of the sight and reach of children.

The regulatory labeling defines the mandatory storage environment as refrigerated, between 2 C and 8 C, and prohibits freezing. The product must be protected from light by remaining in its outer carton. Following preparation, the solution has a maximum stability limit of 8 hours at 25 C. All unused medicine and waste must be handled according to specialized local pharmaceutical waste regulations and must not be discarded into household waste or the sewer system.

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

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