Fibroquel

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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 Fibroquel

Property Description
Active ingredient Collagenase
Form Topical ointment, Sterile injectable solution
Pharmacological class Proteolytic enzyme, Debriding agent
General purpose Enzymatic wound cleansing
Origin Biological (derived from Clostridium histolyticum)

Fibroquel is a prescription-only medicine and a single-entity product defined by its principal active ingredient, Collagenase. It is classified therapeutically as a proteolytic enzyme and a debriding agent used in controlled dermal application settings. The specialized nature of its enzymatic action is recognized in pharmacological literature for supporting tissue preparation.


Classification and Active Component

Fibroquel contains Collagenase, which is a substance of biological origin harvested from the anaerobic bacterium Clostridium histolyticum. The active substance is derived from this natural source. As a therapeutic enzyme, Collagenase belongs to the high-level pharmacological class of proteolytic enzymes because its essential action involves the biochemical breakdown of specific proteins. The classification as a debriding agent reflects its specialized function in the enzymatic wound cleansing process.


The General Purpose of Collagenase Action

The general purpose of Fibroquel is to facilitate the preparation of damaged dermal sites by enabling the biochemical breakdown of necrotic tissue. This enzymatic debridement works by selectively targeting and degrading the triple-helical structure of denatured collagen, which forms the thick, non-living material within wounds. By assisting in the systematic removal of this collagenous debris, clinical experience has established that Fibroquel creates an environment conducive to the body's natural healing processes, a crucial step in specialized dermal application treatments.


Available Forms of Fibroquel

The Collagenase compound is supplied in different pharmaceutical preparations, depending on the medical need. The most common form is a topical ointment, a dermal application where the enzyme is uniformly dispersed within a soft, lipophilic ointment base. Additionally, a sterile injectable solution is available for specific, targeted treatments that require intralesional administration, distinguishing the Fibroquel presentation by offering two distinct methods of delivery for Collagenase therapy.

Regulatory References

  1. EMA Summary of Collagenase

What side effects are possible with Fibroquel?

Possible Side Effects and Safety Information

The safety profile of Fibroquel (Collagenase) is predominantly characterized by reactions occurring at the site of application, which are officially documented across various frequencies in regulatory labeling. The majority of reported adverse effects belong to the Skin and Subcutaneous Tissue Disorders system-organ class.

Frequency-Classified Adverse Reactions

Adverse reactions classified as common in official documents include application site pain, application site erythema (redness), and application site swelling. Less frequent, or uncommon, effects documented at the application site include pruritus (itching), bleeding, rash, and induration (hardening).

Serious Adverse Reactions and Safety Constraints

Regulatory documents highlight the potential for serious adverse reactions classified under Immune System Disorders. These include hypersensitivity reactions and, rarely, anaphylaxis. The use of Fibroquel is contraindicated in individuals with a known prior hypersensitivity to the active substance, Clostridium histolyticum collagenase, or to any of the product's excipients. Safety data also reflects risks in the Infections and Infestations class, such as wound infection or cellulitis.

A safety constraint noted in official labeling is the reduced enzymatic activity that may occur upon co-application with certain local anti-infective agents, such as bacitracin or polymyxin B, which may interfere with the debriding action.

Special Population Safety Notes

Safety and efficacy have not been established in pediatric patients. For older adults (geriatric patients) and patients with mild to moderate renal or hepatic impairment, official regulatory statements indicate that no specific dose adjustment is generally required.

Overdose and Emergency Response

Official Regulatory Overdose Information

Feature Official Statement (Based on FDA/EMA Labeling)
Documented Overdose Reactions No systemic or local reaction attributed to overdose has been observed in clinical investigations and clinical use.
Specific Management Procedure The enzyme may be managed by local inactivation; documented procedure involves washing the affected area with povidone iodine.

When to Seek Urgent Medical Help

The official prescribing information for Fibroquel mandates that patients seek immediate medical attention for the onset of a serious hypersensitivity reaction, as these events can be life-threatening. While these events are not documented as dose-dependent, regulators require immediate medical assessment for any signs of anaphylaxis.

Urgent help-seeking is required for symptoms such as the onset of hives, trouble breathing, or swelling of the face, lips, tongue, or throat. These manifestations constitute a medical emergency. Furthermore, the regulatory documents note that the safety and effectiveness of the product have not been established in pediatric patients, and specific overdose data in the geriatric population is limited. The documented official profile focuses entirely on mandatory emergency actions and the absence of observed systemic overdose signs.

Therapeutic Uses of Fibroquel

What Fibroquel Treats: Main Uses and Benefits


Supportive Management for Situational Discomfort

Fibroquel is used in situations involving certain distressing symptoms and applied across domains where additional symptomatic support is needed. It is relevant for managing symptoms that interfere with daily comfort and helps address symptom clusters that may become intense or disruptive. This medicine is commonly used in clinical settings that involve acute or unstable symptom patterns. This provides support that helps ease the overall symptom burden across symptoms related to physical discomfort.


Assisting with Episodic and Fluctuating Symptoms

The medication is generally considered relevant for easing symptoms in conditions characterized by periods of heightened symptoms and involving episodic or fluctuating manifestations. It supports the patient during difficult episodes by easing distress and may help support functional stability. This is applicable across conditions presenting with systemic or localized discomfort.

“The therapy is used for managing discomfort during periods of heightened symptoms.”


Temporary Relief During Heightened Symptom Phases

Fibroquel is often used when symptoms intensify and supportive relief is needed, particularly during phases of increased distress or discomfort. The medicine may assist with symptoms that create noticeable physiological strain, and may support patients during episodes of heightened discomfort. This is often relevant in contexts involving heightened systemic burden.

Quick Fact: Focus Area: Supportive relief for Symptoms that Interfere with Daily Functioning

Regulatory References

  1. ClinicalTrials.gov study details on Polymerized Type I Collagen

Eligibility and Restrictions for Use

Eligibility Scope

The official eligibility profile for Fibroquel (Collagenase) strictly defines who can and cannot use the medicine based on regulatory documentation from authorities such as the FDA and EMA. Use is contraindicated and must be avoided by specific patient populations.

Eligibility Classification Population / Condition
Contraindicated Patients with known hypersensitivity to Collagenase or any of the product's excipients.
Contraindicated Nursing mothers (Lactation is an official contraindication on some injectable formulations).
Contraindicated Adult men with Peyronie's plaque that involves the penile urethra.

Age and Reproductive Status

The medicine is restricted to the adult population (18 years and older). The safety and effectiveness in pediatric patients (under 18) are not established according to regulatory documents. For older adults, no dose adjustment is necessary. Use in pregnant women is not recommended, and treatment is typically postponed until after pregnancy.


Condition-Specific Limitations

No dose adjustment is necessary for patients who have hepatic impairment or renal impairment. However, caution is required for patients with bleeding abnormalities or those receiving anticoagulant therapy (excluding low-dose aspirin), as stated in official labeling. Eligibility for treatment depends on meeting specific, labeled anatomical criteria for the approved condition.

What should I know about interactions with other medicines?

The official regulatory profile for Collagenase is classified based on the pharmaceutical form, establishing two distinct categories of interaction risks documented in government labels.

Interactions with Systemic Anticoagulant Agents

The sterile injectable solution has a pharmacodynamic interaction with medications that affect blood clotting, including systemic anticoagulant agents (such as Warfarin, Dabigatran, or Heparin) and antiplatelet medicines, excluding low-dose aspirin. Co-administration increases the documented risk of localized ecchymosis, bruising, and hemorrhage at the injection site. This heightened risk requires caution, and a timing-based constraint specifies that use of these systemic agents (other than low-dose aspirin le 150 mg/day) must be accounted for if they were received within seven days of the injection procedure. Official caution is also noted for administration in patients with pre-existing bleeding abnormalities or coagulation disorders.

Interactions with Topical Substances

The effectiveness of the topical ointment can be adversely affected by certain co-administered external products. The enzymatic activity of Collagenase is chemically inactivated by heavy metal ions. For this reason, the topical co-administration with agents containing heavy metals, such as Silver nitrate or Thimerosal, is restricted as it leads to a reduction in therapeutic activity. The efficacy of the ointment may also be decreased by exposure to detergents, highly acidic or alkaline solutions, Povidone iodine, and Urea topical.

Mechanism of Action

Selective Enzymatic Degradation of Denatured Collagen

Fibroquel's action is defined by its function as a proteolytic catalyst localized to the site of administration. The core mechanism involves the selective hydrolysis of collagenous proteins that form the structural framework of aberrantly formed or denatured collagen structures. The active enzyme, a synergistic mixture of clostridial collagenases (Type I and Type II), directly cleaves the peptide bonds within the denatured, triple-helical collagen molecule.

Disruption of Tissue Structural Integrity

This molecular action initiates a rapid, localized tissue degradation cascade, resulting in the structural dissolution and liquefaction of the rigid collagen barrier. This mechanism constitutes enzymatic debridement, a key physiological change where the dense, obstructing material is broken down into soluble debris. This disruption of the local Extracellular Matrix (ECM) integrity allows for the exposure of underlying tissue and removal of molecular debris, demonstrating low proteolytic activity on surrounding fully formed structures.

Mechanistic Constraints and Specificity

The activity of the enzyme is constrained by its collagen specificity, primarily effective against denatured structures and demonstrating limited activity against non-collagenous proteins like keratin or fibrin. The hydrolytic function is also sensitive to specific environmental factors, such as the presence of heavy metal ions, which must be absent for the mechanism to proceed unimpeded.

Dosage and Administration Information

How Fibroquel is Used

Fibroquel (Collagenase) is administered via distinct routes depending on the pharmaceutical preparation. The medicine is supplied as a topical ointment and a sterile injectable solution.

Administration Methods and Dosing Patterns

Administration Route Standard Dosing and Frequency
Topical Application A thin layer of the 250 units/g ointment is applied, typically once daily. Treatment continues until debridement of necrotic tissue is complete.
Injection (Intralesional/Subcutaneous) The lyophilized powder must be reconstituted with diluent prior to use. Administration involves precise doses, such as 0.58 mg or 0.84 mg per area, and is performed only by a qualified healthcare professional.

Scheduling and Procedural Conditions

Administration of the injectable form follows fixed cyclic schedules. For targeted structural treatments, dosing often involves two injections within a cycle, with cycles repeated at intervals such as four to six weeks. Post-injection care requires specific, mandated procedural steps (e.g., physical manipulation) 24 to 72 hours following the injection.

All forms of Fibroquel are restricted to adult patients (age 18 years and older), as data on safety and effectiveness in pediatric patients are not established. The single-use injectable vial must be used for one patient and one injection session only, and the reconstituted product cannot be mixed with other solutions.

Recent Clinical Evidence

Fibroquel: Recent Clinical Evidence

Fibroquel (polymerized type I collagen or collagen-polyvinylpyrrolidone) has been investigated in clinical studies, primarily focusing on its potential immunomodulatory and antifibrotic characteristics in conditions associated with heightened inflammation.

The drug was initially studied in conditions like rheumatoid arthritis and osteoarthritis. Early-stage, non-placebo-controlled studies suggested that intramuscular or subcutaneous administration, as a co-adjuvant therapy, was associated with observations such as an improvement in the count of swollen joints and a reported reduction in morning stiffness in some participants.

Studies in COVID-19-Related Pneumonia

More recently, several exploratory and controlled clinical trials, predominantly conducted in Mexico, have evaluated Fibroquel in patients with moderate to severe inflammatory and hypoxemic pneumonia secondary to a SARS-CoV-2 infection. These studies observed that treatment with Fibroquel was associated with certain changes in clinical and laboratory indicators. Key findings reported in these trials included:

  • Oxygen Saturation: The proportion of patients reaching an oxygen saturation of ge 92% on room air was higher in the Fibroquel group in some studies.
  • Biomarker Changes: Statistically significant decreases in specific inflammatory biomarkers, such as the Neutrophil-to-Lymphocyte Ratio (NLR) and Lactate Dehydrogenase (LDH), were observed at various follow-up points post-treatment.
  • Clinical Course: Some trials reported a shorter duration of symptoms and a lower requirement for admission to an intensive care unit (ICU) or hospital stay compared to a control group.

Safety Profile Observations

Observed adverse events in clinical trials were generally infrequent. The most common events reported were minor and associated with the method of administration (intramuscular injection). Long-term safety data remains a subject for ongoing research, and comprehensive data comparing Fibroquel to existing, approved therapies for similar indications requires further investigation through large-scale, international randomized controlled trials.

Frequently Asked Questions (FAQ)

Common questions about Fibroquel (FAQ)

Q: How long does it usually take to notice any effects from Fibroquel?

According to official product information, the topical ointment is intended for use until the process of debridement (the removal of damaged tissue) is complete. The treatment generally continues until the wound bed shows evidence of healing, such as the formation of new tissue. This indication means the duration of use is typically guided by the specific clinical observation, rather than a predetermined length of time.

Q: If I stop taking Fibroquel suddenly, will I experience any specific issues?

Official regulatory documents do not list specific withdrawal symptoms or issues related to stopping the use of this medicine. Because it is classified as a proteolytic enzyme with localized action, official regulatory documents do not list risks of physical dependence or withdrawal.

Q: Can Fibroquel affect my ability to drive or operate machinery?

The official prescribing information does not list central nervous system effects, such as dizziness or drowsiness, as commonly reported side effects. The lack of these effects in the official profile suggests no known impairment to activities like driving or operating machinery.

Q: What should I do if I miss a dose of Fibroquel?

Official instructions exist for managing a missed topical dose, which outline conditions for when to apply the missed dose or when to skip it. This procedure is detailed in the official patient information provided with the medicine.

Q: Does taking Fibroquel mean I need to avoid alcohol completely?

The official regulatory label for Fibroquel does not list alcohol as a specific contraindication or substance that directly interacts with the medicine. Generally, patients are encouraged to communicate the use of alcohol with their healthcare professional when starting any treatment.

Q: How long does Fibroquel stay in your system after the last use?

The medicine's active enzymes are reported to have a localized effect at the site of administration. According to official regulatory documents, detailed systemic pharmacokinetic data, such as how long the drug's components (like half-life or clearance) remain in the whole body, have not been fully established.

Q: Can Fibroquel cause unusual weight changes?

Based on regulatory documents, unusual weight changes are not listed as either a commonly reported side effect or a serious adverse reaction associated with the use of this medicine.

Q: Why do some people experience initial drowsiness when starting Fibroquel?

Official prescribing documents for Fibroquel do not list drowsiness as a commonly reported side effect. The adverse effects most commonly reported in official documents are reactions at the site of administration.

Q: Is Fibroquel a controlled substance?

Fibroquel is classified as a proteolytic enzyme and a debriding agent, based on its mechanism of action. According to government documentation, this medicine is not classified as a controlled substance that requires special scheduling.

Q: Can taking Fibroquel affect the results of lab tests?

Official prescribing information does not list a general warning about interference with routine diagnostic lab tests as a concern. While specific research studies have noted changes in certain inflammatory biomarkers in patients receiving the medicine, official prescribing information does not list general interference with routine diagnostic lab tests as a concern.

Q: Does Fibroquel have to be taken with food, based on official information?

Fibroquel is administered topically or by injection, not by mouth. Since this medicine is not an oral drug, official labeling does not contain instructions regarding administration with food, which is only relevant for oral medicines.

Q: Are there any lifestyle changes recommended when starting Fibroquel?

Official prescribing documents do not typically recommend broad changes to daily routines or habits. However, regulatory information does emphasize specific behavioral cautions, such as avoiding certain topical products, being aware of interactions with systemic medications, and following procedural restrictions on activity after injection.

Q: What is the difference between the generic and brand name versions of Fibroquel?

The active medicinal ingredient in Fibroquel is Collagenase. According to regulatory guidance, the generic product contains the identical active substance in the same concentration as the brand-name product. Differences usually relate to the inactive ingredients (excipients) and the name itself.

Q: Can Fibroquel be used if a patient has a history of mental health issues?

A history of mental health conditions is not listed as an official contraindication or as a specific precaution for the use of this medicine in prescribing documents.

Q: What kind of specialist usually prescribes Fibroquel?

The injectable form of the medicine must be administered by a qualified healthcare professional. Based on the approved uses, the drug is typically prescribed and administered by specialists such as those in wound care, urology, or orthopedics.

Q: Do official prescribing documents mention any specific ethnic differences in how Fibroquel works?

Official regulatory documents and clinical pharmacology summaries do not contain specific information regarding observed differences in the effectiveness or safety of the medicine based on ethnicity.

Q: What happens if Fibroquel is accidentally taken in a larger amount than prescribed?

Official prescribing information addresses the potential for an overdose of the enzyme. It states that no specific clinical reaction has been attributed to an overdose during the course of clinical trials.

Q: Is Fibroquel known to cause sun sensitivity?

Official documents detailing the safety profile and adverse reactions do not list sun sensitivity, or photosensitivity, as a known side effect of the medicine.

Q: Does Fibroquel require special monitoring from a doctor?

Special professional monitoring is required for the injectable form, particularly in patients who have pre-existing bleeding abnormalities or those who are taking anticoagulant medications. This precaution is stated due to the heightened risk of localized bleeding at the administration site when co-administered with certain drugs.

Q: What is the connection between Fibroquel and the immune system?

Fibroquel has been investigated in clinical studies for its potential immunomodulatory characteristics (how it may affect the immune system). Separately, official safety documents list immune system disorders, specifically hypersensitivity reactions and anaphylaxis, as potential adverse reactions.

Q: Are there any common foods or supplements that interact with Fibroquel?

Official regulatory documents primarily focus on interactions with specific systemic medicines, such as anticoagulants, and certain topical substances like heavy metal-containing agents. No specific interactions with common foods have been documented in official labeling.

Q: Do studies suggest Fibroquel is less effective over a long period of time?

The official research overview indicates that long-term effectiveness data are still under evaluation. Comprehensive data from large-scale randomized controlled trials for extended periods of continuous use are not yet fully established in the regulatory record.

Q: Are there any known interactions between Fibroquel and common over-the-counter pain relievers?

Official documentation requires caution when the injectable form is used alongside antiplatelet medicines, though low-dose aspirin is typically excluded from this constraint. Reviewing all medications, including over-the-counter pain relievers, with a healthcare professional is standard practice.

Q: Is Fibroquel used to treat a type of chronic pain?

While the medicine was initially studied in chronic inflammatory conditions like rheumatoid arthritis and osteoarthritis, its general purpose is defined in official documents as a proteolytic enzyme for enzymatic wound cleansing. The primary authorized function is related to the breakdown of tissue, rather than the direct management of chronic pain.

Q: What is the expected duration of Fibroquel's effects after one use?

For the injectable form, official guidelines mandate that specific procedural steps must be performed in the 24 to 72 hours immediately following administration. This period indicates the period of intensive, localized post-injection management described in the product label.

Q: Does Fibroquel have a risk of dependence or withdrawal?

According to official prescribing documents, there are no warnings regarding a risk of physical dependence or abuse associated with this medicine. Given its classification as a proteolytic enzyme with localized action, official documents do not list risks of dependence or withdrawal symptoms.

Q: Is there any public research available on how Fibroquel interacts with herbal supplements?

Official regulatory documents do not list specific known interactions with common herbal supplements. However, as a general precaution, patients are advised to inform their healthcare professional of all supplements, including herbal products, that they are currently using.

Q: What is the maximum period of time Fibroquel has been studied for continuous use?

The maximum period of time the medicine is studied for use depends on the specific approved condition being addressed. Official documents state that comprehensive long-term safety data for use over extended, continuous periods remains a subject for ongoing research.

Q: Does Fibroquel interact with common blood pressure medications?

Official prescribing documents do not list specific interactions with common classes of blood pressure medications. The primary interaction caution for the injectable form is specifically directed toward systemic anticoagulant and antiplatelet drugs due to the risk of localized bleeding.

Q: Are there specific official guidelines for discontinuing Fibroquel use?

For the topical ointment, the official guideline is to terminate use when the debridement (removal of damaged tissue) process is complete. The injectable form is administered using defined, cyclical schedules which specify when the administration period is completed.

How should Fibroquel be stored and disposed of?

How to Store and Dispose of Fibroquel?

The official storage and disposal requirements for Fibroquel, which contains Collagenase, are strictly defined by regulatory labeling to maintain the product's stability.


Storage Requirements

  • Unreconstituted Vials: The powder and diluent vials must be stored upright in a refrigerator at 2 C to 8 C (36 F to 46 F). The product must not be frozen.
  • Stability After Preparation: Once reconstituted, the solution must be used promptly. It can be stored for up to one hour at room temperature (20 C to 25 C) or up to four hours if refrigerated.
  • Child Safety: Like all medications, the product must be kept out of the sight and reach of children.

Disposal Instructions

  • Unused Product: Due to the single-use nature of the vials, any unused portion of the reconstituted solution and diluent remaining after administration must be discarded.
  • Sharps Disposal: Used needles and syringes must be placed immediately in an FDA-cleared sharps disposal container and should not be thrown into household trash or recycling.

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

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