Lysozyme

Quick links to important sections

Lysozyme

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 Lysozyme

What is Lysozyme?

Lysozyme is a naturally occurring enzyme found in various body fluids and tissues, including tears, saliva, milk, and mucus. It plays a fundamental role in the body's innate immune system by acting as a biological barrier against certain types of microorganisms.

Mechanism of Action

The primary function of lysozyme is its ability to break down the cell walls of specific bacteria. It works by targeting peptidoglycan, a structural component that provides rigidity to the bacterial cell wall. By catalyzing the hydrolysis of the bonds within this layer, the enzyme compromises the integrity of the cell, leading to the eventual collapse and destruction of the bacterium.

Biological Significance

In the human body, lysozyme serves as a first line of defense. Because it is present on mucosal surfaces and in secretions, it helps maintain a balance of microflora and protects sensitive areas, such as the eyes and respiratory tract, from environmental pathogens.

Beyond its natural presence in the human body, lysozyme is also found in high concentrations in egg whites, which has historically made it a subject of significant biochemical research. In a clinical or therapeutic context, it is often classified as an antiseptic or an anti-inflammatory enzyme, utilized for its ability to support the body's natural recovery processes without the use of synthetic chemicals.

What side effects are possible with Lysozyme?

Possible Side Effects and Safety Information

The safety profile of Lysozyme, particularly when derived from hen's egg white, is primarily characterized by its allergenic potential and risk of respiratory sensitization.

Adverse Reactions and Classification

Adverse effects are officially grouped by System-Organ Class (SOC), with the most significant categories being Immune System Disorders and Respiratory, Thoracic and Mediastinal Disorders. The key known adverse reactions include:

  • Allergic Reactions: Symptoms such as urticaria (hives), skin rash, and swelling.
  • Respiratory Symptoms: Including asthma, cough, and dyspnoea (difficulty breathing), particularly if the powder form is inhaled.

Serious Reactions and Safety Constraints

Although rare, severe allergic reactions (including the potential for anaphylaxis) are officially acknowledged risks due to the egg protein component. Toxic Epidermal Necrolysis (TEN)-type drug eruption has also been documented as a rare, serious adverse reaction.

Population-Specific Restrictions:

Use of Lysozyme is officially contraindicated for individuals with a known allergy to egg protein. Regulatory warnings emphasize the need for caution and avoidance in this population. For certain products, specific restrictions may also apply to pregnant women, lactating women, and individuals with chronic kidney disease in various regulatory jurisdictions.

Inhalation Warning:

The product is classified as a Respiratory Sensitizer in chemical hazard systems. Safety data mandates that individuals handling the powder form must avoid breathing the dust and use appropriate respiratory protection to mitigate the risk of sensitization and asthmatic symptoms.

Overdose and Emergency Response

Overdose and when to seek help

The official regulatory profile for Lysozyme, primarily found in documentation for oral formulations, emphasizes the required emergency response rather than specific acute toxic effects, which are generally not documented for the enzyme itself.

Overdose Manifestations and Effects

Domain Official Regulatory Statement
Documented Manifestations: Peripheral neuropathy and associated signs, including pins and needles, tremor, and muscular weakness, are documented when Lysozyme products co-formulated with Pyridoxine are administered in high doses over prolonged periods.
Exposure Factors: These specific neurological effects are linked to the chronic, prolonged exposure to the Pyridoxine component within the combination formulation.
Acute Outcomes: No acute, severe, or life-threatening manifestations are specifically documented in regulatory overdose sections for Lysozyme alone.

When to Seek Urgent Medical Help

The official instruction for any suspected overdose mandates immediate professional consultation.

Domain Official Regulatory Statement
Emergency Response: Contact a doctor or pharmacist straight away in the event of taking a larger amount of medicine than should be used.
Medical Aid: This immediate consultation is required so that healthcare personnel can administer medical aid appropriate to the patient’s condition.

Management for the documented chronic neurological effects is primarily the discontinuation of the medication. No specific antidote is documented in the available regulatory information. The overall overdose structure adheres to the standardized classification used in government-authorized prescribing guidelines.

Therapeutic Uses of Lysozyme

What Lysozyme Treats: Main Uses and Benefits

Lysozyme is commonly used to help with symptomatic relief for inflammatory and irritative states affecting the mouth and throat. Its primary therapeutic goal is to address symptoms that interfere with daily functioning and may help patients cope more steadily with difficult episodes. It is commonly applied in scenarios where short-term symptomatic assistance is needed for conditions presenting with acute or disruptive symptom patterns.

The application of lysozyme is relevant across therapeutic areas that involve localized inflammation.

The medication is commonly used to help with symptoms associated with conditions such as acute pharyngitis, tonsillopharyngitis, laryngitis, and localized oral irritations including stomatitis, gingivitis, and minor oral ulcers. It helps address symptom clusters that may become intense or disruptive, targeting manifestations like sore throat and painful swallowing (dysphagia).

Supportive Benefit

Lysozyme is also applied in specific contexts, such as providing supportive relief for postoperative discomfort and managing intense mucosal inflammation like oral mucositis. It is used for managing symptoms that interfere with daily comfort, and assists with maintaining functional stability when eating or speaking.


Quick Fact Block

Quick Fact: Relief for Clinical Context Patient Benefit
Sore Throat & Dysphagia Acute Tonsillopharyngitis Supports general well-being during symptomatic phases
Mucosal Irritation Stomatitis & Oral Ulcers Helps improve day-to-day comfort
Post-Procedural Discomfort Postoperative Care Assists with maintaining functional stability

Eligibility and Restrictions for Use

Who Can and Cannot Use Lysozyme: Official Regulatory Information

The eligibility to use Lysozyme is strictly defined by regulatory documents, focusing on patient hypersensitivity and age. The most critical restriction is the absolute contraindication for individuals with a known allergy to hen's eggs or to the active substance, Lysozyme chloride. This is due to the enzyme's extraction source from egg white.

Eligibility Status Summary

Status Population/Condition
Contraindicated Known Hypersensitivity to Lysozyme Chloride
Contraindicated Known Allergy to Eggs
Contraindicated Children below the labeled minimum age (e.g., typically under 6 years for oral forms)
Not Recommended Pregnancy and Lactation (Use requires caution due to limited data)
Use with Caution Older Adults (Geriatric Population)

Standard labeled use is approved for the adult population and children above the specific minimum age threshold. Use during pregnancy and lactation is generally not recommended or advised against, reflecting regulatory caution due to a lack of fully established safety data. Patients with a known intolerance to specific formulation excipients may also be restricted from use.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Official regulatory documents define the interaction profile of Lysozyme based on the absence of conventional drug-drug interactions, with one specific substance-related restriction.

Interaction Scope

Scope Element Officially Documented Information
Medicinal product categories with documented interactions None documented in official labels.
Specific interacting medicines (if explicitly listed) None explicitly listed in official government labels.
Mechanistic basis of interactions Not applicable; no pharmacokinetic or pharmacodynamic mechanisms are documented as clinically significant interactions.
Timing-based interaction rules No mandatory timing separation rules are specified in government regulatory text.
Population-specific interaction notes Individuals with known allergy or hypersensitivity to hen's egg.
Interaction-related restrictions Caution is advised for products derived from hen's egg white due to the potential for allergic reactions in susceptible individuals.

Official Interaction Statements

The enzyme Lysozyme is typically derived from hen's egg white, and this origin necessitates regulatory caution regarding its use in individuals with known egg allergy or hypersensitivity. Government regulatory authorities advise that Lysozyme-containing products derived from egg white have the potential to cause allergic reactions in this susceptible population. No formal drug-drug interactions, whether pharmacokinetic (CYP, transporter-mediated) or pharmacodynamic, are explicitly documented in major government regulatory labels.


Connection to the Overall Interaction Profile

The official documents define the product's interaction structure primarily by the absence of documented drug-drug interactions, confirming no explicit restrictions based on metabolic pathways or additive effects. The single, formally documented constraint is a substance-specific restriction where the enzyme's source triggers a mandatory regulatory caution regarding use in the population with hen's egg hypersensitivity.

Mechanism of Action

Enzymatic Degradation of Bacterial Cell Walls

Lysozyme functions as an intrinsic, highly specific enzyme (beta-1,4-N-acetylmuramidase) that acts on the bacterial cell wall polymer, peptidoglycan. Its interaction type is catalytic hydrolysis, involving the cleavage of the key beta(1 ightarrow4) glycosidic bonds between N-acetylmuramic acid (NAM) and N-acetylglucosamine (NAG) residues. This molecular action directly compromises the structural rigidity of the cell wall.


Osmotic Lysis Cascade and Local Defense

The cell wall degradation initiates an osmotic lysis cascade: the weakened bacterial structure fails to counteract the cell's high internal osmotic pressure, leading to rapid cellular swelling and rupture (bacteriolysis). This mechanism constitutes a direct bactericidal effect and results in a reduction in viable microbial load. Lysozyme acts as an effector molecule within the innate immune system, contributing to local antimicrobial defense and the function of the biological barrier on mucosal surfaces.

Dosage and Administration Information

How to Use Lysozyme: Official Administration Guidelines

Lysozyme is available in multiple forms, including oral tablets, granules, and oromucosal lozenges (often combined with other agents). Its prescribed use is structured around the form and the required route of administration.


Administration Scope

Feature Official Instruction Summary
Route of administration Oral (for systemic tablets/granules) and Oromucosal (for lozenges).
Standard Dosing Regimens Systemic Oral Use (Adults): Typically 60–270 mg (potency) daily of lysozyme hydrochloride. Local Use (Adults): 3 to 6 lozenges to be taken daily.
Frequency and Timing The systemic daily dose is generally divided into three doses. Local lozenges are distributed regularly throughout the day, often with a minimum delay of two hours between each intake.
Special Procedural Conditions Lozenge forms are intended to be held and dissolved slowly in the mouth; they must not be crushed, broken, or chewed. Tablets meant for swallowing should be taken with a full glass of water.
Age-Group Administration The use of oromucosal forms is typically reserved for adults and children over 6 years of age. For tablets and systemic forms, caution is advised in older adults.
Course Duration Use is generally for a short-term period. Prolonged use of local forms is often advised against as it may disrupt local microbial balance.

Connection to the Overall Use Protocol

These official instructions define a clear procedural structure where the correct administration route is linked to the specific dosage form—either swallowed whole for systemic effect or dissolved locally for the oromucosal area. The established divided frequency and milligram strength determine the required daily intake, while procedural rules ensure the product is administered as intended.

Recent Clinical Evidence

Research Evidence: Overview of Studies for Lysozyme

This overview describes the types of scientific research conducted on Lysozyme, focusing on the evidence structure, the outcomes studied, and the limits of the current data, without offering medical advice or treatment instructions.


Evidence for Use in Acute Oral and Oropharyngeal Inflammation

Research explored Lysozyme in the context of symptoms associated with conditions such as acute tonsillopharyngitis and the discomfort of a common sore throat. Research in this area was evaluated in Randomized Controlled Trials (RCTs) and various comparative studies, which are relevant in trials assessing short-term or episodic symptom patterns. Investigators primarily monitored patient-reported outcomes related to physical discomfort, such as how pain intensity was measured and the severity of difficulty in swallowing (dysphagia).

A key limitation is that many findings were associated with a fixed-dose combination preparation with another active ingredient, making it challenging for the research to clarify the singular contribution of Lysozyme. Furthermore, the follow-up durations were limited, focusing only on the acute phase of the illness, meaning limited information exists regarding long-term outcomes or recurrence patterns.


Evidence for Localized Oral Mucosal Damage

Studies explored Lysozyme in contexts focused on specific forms of tissue damage, particularly radiotherapy-induced oral mucositis and recurrent aphthous stomatitis (mouth ulcers). This research frequently uses double-blind, placebo-controlled trials. Researchers examined how the healing rate or changes in the size of oral ulcers/lesions were monitored, and tracking patient-reported outcomes describing perceived discomfort related to eating.


Key Studies & References

  1. Lysozyme-based spray for treatment of radiotherapy-induced oral mucositis
  2. Prevention and Treatment of Oral Mucositis in Pediatric Patients: Systematic Review and Meta-Analysis of Randomized Controlled Trials
  3. Lysozyme – An Underexploited Molecule with High Therapeutic Potential but of Little Interest to the Pharmaceutical Industry

Frequently Asked Questions (FAQ)

Common questions about Lysozyme (FAQ)


Q: Can Lysozyme be used for any kind of cold or sore throat?

According to official regulatory documents, Lysozyme's general use is described for the relief of discomfort associated with localized inflammatory conditions in the oral cavity and upper respiratory tract. This scope includes symptomatic relief for sore throat. The product's official application is focused on these specific local inflammatory conditions.


Q: What are the most common side effects described for Lysozyme?

Official product information notes that allergic reactions and respiratory symptoms are documented adverse effects. Other common reports submitted to regulatory systems often mention gastrointestinal discomfort, which may include feeling sick (nausea or vomiting) or diarrhea. The complete safety profile is contained within the full package leaflet.


Q: Is Lysozyme used outside of treating throat symptoms?

Yes, official research has explored Lysozyme's use in other specific localized oral mucosal damage contexts. These include studies involving radiotherapy-induced oral mucositis and recurrent aphthous stomatitis, commonly known as mouth ulcers. This indicates that research extends beyond typical sore throat relief.


Q: Does official evidence support Lysozyme's benefits?

Official documents describe research that has examined patient-reported outcomes related to the use of Lysozyme. These studies specifically monitored physical discomfort and the severity of difficulty in swallowing in patients. The evidence structure focuses on these measurable outcomes in relevant patient populations.


Q: Can Lysozyme be taken at the same time as pain relievers?

Official regulatory documents state that there is an absence of documented formal drug-drug interactions with other medicinal products. The interaction profile is generally defined by this absence of formal restrictions, meaning no mandatory separation rules are specified in government regulatory text.


Q: Why is Lysozyme sometimes combined with other active ingredients?

Lysozyme is available in combination preparations designed to offer enhanced supportive function. The combination with other active substances creates specialized products intended to address localized conditions more broadly and provide a comprehensive effect.


Q: Can Lysozyme affect my blood pressure?

This is not a commonly listed side effect, but some rare reports have mentioned that prolonged use of Lysozyme may lead to changes in blood pressure or heart rate. This type of information is noted in regulatory data as a precaution in certain contexts.


Q: Is Lysozyme broken down by the stomach acid?

Research focusing on the enzyme's behavior indicates that Lysozyme derived from hen egg white may exhibit partial resistance to breakdown. This suggests that the enzyme is not fully destroyed during the initial digestion process in the gastrointestinal tract.


Q: Does Lysozyme cause stomach upset or nausea?

Yes, gastrointestinal discomfort is one of the commonly reported side effects noted in safety reporting systems. This discomfort can include symptoms such as nausea, vomiting, or diarrhea.


Q: Can Lysozyme interact with herbal supplements?

While official regulatory documents do not explicitly list interactions with specific herbal supplements, they generally state that formal drug-drug interactions are absent from the major regulatory labels. This information presents the current scope of the interaction profile documented by major regulatory labels.


Q: What are the official sources for information about Lysozyme?

Authoritative drug information for Lysozyme can be found in documents published by major national drug agencies. These sources include regulatory bodies like the U.S. FDA, the European Medicines Agency (EMA), Health Canada, Australia's TGA, and the U.S. National Institutes of Health (NIH).


Q: Is Lysozyme approved by the FDA or EMA?

Lysozyme is classified as a widely recognized medicinal ingredient under the World Health Organization's Anatomical Therapeutic Chemical (ATC) system. It is regulated and approved for use as a medicinal ingredient by various national agencies globally, including those in North America, Europe, and Asia.

How should Lysozyme be stored and disposed of?

How to Store and Dispose of Lysozyme Chloride

The storage of lysozyme chloride is determined by regulatory standards to preserve its stability and quality. The product must be stored below 25°C (77°F) and kept protected from light. To maintain these conditions, the product should remain in the original container.

Storage Requirements

Condition Requirement
Temperature Store below 25°C (77°F)
Environment Protect from light
Packaging Keep in original container

Handling and Disposal

For safety, the medication must be stored out of the sight and reach of children.

Disposal of any unused or expired lysozyme product or associated waste material should be performed strictly in accordance with local requirements and regulations.

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

Equivalent of Lysozyme found in:

A-Z Index: