Tyrozets

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Tyrozets

Method of action: Local Anesthetic

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 Tyrozets

Quick Facts

Property Description
Active Ingredients Benzocaine, Tyrothricin
Form Throat Lozenge
Pharmacological Class Topical Anti-infective and Local Anaesthetic Combination
General Purpose Localized relief from minor sore throat and mouth pain
Origin Synthetic (Benzocaine) and Derived Polypeptide (Tyrothricin)

What Type of Medicine is Tyrozets?

Tyrozets is defined as a fixed combination pharmaceutical product classified as a Topical Anti-infective and Local Anaesthetic Combination. It is administered as a throat lozenge, allowing for oral, topical administration that concentrates the active components directly on the mucosal surfaces of the mouth and pharynx. This structure facilitates its distinct dual-action strategy, which is clinically recognized for providing both immediate symptomatic pain relief and localized anti-infective activity. This differentiates it from single-agent lozenges by integrating two complementary therapeutic functions into one medicinal form.

Composition and Origin: Benzocaine and Tyrothricin

The composition of Tyrozets is based upon its two active ingredients: Benzocaine and Tyrothricin. Benzocaine is a synthetically produced local anaesthetic that provides a rapid, surface-level numbing action. The second component, Tyrothricin, is a polypeptide antibiotic complex derived from the bacterium Brevibacillus parabrevis. This specific pairing of a widely recognized surface anaesthetic with an antibiotic often reserved for topical use is a unique feature of the formulation. The efficacy of Tyrothricin is supported by pharmacological studies confirming its ability to act locally on susceptible microorganisms.

General Purpose and Core Benefit

The overarching general therapeutic purpose of Tyrozets is to deliver prompt, localized symptomatic relief for the pain associated with minor irritations of the mouth and throat. The medicine’s core benefit is derived from its coordinated effect: the anaesthetic component quickly addresses the sensation of soreness, while the antibiotic exerts a localized action against susceptible bacteria that may be present. The product is intended to both soothe the pain and address the microbial aspect of the local irritation, offering a comprehensive, non-systemic approach to mild oral discomfort.

What side effects are possible with Tyrozets?

Possible Side Effects and Safety Information

Tyrozets' safety profile is officially characterized by the localized effects of the active ingredients, Benzocaine and Tyrothricin, and specific systemic risks documented in regulatory sources.

Documented Adverse Reactions

Adverse reactions are officially grouped into System-Organ Classes (SOC) found in the product's regulatory labeling. Effects are primarily related to the mouth and skin:

  • Gastrointestinal Disorders: Documented changes include soreness or a black discoloration of the tongue. These effects are typically reversible upon stopping the medicine.
  • Skin and Subcutaneous Tissue Disorders: The potential for skin rashes has been reported following the administration of Benzocaine, indicating a possibility for hypersensitivity reactions.

Serious and Population-Specific Safety

The most clinically significant adverse reaction documented is Methaemoglobinaemia, a serious blood disorder associated with the use of Benzocaine, which is classified as rare in infants and children.

Regulatory documents explicitly identify populations at increased risk for this reaction:

  • Pediatric Patients: Children aged two or younger are noted as being the most susceptible.
  • Older Adults: The elderly population is also identified as being at increased risk.
  • Specific Conditions: Patients with certain inborn errors of metabolism or pre-existing breathing problems face a greater risk of complications related to this reaction.

Safety Constraints and Restrictions

Regulatory documentation outlines clear limitations for use. The medicine is strictly contraindicated in individuals with a known hypersensitivity to Tyrothricin, Benzocaine, or any excipients.

Furthermore, a key safety constraint related to the antibiotic component is the risk of superinfection—the over-growth of non-susceptible organisms. The label specifies that treatment should be stopped if new infections appear. Use is also restricted for patients with rare hereditary problems of fructose intolerance or specific malabsorption conditions due to the presence of sucrose in the lozenge.

Overdose and Emergency Response

Overdose or excessive exposure to the Benzocaine component of this medicine carries the rare, but serious and potentially life-threatening risk of developing Methemoglobinemia. This condition affects the hematological system, resulting in a marked reduction in the blood's oxygen-carrying capacity.

When to Seek Immediate Medical Help

Immediate medical attention and cessation of use are explicitly required by regulatory authorities upon the appearance of specific clinical manifestations:

  • Pale, gray, or blue colored skin, lips, and nail beds (cyanosis)
  • Shortness of breath or difficulty breathing
  • Headache, confusion, or dizziness
  • Rapid heart rate (tachycardia)

If these signs are observed, individuals must contact a Poison Control Center or emergency services right away.

Overdose Management and Risk Factors

In a professional setting, treatment is stated to be symptomatic and supportive. Regulatory documents note that no specific antidote is known to be available for the active drug substances, though specialized agents are used for managing the complication itself. Official prescribing information identifies specific populations at a higher risk for this adverse outcome:

  • Children aged two or younger (contraindicated)
  • The elderly
  • Patients with breathing problems (e.g., asthma)
  • Patients with heart disease

Therapeutic Uses of Tyrozets

What Tyrozets Treats: Main Uses and Benefits

Tyrozets is commonly used to provide local symptomatic relief and anti-infective support for conditions involving minor mouth and throat irritations. The therapeutic intent of the formulation is centered on minor throat and mouth irritations.

Symptom Domains and Patient Benefit

This lozenge is commonly used to help manage symptoms related to physical discomfort, primarily addressing the sensation of pain, soreness, and irritation concentrated in the throat and mouth, as well as the functional discomfort of painful swallowing. The benefit provided is topical anaesthetic relief that contributes to easing the overall symptom load and helps maintain a sense of stability when symptoms interfere with daily functioning.

The medicine is commonly used in clinical settings that involve acute or episodic symptom patterns, specifically for minor irritations associated with common symptomatic episodes like acute pharyngitis. The dual therapeutic advantage—combining rapid pain relief with a localized anti-infective component—may assist in addressing the microbial aspect of the local irritation. This combination supports the easing of the overall symptom load and general well-being during symptomatic phases. The primary areas of use include the localized relief of symptoms related to sore throat, throat irritation, and sore mouth.


Quick Fact Block

Property Description
Quick Fact: Relief for Localized Pain
Symptom Axis Symptoms related to physical discomfort, functional strain
Core Benefit Targeted symptomatic relief; assists with maintaining functional stability
Severity Use Minor irritations; commonly used for mild to moderate pain

Regulatory References

  1. HPRA Summary of Product Characteristics

Eligibility and Restrictions for Use

The population eligibility for Tyrozets (Benzocaine/Tyrothricin) is strictly defined by regulatory documents, establishing clear limitations and absolute contraindications.

Populations for Whom Use is Contraindicated

Use is officially forbidden in patients with known hypersensitivity to the active ingredients or any excipient. It is also contraindicated in children less than 3 years of age. Furthermore, the medicine must not be used by individuals with rare hereditary problems of fructose intolerance, glucose-galactose malabsorption, or sucrose-isomaltase insufficiency due to the lozenge's content.

Age-Related Eligibility Rules

Age Group Regulatory Status
Children < 3 years old Contraindicated
Children 3 to 11 years old Restricted Use
Adults and Children ≥ 12 years old Allowed

Condition-Specific Eligibility Rules

Use requires special caution in groups at documented risk for complications, including the elderly, smokers, and patients with pre-existing breathing problems (e.g., asthma) or heart disease. Conditional use also applies to patients with certain inborn errors of metabolism. Patients with diabetes mellitus must consider the sucrose content.

Pregnancy and Lactation Eligibility Status

Use is generally not recommended during pregnancy or breastfeeding unless the potential benefit to the mother outweighs the possible risk to the child, requiring professional guidance.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Official regulatory documents define the interaction profile of Tyrozets lozenges primarily by the absence of documented drug–drug interactions. Authoritative prescribing information reports that there are no known interactions with other medicinal products. Consequently, no specific pharmaceutical agents or drug classes are listed as being contraindicated or requiring dose adjustments due to metabolic or pharmacodynamic interactions.


Administration Constraints and Non-Drug Interactions

The most significant documented constraints relate to administration timing and excipient content, rather than systemic drug interactions.

Timing-Based Administration Restriction:

Substance Constraint Rationale
Food and Drink Must be avoided directly after administration of the lozenge. This restriction is formally documented to prevent physical trauma to the mucous membranes due to the numbing effect of the Benzocaine component.

Excipient-Related Restriction:

The medicine is formally restricted for use in patients with rare hereditary problems of fructose intolerance, glucose-galactose malabsorption, or sucrose-isomaltase insufficiency. This is due to the presence of sucrose in the lozenge formulation.

Mechanism of Action

Peripheral Blockade of Pain Signaling

The anaesthetic component, Benzocaine, exerts its action by physically blocking voltage-gated sodium channels on peripheral sensory nerve endings. This mechanism prevents the influx of sodium ions required to generate and transmit an electrical impulse . The resulting physiological consequence is the inhibition of electrical impulse conduction in nociceptive neurons, which modulates afferent sensory signal transmission at the application site.


Disruption of Bacterial Cell Integrity

The component Tyrothricin, a mixture of polypeptides, acts directly on the phospholipid bilayer of susceptible microbial cell membranes. Its mechanism involves inserting itself into the membrane, which compromises the structural integrity and stability of the cell. This physical disruption leads to the loss of essential ions and cell contents, resulting in localized bactericidal activity on the mucosal surface.


Complementary Dual Pharmacodynamic Strategy

Tyrozets utilizes a dual-mechanism approach that influences two distinct biological domains simultaneously. The Benzocaine mechanism interrupts peripheral neural signaling, while the Tyrothricin mechanism initiates a compromise of microbial cell structure. This fixed-combination strategy results in a coordinated effect influencing both peripheral neural transduction and localized microbial viability.

Dosage and Administration Information

Instruction Map: How to use Tyrozets — Administration Guidelines

Administration Scope

Property Instruction
Route of administration: Oral, topical administration for local effect on the mucosal surfaces of the mouth and pharynx.
Dosing schedule (Adults 12): One lozenge per dose, not to exceed 8 lozenges in a 24-hour period.
Preparation requirements: The lozenge must be allowed to dissolve slowly in the mouth; it must not be chewed or swallowed whole.
Age-group administration rules: Children 3 to 11 years have a maximum of 6 lozenges per 24 hours. Use is prohibited in children less than 3 years of age.
Special procedural conditions: Treatment is limited to a maximum of five consecutive days. Use requires re-evaluation if an adequate response is not evident within two days. The lozenge contains sucrose, which is a consideration for patients with diabetes mellitus.

Instruction Classifications (High-level)

Property Classification
Administration method type: Topical (oral mucosal)
Frequency pattern: Intermittent (every three hours)
Use-context constraints: Duration-limited (5 days maximum) and symptom-contingent (review after 2 days).

Resulting Procedural Structure

The standard administration involves dissolving one lozenge every three hours. The established protocol involves strict limits for use, including a maximum daily intake and a defined five-day maximum duration for the treatment course. This structure mandates adherence to age-specific maximums and involves the discontinuation of use if symptom relief is not demonstrated within 48 hours. The lozenge must be slowly dissolved to achieve maximum contact with local tissues.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Tyrozets

Evidence for Localized Relief of Minor Mouth and Throat Irritations

Research examining Tyrozets lozenges has been relevant in trials assessing short-term or episodic symptom patterns, particularly for minor irritations of the mouth and throat. The primary research exploring the lozenge consists of short-term, randomized controlled trials (RCTs). These studies were applied in research contexts involving fluctuating or unstable symptoms, with the aim of exploring how symptoms change over time in the observed populations.

The clinical research primarily explored outcomes related to physical discomfort, specifically using patient-reported outcomes describing perceived discomfort linked to the acute onset of a sore throat. Findings describe patterns observed in the studies related to measurements of short-term pain intensity. The research highlights changes measured during the study period, and provides context for how patients reported their experience during the initial hours and days of a sore throat episode.

Evidence for Use in Secondary Irritation Following Minor Mouth or Throat Procedures

The research context for this medicine in conditions associated with acute or disruptive episodes, such as irritation following minor mouth or throat procedures, is primarily derived from established clinical experience and data reviewed by regulatory bodies. The formulation was evaluated in research scenarios examining outcomes related to physical discomfort present during recovery.

A key research limitation is the lack of dedicated, randomized controlled trials specifically testing the lozenge combination in the post-operative setting in the public domain. Data for certain groups remain insufficient, and research provides limited insight into the medicine's potential influence on the overall functional recovery timeline.

What Research Gaps and Uncertainties Remain

Long-term effects are not fully established, as studies have not been designed to examine outcomes over extended periods beyond the acute treatment window. A key limitation is the documented reliance in some regulatory reviews on evidence derived from studies involving lozenges that featured a different, three-active-ingredient formulation, making the precise contribution of the Tyrozets dual-active combination uncertain.

Another area of uncertainty revolves around the anti-infective component, Tyrothricin. Given that many throat irritations are viral, the clinical relevance of the localized antibiotic was observed in some studies, but its overall contribution to patient-reported outcomes is a persistent question noted in evidence assessments.

Key Studies & References

  1. Tyrozets Lozenge - Summary of Product Characteristics (SPC) [PA0330/043/001]
  2. Antibiotic lozenges for sore throat: An overview of regulatory and clinical evidence (Inferred Regulatory Assessment Source)

Frequently Asked Questions (FAQ)

Common questions about Tyrozets (FAQ)

Q: What does benzocaine do, and is it common in throat lozenges?

Benzocaine is the local anesthetic component, and its role is to block pain signals, which provides a numbing effect at the site of application. Official product information for numerous over-the-counter products indicates that benzocaine is a frequently used active ingredient in various throat lozenges and sprays.

Q: Can Tyrozets be taken with other non-prescription pain relievers like paracetamol or ibuprofen?

According to the official product information, Tyrozets lozenges have no known drug-to-drug interactions reported with other medicinal products. It is important to review the official product information for any medicine being taken to ensure comprehensive safety details.

Q: Can Tyrozets be taken with other types of antibiotics?

Regulatory documents state that there are no known interactions with other medicinal products. However, the antibiotic component in Tyrozets is for topical local effect and is not intended to replace a systemic (oral or injectable) antibiotic prescribed by a healthcare professional.

Q: Can I use Tyrozets for a sore throat caused by a viral infection?

The product is officially indicated only for the relief of minor mouth and throat irritations. Regulatory bodies have noted that the majority of sore throats are caused by viral infections, which means the antibiotic component is not intended to treat the underlying viral cause.

Q: Is Tyrozets intended to replace systemic antibiotics prescribed by a doctor for a bacterial infection?

No, official patient information clarifies that Tyrozets is not intended to replace other antibiotic medicines prescribed by your doctor. It is described as providing a local action against susceptible bacteria in the mouth and throat.

Q: What are the concerns regarding the antibiotic component (tyrothricin) and antibiotic resistance?

Regulatory authorities have expressed concerns that the use of antibiotics in over-the-counter lozenges, which are often used for viral infections, may contribute to the global concern of antibiotic resistance. This regulatory context informs why the medicine is limited in its availability.

Q: Are Tyrozets lozenges still available for purchase in all countries?

No, the availability of Tyrozets lozenges is now restricted due to regulatory changes in certain jurisdictions. For example, regulatory action resulted in the product being discontinued and no longer available for purchase in the UK.

Q: Why do some sources indicate that Tyrozets has been discontinued?

Regulatory decisions in some regions were based on concerns regarding the antibiotic component. Authorities determined that the majority of sore throats are viral and that the use of the antibiotic in the lozenge could potentially contribute to antibiotic resistance.

Q: What is the main difference between Tyrozets and other popular throat lozenge brands like Strepsils or Difflam?

Tyrozets is classified as a Topical Anti-infective and Local Anaesthetic Combination. Its unique dual action is described as involving both the anesthetic Benzocaine to numb pain and the antibiotic Tyrothricin for localized anti-infective action.

Q: What is the purpose of the non-active ingredients (excipients) in Tyrozets?

The non-active ingredients, or excipients, are necessary components added to the medicine's formulation. Their functions include supporting the product's stability, ensuring the tablet holds its shape, and improving its overall taste and appearance.

Q: Do Tyrozets come in different flavors?

Yes, the official lozenge formulation includes flavouring agents as part of its non-active ingredients. These are added to make the medicine more palatable for patients.

Q: Does Tyrozets help with symptoms of a common cold or flu, besides the sore throat?

Official product information indicates that the lozenge is for the relief of minor mouth and throat irritations only. It is not indicated for treating general symptoms associated with a common cold or flu, such as fever or nasal congestion.

Q: What should be done if someone accidentally takes too many Tyrozets lozenges?

The official instruction in the patient leaflet is to immediately contact a doctor or the nearest Accident and Emergency department (Casualty). Official instruction is to take the product information leaflet along to assist healthcare professionals.

Q: If Tyrozets is discontinued, what is the regulatory reason for its removal from the market?

In regions like the UK, the regulatory body made a decision based on the prevalence of viral sore throats and the risk of antibiotic resistance. They concluded that the antibiotic component was often unnecessary from a public health perspective.

How should Tyrozets be stored and disposed of?

Tyrozets lozenges must be stored according to official regulations to maintain product stability and integrity, which is typically three years when stored correctly.

Official Storage and Disposal Requirements

Requirement Type Specification
Temperature Store below 25 C (Do not store above 25 C)
Protection Store in the original package to protect from light and moisture.
Child Safety Keep out of the sight and reach of children (a mandatory requirement).
Disposal Dispose of unused or expired product in accordance with local requirements.

These constraints ensure the active ingredients, Benzocaine and Tyrothricin, remain stable until the product's expiry date. No special handling is required beyond following local guidelines for pharmaceutical waste disposal.

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

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