InfectoMyk

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InfectoMyk

Medically reviewed

Marina Burgos

Last updated on 22/12/2025

This page provides general, reference-level information compiled from official medical sources. It is not a substitute for professional medical advice, diagnosis, or treatment. For decisions about your health, please consult a qualified healthcare professional.

Overview of InfectoMyk

Quick Facts

Property Description
Active Ingredient Natamycin (INN)
Form Sterile Ophthalmic Suspension
Pharmacological Class Polyene Macrolide Antibiotic / Antifungal Agent
General Purpose To eliminate fungal pathogens on the ocular surface
Origin Natural (derived from Streptomyces natalensis)
Rx Status Prescription-only

What is InfectoMyk and Its Pharmacological Classification?

InfectoMyk is a specialized, prescription-only anti-infective medicine that primarily functions as a polyene macrolide antibiotic and a targeted antifungal agent. The drug’s core purpose is to fight specific fungal pathogens. Its pharmacological identity is defined by its active chemical substance, Natamycin (INN), which dictates its selective action against various fungi.

This classification confirms the drug is intended for infections caused by fungi, distinguishing it from conventional antibiotic or antiviral treatments. Natamycin is recognized for its established efficacy as a therapeutic option for specific ocular fungal infections. This indicates the agent is a reliable choice for targeting this type of pathogen, clinically recognized for its utility in treating external fungal infections of the eye.


Composition and Origin: Is Natamycin Natural or Synthetic?

InfectoMyk is delivered as a sterile ophthalmic suspension, meaning it is a liquid preparation containing fine particles of the drug intended for application to the eye. The active substance, Natamycin, is naturally derived through a fermentation process involving the bacterium Streptomyces natalensis.

As a preparation for topical ophthalmic administration, the suspension form is a key factor, ensuring the therapeutic compound is applied directly to the infected area of the eye. This vehicle is specifically chosen to optimize the drug's contact time on the ocular surface, enabling the Natamycin to exert its effects locally without significant systemic absorption.


How Does InfectoMyk Target Fungal Infections?

InfectoMyk’s active ingredient, Natamycin, works through a definitive fungicidal action, meaning it directly destroys susceptible fungal cells rather than merely inhibiting their growth. This selective process is achieved because Natamycin is chemically attracted to ergosterol, a sterol that is critical for maintaining the structure of the fungal cell membrane, which is not present in human cells.

By targeting and disrupting this unique fungal component, Natamycin causes irreparable damage to the pathogen’s protective membrane. Natamycin exhibits high selectivity against fungi, functioning as a targeted agent. This selectivity confirms the drug’s specialized effectiveness against the fungal pathogen, serving the primary purpose of eradicating the source of the infection and limiting its progression.

Regulatory References

  1. EMA Official Website
  2. European Public Assessment Reports (EPAR)

What side effects are possible with InfectoMyk?

Possible Side Effects and Safety Information

The official safety profile of InfectoMyk (Natamycin ophthalmic suspension) primarily reflects adverse reactions at the site of administration, alongside documentation of rare, potentially systemic, serious events. This information is derived exclusively from regulatory documents and authoritative government sources.


Adverse Reaction Scope

Category Description
Key Adverse Reactions Localized ocular effects (most common) and rare, potentially systemic, hypersensitivity reactions.
Frequency Classification Common reactions (occurring in 1% or more of patients) include eye irritation, increased tearing (lacrimation), and a foreign body sensation in the eye.
System-Organ Classes Adverse events are documented across Eye disorders (most frequent), Immune System disorders (allergic reaction), Respiratory disorders (dyspnea), and Cardiac disorders (chest pain).
Serious Adverse Reactions Regulatory documents list severe allergic reaction (hypersensitivity) symptoms, such as swelling of the face or difficulty breathing, as serious events, along with severe eye pain and reported instances of chest pain.

Population-Specific Safety Constraints

The prescribing information includes specific safety constraints for certain patient groups:

  • Pediatric Use: Safety and effectiveness have not been established in pediatric patients.
  • Pregnancy: Classified as Pregnancy Category C; use is only permitted if the potential benefit justifies the potential risk, as determined by a healthcare provider.
  • Nursing Mothers: Caution is required since it is not known whether the active ingredient is excreted in human milk.

Safety Restrictions and Regulatory Context

The medicine is strictly contraindicated in individuals with a known history of hypersensitivity to any of its components. Furthermore, the suspension is labeled FOR TOPICAL OPHTHALMIC USE ONLY and is explicitly NOT FOR INJECTION. The safety profile confirms that the risk is predominantly localized, although rare systemic risks are formally documented by regulators.

Overdose and Emergency Response

Overdose and when to seek help

The official overdose profile for InfectoMyk (Natamycin Ophthalmic Suspension) is defined by its regulatory constraints as a topical medication with poor systemic absorption. Regulatory information states that systemic absorption should not be expected following the intended ocular application, meaning a typical systemic overdose syndrome is not documented for this route.

The primary overdose concern is associated with accidental oral ingestion, which may be harmful if the suspension is swallowed. In such cases, official documentation mandates seeking immediate medical attention.


Official Regulatory Response

The required action for any confirmed or suspected overdose event is immediate contact with a medical professional. Urgent medical help must be sought if serious symptoms occur, such as passing out, trouble breathing, or signs of a serious allergic reaction. The official instruction is to call a Poison Control center at once. Management for overdose is restricted to symptomatic and supportive treatment, as no specific antidote is officially known or documented for natamycin. No population-specific overdose notes (e.g., for pediatric or geriatric patients) are explicitly detailed in regulatory overdose sections.

Overdose Context Constraint Regulatory Statement
Expected Systemic Exposure Systemic absorption should not be expected
Primary Overdose Risk Accidental oral ingestion
Required Immediate Action Call a Poison Control center or seek emergency medical attention

Therapeutic Uses of InfectoMyk

What InfectoMyk Treats: Main Uses and Benefits


Relief from Sudden Symptom Flare-ups and Intensification

InfectoMyk is relevant in areas where short-term symptom management is appropriate, particularly concerning symptoms related to physical discomfort or inflammatory or irritative states of the ocular surface. It is applied where additional symptomatic support is needed for specific fungal conditions. It is intended to help with symptoms related to inflammatory or irritative states, contributing to easing the overall symptom load and providing supportive relief when symptoms intensify temporarily.

Supportive Management for Disruptive Symptom Patterns

This medication supports the patient during phases of increased distress or discomfort by helping address symptom clusters that may become intense or disruptive. It is commonly used when groups of symptoms create noticeable physiological strain or interfere with daily functioning, assisting with maintaining functional stability during symptomatic periods. InfectoMyk is generally applicable across conditions characterized by periods of heightened symptoms or involving episodic manifestations, offering symptomatic relief that helps patients cope more steadily.

Quick Fact: Supports Easing of Physical Discomfort


Eligibility and Restrictions for Use

InfectoMyk (Natamycin Ophthalmic Suspension) eligibility is defined by official regulatory criteria, detailing who is permitted to use the medicine and who is formally excluded or restricted.

Contraindications and Restrictions

Use of InfectoMyk is contraindicated for any individual with a history of hypersensitivity or allergic reaction to natamycin or to any other component in the suspension. Regulatory labeling mandates the product is strictly for Topical Ophthalmic Use Only and must not be administered by injection.

Age and Physiological Eligibility

Use is generally established for adults and older adults (geriatric patients), where regulatory data shows no overall differences in safety or effectiveness compared to younger adults.

  • Pediatric Patients (Children): Safety and effectiveness in this population have not been established by regulatory authorities.
  • Pregnancy and Lactation: Use during pregnancy (Category C) is restricted and should occur only if clearly needed. Caution is required when administering to nursing mothers.

Conditional Use

Eligibility is conditional based on treatment status. Patients being treated for the approved fungal infections (blepharitis, conjunctivitis, or keratitis) must not wear contact lenses during the course of therapy. Additionally, the drug's effectiveness as a single agent for treating fungal endophthalmitis has not been established.

What should I know about interactions with other medicines?

InfectoMyk (natamycin ophthalmic suspension) exhibits an official interaction profile determined by its local administration and documented negligible systemic absorption. This characteristic is the primary basis for the absence of expected systemic pharmacokinetic drug interactions, as plasma concentrations are typically not measurable following topical use.

Documented Interaction Requirements

Interaction Type Requirement as Stated in Regulatory Sources
Systemic Pharmacokinetic No clinically significant systemic interactions are documented, including those mediated by CYP450 enzymes.
Local Administration Timing Co-administration with other topical ophthalmic preparations requires a mandatory separation of 10 to 15 minutes to prevent wash-out and ensure adequate local exposure.
Topical Corticosteroids Concurrent use of corticosteroid eye medications is formally restricted or contraindicated in authoritative drug summaries based on the potential for an adverse local pharmacodynamic effect.
Food, Alcohol, Supplements No specific interactions with food, alcohol, or herbal products are documented in official prescribing information.

This structure ensures that the primary focus of the regulatory data remains on local administration constraints and specific drug class restrictions, while confirming the lack of documented systemic interaction risk.

Mechanism of Action

The mechanism of InfectoMyk is fundamentally defined by its highly specific action at the cellular level of fungal pathogens, resulting in a fungicidal action restricted to the site of application.

Targeted Fungal Membrane Disruption

The active substance initiates its action by selectively binding to ergosterol, a unique sterol molecule vital to the structure of the fungal cell membrane. The mechanism is driven by this high-affinity interaction, as ergosterol is essentially absent from human cells. This targeted binding is the core distinguishing feature of the drug's activity, restricting the cytotoxic action to cells containing ergosterol.

Cascade of Pore Formation and Cytotoxicity

The molecular binding of the drug to ergosterol triggers the formation of transmembrane pores (or channels) in the fungal cell membrane. This structural damage causes an immediate and uncontrolled efflux of vital intracellular components, such as K^+ ions and nutrients. This results in catastrophic osmotic imbalance and metabolic failure, which is the fungicidal mechanism that leads to the cessation of fungal cellular survival and proliferation.

Functional Constraint of Surface Action

The entire mechanism is functionally restricted by the drug's physicochemical properties, which limit its penetration into deeper tissues. Consequently, the fungicidal cascade is functionally constrained to the ocular surface and superficial layers. This constraint defines the physiological boundaries of the drug’s mechanism, defining the scope of its mechanism as localized cytotoxicity.

Dosage and Administration Information

InfectoMyk (Natamycin Ophthalmic Suspension 5%) is strictly administered via the topical ophthalmic route, meaning it is instilled into the conjunctival sac for local action; the medicine is explicitly not approved for injection or any other route. Standard usage protocols include the requirement for the suspension bottle to be shaken well before use to ensure the uniform distribution of the active ingredient.

The standard administration unit is one drop. However, the frequency pattern is determined by the infection type. For severe fungal keratitis, the starting schedule is rigorous: one drop is instilled at hourly or two-hourly intervals for the first three to four days. Once improvement is noted, this frequency is typically reduced to six to eight times daily. For less severe infections, such as fungal blepharitis or conjunctivitis, the initial regimen is typically four to six daily applications.

The total duration of therapy is typically extended, generally continued for 14 to 21 days or until the active fungal infection has resolved. A key instruction is the requirement to gradually reduce the dosage frequency over 4- to 7-day intervals before full treatment discontinuation. The safety and effectiveness of the suspension have not been established for pediatric patients, though no specific dose adjustments are noted for older adults.

Recent Clinical Evidence

Research evidence / Overview of studies for InfectoMyk


Evidence for Use in Specific External Fungal Infections of the Eye

The research was conducted on the treatment of specific external fungal infections of the eye, such as fungal keratitis (an infection of the clear front surface of the eye). The evidence base is characterized by the presence of multiple Randomized Controlled Trials (RCTs). These studies were designed to explore the agent in adult populations compared to other available antifungal agents or against a non-medicated control solution.

The research examined several outcomes related to the course of the infection. Key measurements included mycological outcomes, which determine if the fungal organism could no longer be detected in culture. Studies also monitored clinical outcomes such as the time it took for the corneal surface to change and the change in visual function was measured over the study period. Findings describe patterns observed in the studies regarding the rate of fungal non-detection and the subsequent changes in the physical signs of the infection.


Research Examining Outcomes in Comparative Studies

The research included comparative studies where the agent was evaluated in relation to other treatments currently used in research exploring ocular fungal infections. This research contributes to the broader evidence landscape by showing how different treatments were associated with the progression of the active infection.

Findings indicate that the outcomes measured may vary significantly depending on which specific fungal species was studied. The data show patterns related to outcomes in studies focused on Fusarium species compared to Aspergillus species, suggesting different patterns may occur based on the type of pathogen.


Study Duration and Long-Term Observation Periods

The primary follow-up durations were limited to an intermediate period, typically around three months (90 days). While these intermediate-term results were observed in some studies, the long-term effects are not fully established. There is limited information for long-term outcomes that track the durability of the corneal surface status or the potential for vision changes years after the infection has cleared.


Evidence Gaps and Areas for Future Study

A key limitation is the inherent challenge in achieving adequate drug penetration to be studied in infections that are deep-seated within the structure of the cornea. Evidence limited regarding the use of InfectoMyk in pediatric patients (children). Research is ongoing to address these areas where data for certain groups remain insufficient.

Frequently Asked Questions (FAQ)

Common questions about InfectoMyk (FAQ)

Q: If I feel better after a few days, can I assume the medicine has worked?

A: Official guidance emphasizes that symptoms may begin to improve before the fungal infection is completely eliminated. For this reason, the medication is generally continued for the full duration prescribed by a healthcare provider. Stopping use before the prescribed duration may be associated with an increased risk of the infection returning or exhibiting resistance.

Q: What are the signs that a side effect may require calling a doctor?

A: Regulatory documents list severe allergic reaction symptoms, such as swelling of the face, throat, or tongue, and difficulty breathing, as serious adverse reactions. Severe events like chest pain or extreme eye pain are also noted in the safety profile. These symptoms are noted as serious events that require immediate clinical review.

Q: Is a skin rash a common reaction when starting InfectoMyk?

A: Common adverse reactions listed in official documents are primarily localized to the eye, including irritation, increased tearing, and the feeling of a foreign body in the eye. Skin rash is not listed as a common reaction. However, a skin rash can be a potential sign of a serious allergic reaction (hypersensitivity), which is noted as a serious event requiring prompt clinical review.

Q: Can I take pain relievers like ibuprofen or acetaminophen with InfectoMyk?

A: According to the official product information, the drug is applied topically to the eye, and systemic absorption into the bloodstream is not expected. Due to this negligible systemic absorption, no significant systemic interactions with other common systemic medications, such as oral pain relievers, are documented.

Q: Does InfectoMyk interact with any common blood thinners?

A: Official labeling states that InfectoMyk has negligible systemic absorption, meaning very little of the drug reaches the bloodstream. Because of this, no clinically significant systemic drug interactions are known or documented, which would include oral systemic medications.

Q: Is InfectoMyk likely to affect how my birth control works?

A: Based on the official product information, InfectoMyk is not expected to affect oral hormonal contraceptives (birth control). This is because systemic absorption is negligible after topical use, and therefore, no clinically significant systemic interactions are documented.

Q: Are there specific lifestyle changes that official sources suggest when taking InfectoMyk?

A: Official prescribing information states that the medicine is contraindicated for use with contact lenses for the duration of the therapy. This is a key restriction noted in the official labeling for patients being treated for the fungal eye infection.

Q: Is there a risk of the infection becoming resistant to InfectoMyk?

A: Official patient guidance notes that skipping doses or stopping treatment too early may be associated with an increased chance of the fungal infection returning or exhibiting resistance. The full prescribed regimen is used to minimize this potential association.

Q: What happens if InfectoMyk does not work for my condition?

A: Regulatory information indicates that a failure to show improvement after 7 to 10 days of administration suggests the infection may be caused by a microorganism that is not susceptible to the medication. In this situation, official guidance states that continuation of therapy requires clinical re-evaluation by a healthcare provider.

Q: Do I need to have regular blood tests while using InfectoMyk?

A: No systemic monitoring parameters, such as blood tests, are documented as generally required by official sources. This is consistent with the drug’s local-only action and negligible systemic absorption.

Q: Can InfectoMyk cause dizziness or affect a person's ability to drive?

A: The official safety profile does not list dizziness as a common side effect. However, patients may experience temporary blurred vision after applying the drops. Official patient guidance notes that a person may need to wait several minutes for vision to clear before driving or operating machinery.

Q: Is it normal to experience a stomach upset or nausea when taking this medication?

A: Adverse reactions listed in the official documents primarily include localized ocular effects (eye irritation, tearing, foreign body sensation). Systemic symptoms like nausea or stomach upset are generally not listed among the common side effects of this topical medication.

Q: Is InfectoMyk safe for people who have liver-related health issues?

A: Based on official drug summaries, InfectoMyk's negligible systemic absorption means that no dose adjustments are indicated for patients with hepatic impairment (liver issues). This information is consistent across regulatory data.

Q: Can InfectoMyk be used by people who have kidney problems?

A: Official drug summaries indicate that due to the negligible amount of drug absorbed into the body, no dose adjustments are indicated for patients with renal impairment (kidney issues). The drug’s action is focused on the eye’s surface.

Q: Is there any known interaction between InfectoMyk and caffeine?

A: Regulatory documents confirm that no significant systemic interactions are known or found. Given that the medicine has negligible systemic absorption, no interaction with common systemic compounds like caffeine is expected.

Q: Is it correct that InfectoMyk is part of the azole class of medicine?

A: The official classification of the active ingredient, natamycin, is a tetraene polyene antibiotic (an antifungal drug). It is therefore not categorized as a member of the azole class of medications.

Q: What is the difference between a fungistatic and a fungicidal medication?

A: Regulatory documents describe the active ingredient as predominantly fungicidal. This means its primary action is to directly destroy susceptible fungal cells. In contrast, a fungistatic action is one that inhibits the growth of the fungi without necessarily destroying the cells.

Q: If I am taking multiple medications, how can I check for possible interactions with InfectoMyk?

A: Official patient information states that individuals should provide their healthcare provider with a list of all prescription and nonprescription drugs, vitamins, and supplements they are using. Your provider can then review this list against the documented interaction profile.

Q: Are there any reports of breakthrough bleeding mentioned for those using oral contraceptives with InfectoMyk?

A: Due to the negligible systemic absorption and documented lack of systemic interactions, reports of this type of effect are not noted in the official regulatory labeling for this medicine.

Q: What is the risk of harm if a healthy person accidentally takes a dose?

A: The medicine is explicitly labeled FOR TOPICAL OPHTHALMIC USE ONLY. In the event of accidental ingestion of any eye product, the user should contact a poison control center or emergency room at once, as the safety profile is based only on application to the eye.

Q: If I miss a dose of InfectoMyk, what is the general guidance?

A: General patient guidance is available for missed doses, which outlines when to apply the dose or when to skip the dose to maintain the scheduled treatment frequency. The guidance advises against using extra medicine to compensate for a missed dose.

Q: How long after starting InfectoMyk do people typically notice an improvement?

A: For severe infections, the initial rigorous dosing frequency can typically be reduced after the first three to four days. This is the timeframe suggested in the regulatory text for when initial clinical improvement is usually noted.

Q: What type of monitoring is usually required while on this drug?

A: Official regulatory guidance indicates that your healthcare provider should check your progress at regular visits. For certain eye infections, this monitoring schedule may be as frequent as several times a week.

How should InfectoMyk be stored and disposed of?

Official Storage and Disposal Requirements

InfectoMyk (Natamycin Ophthalmic Suspension) requires strict environmental and handling controls as defined by regulatory labels. The medication must be stored at a controlled temperature range, specifically between 2 C and 24 C (36 F and 75 F). The label states to protect the product from light and avoid excessive heat. Critically, the product must not be frozen.

To maintain sterility, the container must be kept tightly closed, and the dropper tip must not touch any surface. Since it is a suspension, the contents must be shaken well before each use. The medication should be kept out of the sight and reach of children.

Expired or unused product should be safely discarded, preferably by taking it to an authorized drug take-back program. The medicine should not be kept after the expiration date.

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

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