Trifloxystrobin

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Trifloxystrobin

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Medically reviewed

Marina Burgos

Last updated on 10/01/2026

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 Trifloxystrobin

Quick Facts

Property Description
Active ingredient Trifloxystrobin
Form Water-dispersible granules, Liquid suspensions (Agricultural use only)
Pharmacological class Strobilurin fungicide (Quinone Outside Inhibitor)
Common use Broad-spectrum fungal disease control on crops
Regulatory Status Regulated as a Pesticide

Trifloxystrobin is the International Nonproprietary Name (INN) for a chemical compound used exclusively in the agricultural sector to protect a wide array of food and ornamental crops from destructive fungal diseases. It is not approved for use as a pharmaceutical drug in human medicine.

This compound belongs to the strobilurin class of antifungal agents, which are synthetic derivatives inspired by natural compounds found in wood-decaying mushrooms. The substance is valued for its versatility in controlling fungal pathogens like powdery mildews, rusts, and leaf spots across numerous crops, including cereals, fruits, and vegetables.

Mechanism and Action

Pharmacological studies confirmed that Trifloxystrobin acts as a potent respiration inhibitor. It is categorized as a Quinone Outside Inhibitor (QoI) because it specifically blocks the electron transport chain within the mitochondria of the fungal cell. This mechanism effectively starves the pathogen by preventing the energy production it needs to survive and grow.

What differentiates this compound is its mesostemic activity, meaning the chemical is absorbed by the plant’s waxy layer and gradually releases a protective vapor, offering long-lasting prevention against new infections. Reviews have established safe residue levels (tolerances) in various food commodities, reflecting its use in crop protection to maintain the global food supply.

What side effects are possible with Trifloxystrobin?

Trifloxystrobin is an agricultural fungicide and is not approved for human therapeutic use. Consequently, no official U.S. FDA DailyMed label or European Medicines Agency (EMA) Summary of Product Characteristics (SmPC) exists detailing a clinical adverse reaction profile, side-effect frequency classifications, or population-specific safety notes associated with human medicinal use.

Regulatory Safety Context

The safety information available is derived from regulatory risk assessments conducted by government bodies, such as the U.S. Environmental Protection Agency (EPA), focusing on environmental impact, occupational handler safety, and dietary risk. Safety standards for this compound are established through the regulation of residue levels and occupational exposure.

High-Level Safety Patterns

The safety profile is structured around toxicological findings rather than clinical trial data. The EPA documents potential hazards associated with direct handling, classifying the compound as a strong dermal sensitizer (skin allergen) and a potential mild irritant to the skin and eyes upon acute exposure. Chronic toxicity studies reviewed by regulatory bodies have consistently identified the liver as a primary target organ for potential effects following repeated exposure.

Safety Constraints

Official safety is defined by the maximum allowable levels of residues (tolerances) legally set by the government for various food commodities [40 CFR § 180.555]. Furthermore, regulatory reviews ensure that aggregate dietary exposure, including for infants and children, meets the reasonable certainty of no harm standard, underpinning the established safe residue limits.

Overdose and Emergency Response

Overdose and when to seek help

The official profile for human acute exposure to Trifloxystrobin is strictly derived from regulatory toxicology and hazard safety documents, as it is classified as an agricultural fungicide and is not approved for human pharmaceutical use. Exposure information is based on documented poisoning scenarios, not pharmaceutical labeling.


Documented Exposure Manifestations

Regulatory classifications indicate the substance has a generally low acute toxicity profile following oral and dermal contact. However, the compound is formally classified as a Skin Sensitiser, with the potential to cause an allergic skin reaction, and is listed as Harmful if inhaled (Acute Toxicity Category 4). The liver is identified as a target organ in chronic animal toxicology studies. Population-specific warnings note that the substance May cause harm to breast-fed children.


Required Emergency Actions

Immediate medical attention is required for accidental ingestion or severe inhalation exposure. Regulatory guidance mandates that you Call a physician or poison control center immediately in these situations. Management should be symptomatic and supportive, as no specific antidote is known. Specific procedural instructions state that exposed individuals should Do NOT induce vomiting. Supportive measures such as the administration of activated charcoal are indicated only following significant ingestion. Further guidance advises seeking medical advice if symptoms, such as persistent skin irritation or breathing difficulties, occur.

Therapeutic Uses of Trifloxystrobin

Trifloxystrobin is used on numerous agricultural commodities and is commonly used across conditions presenting with heightened symptoms. This fungicide is primarily used for managing and helping address visible fungal manifestations such as powdery mildews and rust pustules, and may assist with managing symptoms that create noticeable physiological strain.

This treatment is relevant for easing symptom clusters that may become intense or disruptive and supports the crop when symptoms create noticeable physiological strain. It provides supportive relief that helps ease the overall symptom burden by assisting with managing recurrent infections during periods of heightened symptoms. The treatment is considered relevant in situations where disruptive manifestations are experienced across key target crops including cereals, various fruits, and high-value vegetables. Its main benefit contributes to easing the overall symptom load and contributes to improved comfort during periods of heightened symptoms to assist with maintaining functional stability.

“This application is relevant in contexts involving heightened systemic burden, where supportive symptomatic assistance is appropriate.”

Quick Fact: Support for Fungal Disease Symptoms
Trifloxystrobin is commonly used to help with acute or recurrent symptomatic episodes characterized by visible fungal growth and tissue damage, supporting overall crop stability.

Eligibility and Restrictions for Use

The eligibility profile for Trifloxystrobin is defined solely by its classification as an agricultural fungicide, regulated by bodies such as the U.S. Environmental Protection Agency (EPA), not as a human medicine.

Eligibility Classification Status based on Regulatory Documents
Use for Human Treatment Contraindicated. The compound is not approved by the FDA, EMA, or any other global authority as a pharmaceutical drug for human medicine, precluding its use as a treatment.
Occupational Use Conditional. Use is restricted to licensed applicators and workers who must comply with specific label requirements, including mandatory Personal Protective Equipment (PPE) and site access restrictions.

Eligibility-Related Restrictions

  • Restricted Entry: Non-handlers are prohibited from entering treated agricultural areas until the Restricted-Entry Interval (REI), as specified on the product label, has expired.
  • Age Groups (Consumption): Eligibility for the general population, including infants and children, is addressed by the EPA's requirement to establish safe food residue tolerances. This ensures a determination of "reasonable certainty of no harm" from dietary exposure.
  • Comorbidity/States: Patient-based rules regarding hepatic impairment, renal function, or physiological states are not applicable, as the substance is not clinically prescribed.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Trifloxystrobin is classified and regulated as an agricultural fungicide and is not approved for use as a pharmaceutical drug in human medicine. Consequently, there is no official regulatory document, such as a U.S. Food and Drug Administration (FDA) Prescribing Information or European Medicines Agency (EMA) Summary of Product Characteristics (SmPC), that details drug-drug interaction studies or specifies interaction patterns for co-administration with other human medicines.


Interaction Scope and Regulatory Basis

Interaction Entity Official Regulatory Status
Documented Drug-Drug Interactions None documented in human drug labels.
Metabolic (CYP) Interactions No formal studies published in human drug monographs.
Contraindicated Combinations None established.
Timing / Separation Requirements None established.

Connection to the Official Interaction Profile

The regulatory profile for this substance is defined by environmental and agricultural authorities, not by human pharmaceutical bodies. This classification leads to a complete absence of documented pharmacokinetic, pharmacodynamic, or co-administration restrictions in official sources. Trifloxystrobin’s official documentation focuses solely on establishing safe pesticide tolerance levels for human dietary exposure, not on managing therapeutic interactions.

Mechanism of Action

Targeting the Fungal Mitochondrial Powerhouse

This mechanism is defined by the selective blockade of the fungal pathogen's central energy-generating system. Trifloxystrobin acts as a Quinone Outside Inhibitor ( Q o), binding to the cytochrome bc1 complex (Complex III) within the mitochondrial electron transport chain. This specific molecular interaction directly interferes with the flow of electrons necessary for cellular respiration.


Cessation of Cellular Energy Production (ATP Synthesis)

The molecular inhibition of electron flow creates a rapid collapse of the electrochemical proton gradient, which is the force driving energy synthesis. This cascade immediately halts the production of Adenosine Triphosphate (ATP), rendering the pathogen metabolically inert. The resulting metabolic inertia directly stops all ATP-dependent activities, such as spore germination and hyphal growth, which is the cause of the resulting functional consequence.


Mechanism Limitations: Target Site Resistance

The mechanism is constrained by the pathogen's ability to mutate the target site. Fungal strains that acquire a single-point amino acid change, such as the Glycine-to-Alanine ( G143A) substitution, structurally prevent the Trifloxystrobin molecule from binding, thereby eliminating the inhibitory mechanism.

Dosage and Administration Information

Administration Scope

The usage of Trifloxystrobin is defined by established methods and constraints necessary for compliance with food safety tolerances.

The approved route of administration is Foliar Application, where the compound is applied directly to the plant structure as a spray. The product is often formulated as Water-Dispersible Granules, which requires mandatory dilution with water prior to field use to achieve the correct spray solution concentration. The dosing schedule is regulated not by volume but by the Rate per Area, quantified as mass of active ingredient per unit of land, with specific rates determined by the target crop.

Use Classifications and Constraints

Trifloxystrobin is used in an Intermittent/Sequential frequency pattern, applied over the growing season with a minimum interval between successive treatments. Its use is fundamentally constrained by two factors: first, the Maximum Seasonal Quantity, which is the total amount of active ingredient permitted per crop cycle; and second, the Pre-Harvest Interval (PHI). The PHI is a mandatory minimum waiting period that must pass between the final application and the crop harvest to ensure resulting residues do not exceed established limits. The administration rules are highly Commodity-Specific, meaning application rates and seasonal limits are adjusted based on the specific crop or crop subgroup being treated.

Connection to the Overall Use Protocol

The framework defines a strict protocol that begins with establishing the correct commodity-specific application rate and culminates with adherence to the Pre-Harvest Interval (PHI). This structure ensures that the intermittent foliar application remains within the maximum quantity limits necessary for compliance with mandated residue tolerances.

Recent Clinical Evidence

Research evidence / Overview of studies for Trifloxystrobin

Research on Potential Human Applications and Scope

The authoritative research on Trifloxystrobin describes the compound's use as a fungicide in the agricultural sector, protecting crops from fungal diseases. Studies have not explored the use of this compound for treating human conditions. No official medical regulatory bodies, such as the U.S. Food and Drug Administration (FDA) or the European Medicines Agency (EMA), have evaluated or approved this compound for human therapeutic purposes. Official regulatory reviews were conducted by non-medical agencies, which are used to examine safe limits for residues on food products and explore environmental impact. This clearly describes the non-medical scope of the existing research.

The Research Landscape and Types of Studies Available

Because the compound is not a pharmaceutical drug, the research landscape does not include the types of studies used to evaluate human medicine, such as large-scale Randomized Controlled Trials (RCTs). Instead, the available scientific research has examined toxicological outcomes related to safety limits and environmental exposure. Research was conducted to inform the establishment of legal residue levels (tolerances) for food commodities. These findings provide context for potential human risk from exposure, rather than therapeutic effect.

Evidence in Special Populations and Subgroups

No human populations have been included in studies for therapeutic effectiveness. Regulatory reviews have explored potential aggregate exposure for infants and children, with research examining the toxicological profile for these groups. These findings relate strictly to risk assessment from consuming treated produce. Research explores the data related to long-term chronic low-level exposure in these non-clinical assessments, but data related to therapeutic use in specific patient subgroups remain insufficient.

What is Still Uncertain About Trifloxystrobin’s Therapeutic Profile

The most significant area of uncertainty is the complete absence of clinical data for any human application. The lack of therapeutic data means certainty remains low regarding any clinical use. The scientific record highlights what is known about its function as a fungicide and its safety profile as a residue, but research does not determine whether an individual will respond similarly to any therapeutic intervention, as this area remains entirely unstudied.

Frequently Asked Questions (FAQ)

Common questions about Trifloxystrobin (FAQ)


Q: How quickly can I expect to see the intended effect of Trifloxystrobin?

Official information describes the action of this compound as both preventive and curative. This means that at the cellular level, the substance’s mechanism of action is designed to address fungal infections and offer protection against new ones.


Q: Is Trifloxystrobin considered safe for pregnant or breastfeeding women (non-directive)?

As this compound is an agricultural substance, there are no formal human clinical trials or drug labels addressing its use during pregnancy or breastfeeding. However, European hazard classifications include a specific warning stating that the substance may cause harm to breast-fed children (H362). Specific clinical guidance for these physiological states is not provided.


Q: What kind of studies are used to determine the safety profile of Trifloxystrobin?

The safety profile is determined through extensive toxicological studies conducted by non-medical regulatory agencies like the U.S. Environmental Protection Agency (EPA). These assessments include evaluations for acute, repeated-dose, and chronic exposure, along with studies on potential carcinogenicity, developmental effects, and neurotoxicity.


Q: Are there specific warnings about handling Trifloxystrobin that all users should know?

Official documentation describes handling precautions, which include the recommendation to Wear protective gloves (P280) and to generally avoid contact with eyes and skin. Users are advised to consult medical attention if skin irritation or a rash occurs.


Q: Is Trifloxystrobin in the same class as Azoxystrobin, and are they different?

Yes, regulatory documents classify both Trifloxystrobin and Azoxystrobin in the same group: the Strobilurin class of fungicides. This means they share the same fundamental mechanism of inhibiting fungal cell respiration. Official product descriptions, however, note that they differ in specific characteristics like how they move through the plant and their residual action.


Q: What are the most commonly reported non-serious side effects of Trifloxystrobin exposure?

Since there is no official drug label, side effects are based on toxicological data, not clinical reports. Toxicological data indicates the substance has the potential to act as a mild irritant to the skin and eyes and May cause sensitization (an allergic reaction) by skin contact. These findings primarily relate to direct exposure from handling the agricultural product.


Q: Can Trifloxystrobin cause any visible skin changes or reactions?

Yes. The compound is officially classified as a strong dermal sensitizer, which is a substance that has the potential to cause an allergic reaction on the skin. This means that upon contact, it may cause irritation, a rash, or visible inflammation.


Q: Are there different forms (like tablets or liquids) of Trifloxystrobin available for the intended use?

For agricultural use, the product is typically formulated as water-dispersible granules or liquid suspensions. Both of these forms are designed for mandatory dilution with water before being applied as a spray.


Q: Are there any specific organs the FDA or EMA have flagged as potential targets of Trifloxystrobin's effect?

Trifloxystrobin is not reviewed as a drug by the FDA or EMA. Instead, regulatory risk assessments conducted by agencies like the U.S. EPA and EFSA have identified the liver as the primary target organ for potential effects. This conclusion is based on findings from repeated, high-level toxicological exposure in animal studies.


Q: Are there any known long-term or chronic health effects associated with Trifloxystrobin exposure?

The regulatory assessments used to set safe food residue levels rely on chronic toxicity studies to determine long-term risks. These studies have identified the liver and kidneys as potential target organs for toxicological outcomes following repeated exposure in animal models.


Q: What is the definition of an 'acceptable daily intake' (ADI) for Trifloxystrobin?

The Acceptable Daily Intake (ADI) is a regulatory measure set by government agencies (like EFSA) for pesticide residues. The ADI represents the daily intake of a residue over a person's lifetime that is judged to be without an appreciable health risk. For this substance, the ADI has been established as 0.1 mg/kg body weight per day.


Q: How is Trifloxystrobin reviewed or assessed by global regulatory bodies like the EMA or FDA?

The substance is not reviewed by medical bodies like the FDA or EMA, as it is not a human drug. Instead, its assessment is conducted by environmental and food safety bodies, such as the U.S. EPA and the European Food Safety Authority (EFSA), to establish safe food residue levels and assess occupational exposure risk.


Q: Why is Trifloxystrobin considered 'Very toxic to aquatic life'?

Regulatory classification requires the substance to be labelled as Very toxic to aquatic life with long lasting effects (H410). This hazard statement is mandatory due to the results of environmental risk assessment data on the compound's potential negative impact on non-target aquatic organisms.


Q: Is Trifloxystrobin categorized as an endocrine disruptor in official reports?

Based on regulatory assessments in Europe, the compound is not considered to have endocrine disrupting properties according to specific criteria outlined in relevant chemical regulations (such as REACH).


Q: Can Trifloxystrobin be used on multiple different types of affected areas/surfaces?

Regulatory approvals specify its use on a wide variety of agricultural commodities, including numerous fruits, vegetables, cereals, and nuts. This use is highly restricted, and the application rates are commodity-specific, meaning the allowed quantity changes based on the crop being treated.

How should Trifloxystrobin be stored and disposed of?

Storage and Handling Requirements

Storage conditions for Trifloxystrobin, an agricultural fungicide, are regulated to ensure product stability and safety. The product must be stored in its original container and kept tightly closed in a cool, dry, and well-ventilated area. The required storage temperature range is 32 F (0 C) to 100 F (37.8 C). The container must be protected from freezing, and prolonged exposure to temperatures above 100 F may reduce its shelf-life. For safety, the product must be kept out of the reach of children and pets.

Disposal Instructions

Disposal must strictly follow federal, state, and local regulations for pesticide waste. Unused product must not be disposed of in household trash or down any drain. Empty, non-refillable containers must be triple-rinsed immediately after use and then disposed of by recycling or in a sanitary landfill, as approved by local authorities.

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

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