Bolfo

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Bolfo

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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 Bolfo

What is Bolfo? Defining the Ectoparasiticide Agent

Property Description
Active ingredient Propoxur (C11H15NO3)
Form Powder, Spray, Polymeric Collar, Concentrate
Pharmacological class N-methyl Carbamate
General use Control of external parasites (e.g., fleas, ticks)
Origin Synthetic chemical

Bolfo is a product defined as an ectoparasiticide and insecticide, primarily utilized for the control and elimination of external arthropod pests affecting domestic animals and surrounding environments. The formulation's function is entirely dependent on its single active ingredient, the synthetic compound Propoxur. The product is classified as a veterinary and environmental agent, clinically recognized for its utility in targeting pests like fleas, ticks, and lice. This agent is notably non-systemic, acting through direct contact action and stomach action, distinguishing it from agents requiring host absorption.

Propoxur: The Synthetic N-methyl Carbamate

The core chemical constituent of Bolfo is Propoxur, a synthetic chemical entity known as an acetylcholinesterase inhibitor (AChE inhibitor). Propoxur belongs to the N-methyl Carbamate pharmacological class. The mechanism involves Propoxur rapidly and reversibly blocking the activity of the acetylcholinesterase enzyme, which is vital for terminating nerve signals in pests. This neurotoxic effect establishes its basis for pest control.

This compound’s action provides a crucial fast knockdown effect, which is necessary for addressing acute infestations, while simultaneously offering a residual effect on treated surfaces, thereby prolonging the duration of protection.

Bolfo Forms: External Application for Contact Control

Bolfo is manufactured in various dosage forms tailored specifically for external (topical) application or environmental treatment, including fine dusting powders, liquid sprays, and incorporation into a polymeric matrix for collars. These versatile preparations, which combine the active Propoxur with an inert base/vehicle, ensure effective dispersion and adherence. These forms deliver the active agent for contact action, facilitating the rapid elimination of infestation, and maintaining the hygiene and comfort of the host animal.

What side effects are possible with Bolfo?

Adverse reaction scope

Feature Description
Key adverse reaction categories Local reactions associated with external application and systemic effects related to the core toxicological mechanism.
Frequency classification Occasional (used for skin irritation, corresponding to Uncommon in some regulatory systems).
System-organ classes involved Skin and Subcutaneous Tissue Disorders (due to local irritation) and Nervous System (due to the mechanism of action).
Serious adverse reactions Signs typical of neurotoxic agents in cases of severe overexposure; the active ingredient is classified as a cholinesterase inhibitor in official documents.
Population-specific safety considerations Explicit restrictions against use in puppies and kittens under 12 weeks of age, pregnant animals, nursing female pets, and animals that are unwell or recovering from illness.
Safety-related restrictions or limitations Prohibited for use concurrently or within 7 days of administering any other insecticide due to the risk of cumulative effects.

Safety classifications (high-level)

Feature Description
Regulatory frequency framework used The term "Occasional" is used in the specific product regulatory document (VMD SmPC).
Regulatory basis Statements are derived from official government health authority documentation (e.g., VMD Summary of Product Characteristics).
Context-of-use safety notes The active ingredient’s classification as a cholinesterase inhibitor dictates the fundamental safety constraint for the product.

Resulting safety structure

Regulatory safety summary:

  • Occasional skin irritation is the specifically classified local adverse reaction related to the product’s external application.
  • The product is officially restricted from use in specific vulnerable populations, including pregnant, nursing, and young animals.
  • A key safety limitation is the requirement to avoid using the product with other insecticides due to potential cumulative toxicological risk.

Connection to the overall safety profile

The official safety profile for this Propoxur-based product is primarily structured by the toxicological properties of the active ingredient as a cholinesterase inhibitor. This classification dictates the major safety constraints, including the explicit limitations on use in vulnerable populations and the prohibition of concomitant administration with other similar agents. The only frequency-classified adverse event documented relates to local skin irritation, consistent with the product’s external application route.

Overdose and Emergency Response

The official regulatory documents specify that overexposure to the active substance in Bolfo may lead to a recognized state of acute cholinergic toxicity. Manifestations documented in regulatory profiles include excessive salivation, lacrimation, vomiting, diarrhea, muscle twitching (fasciculations), generalized weakness, and miosis (pupillary constriction). Overdose severity is classified by the potential for life-threatening outcomes, including the progression to severe respiratory depression or failure, as well as central nervous system effects such as convulsions and coma.

When to Seek Urgent Help

Immediate emergency action is strictly mandated for any suspected or confirmed overexposure. Regulators require that individuals seek immediate medical attention and be transferred promptly to a medical facility for assessment.

Official Overdose Management

Management, as defined in official prescribing guidance, includes providing supportive treatment, maintaining a patent airway, and continuous monitoring of respiratory and cardiac functions. The specific antidote designated for the muscarinic effects of this toxicity is Atropine. Furthermore, certain pharmacological agents, such as Pralidoxime (2-PAM), are strictly cautioned against in this context as they may exacerbate toxicity, necessitating adherence to precise regulatory management protocols.

Therapeutic Uses of Bolfo

What Bolfo Treats: Main Uses and Benefits

The primary role of Bolfo is to provide supportive relief during episodes of discomfort that may occur in the presence of external parasites. The active substance in Bolfo is considered relevant in the therapeutic management of fleas, which are associated with significant localized discomfort. It is commonly used to help address symptom clusters that may appear suddenly or fluctuate, such as symptoms related to inflammatory or irritative states.


Managing Discomfort in Acute Episodes

Bolfo is generally applied in contexts where an acute parasitic presence creates noticeable physiological strain. It is relevant in areas where short-term symptom management is appropriate for symptoms related to inflammatory or irritative states. Applied in scenarios where additional management of discomfort is required, it assists the pet during episodes of heightened discomfort and contributes to easing the overall symptom load.

Benefits for Symptom Stability

The product is applicable within clinical settings that involve recurrent or episodic manifestations of parasitic activity. It plays a role in managing conditions characterized by periods of heightened symptoms, and may assist with maintaining functional stability. This supportive action helps improve day-to-day comfort during symptomatic periods.


“Applied across domains where additional symptomatic support is needed.”

Quick Fact: Supports Management of Irritative Symptoms

(Bolfo is commonly used to help address symptoms related to physical discomfort in situations involving parasitic activity.)

Regulatory References

  1. SUMMARY OF PRODUCT CHARACTERISTICS

Eligibility and Restrictions for Use

Bolfo is a veterinary antiparasitic product containing propoxur, a carbamate insecticide, or in some formulations, imidacloprid. It is indicated for the control of external parasites, primarily fleas and ticks, in dogs and cats.


Who Can Use Bolfo?

Bolfo is typically safe for use on generally healthy, non-convalescent adult dogs and cats. Specific age and weight requirements vary significantly depending on the product type (e.g., collar, powder, spot-on, spray) and the specific active ingredient.

  • Propoxur formulations (e.g., collars, powders) are generally intended for use on animals over 3 months of age (puppies and kittens).
  • Imidacloprid formulations (e.g., spot-ons) may be indicated for kittens/puppies 8 weeks of age and older, subject to specific weight limits.

Contraindications (Who Cannot Use Bolfo)

Use of Bolfo products is generally contraindicated in the following cases:

Category Contraindication Details
Age/Health Puppies and kittens under the specified minimum age (typically 3 months for propoxur, or younger based on product data), sick, cachectic, or convalescent animals.
Sensitivity Animals with a known hypersensitivity or allergy to the active ingredient (propoxur or imidacloprid) or any other component.
Concomitant Use Animals receiving concurrent treatment with other cholinesterase-inhibiting products, such as organophosphates, as this can increase toxicity.
Specific States Pregnant or lactating females, unless a veterinarian determines the benefit outweighs the potential risk.
Skin Condition Animals with injured or damaged skin where the product is to be applied.

Note: Bolfo is an animal-only medication. It must never be used on humans.

What should I know about interactions with other medicines?

Interactions with other medicines and products

The interaction profile for Bolfo, whose active ingredient is the externally applied Propoxur, is defined by its chemical classification and the resulting constraints documented by regulatory authorities.


Interaction Scope

Detail Official Regulatory Statement
Medicinal product categories with documented interactions: Other Insecticides, specifically those that function as Cholinesterase Inhibitors (e.g., Organophosphorus compounds and other Carbamate insecticides).
Mechanistic basis of interactions: Pharmacodynamic Interaction: Reversible inhibition of acetylcholinesterase, posing a risk of joint toxic action and additive cholinergic effects when co-exposed with agents of the same toxicological class.
Timing-based interaction rules: Mandatory Separation: Official regulatory labeling states, "Do not use any other insecticide concurrently or within 7 days of last use."
Interaction-related restrictions: Strictly restricted co-administration with other insecticides; limited to a minimum of seven days separation.

Interaction Classifications (High-Level)

Classification Official Regulatory Statement
Interaction severity classification: Toxicity-Based Concern: Classification focuses on potential for cumulative toxicity due to the common mechanism of action.
Population-specific interaction notes: None Documented. No specific changes in interaction profile for defined populations are noted in the official regulatory information.

Resulting Interaction Structure

Official interaction statements:

  • The active ingredient Propoxur is classified as an N-methyl Carbamate. Due to the risk of additive effects, regulatory documents state that no other insecticide should be used concurrently or within seven days of the last application.
  • No specific drug-drug, food, alcohol, or metabolic interactions are documented in the official regulatory profile for this externally applied product.

The official interaction profile is strictly defined by an explicit timing-based restriction regarding the use of other insecticides, which is a required regulatory constraint. This requirement is driven by the inherent risk of additive pharmacodynamic effects from agents sharing the cholinesterase-inhibiting mechanism. The profile otherwise notes the absence of documented systemic drug-drug, metabolic, transporter-mediated, or food interactions.

Mechanism of Action

Direct Engagement with GABA A Receptors

Bolfo's mechanism is defined by its selective interaction as a positive allosteric modulator of the GABA A receptor complex, the primary inhibitory neurotransmitter receptor in the central nervous system. This interaction occurs at a distinct allosteric site, separate from where the endogenous ligand, GABA (gamma-aminobutyric acid), binds.

Attenuation of Signal Transduction

By binding to the allosteric site, Bolfo induces a conformational change in the GABA A receptor protein. This modulation enhances the receptor's sensitivity to GABA, resulting in an increased frequency of opening of the receptor's integral chloride ion channel. The subsequent influx of negative chloride ions leads to neuronal hyperpolarization.

Resulting Systemic Physiological Adjustment

This potentiation of inhibitory signaling triggers a downstream cascade, counterbalancing the activity of excitatory mediators within neural circuits. The net result of this cellular mechanism is a controlled reduction in neuronal excitability and a restriction of the magnitude of dysregulated signaling, driving predictable pharmacological adjustments in systemic responsiveness.

Dosage and Administration Information

The use of Bolfo is structured around precise, topical application methods, as the product is designed for external, contact action. Administration is via specific formulations including a spray, dustable powder, or a polymeric collar. The administration route is exclusively dermal or applied to environmental surfaces such as pet bedding.

Administration and Schedules

The usage pattern depends on the formulation chosen. The powder and spray products are typically intended for intermittent use, often directed on a weekly schedule for routine control. In the case of acute, heavy infestations, some labels direct the use of the product daily for a short course of 2 to 3 days, immediately followed by the standard weekly regimen. Collar formulations are designed for sustained, continuous wear to provide protection over several months.

Application Technique and Constraints

Dosing for spray forms is often defined by the duration of the spray time (e.g., 3 to 10 seconds), which is correlated with the animal's size. For powders, the instructions mandate applying the product to a dry coat, followed by gently rubbing the product against the growth of the hair to ensure it reaches the skin. For effective control, guidelines indicate that all animals in the same environment should be treated simultaneously. A critical label restriction concerns the minimum age for use, with specific limitations for puppies and kittens often detailed for animals under 4 or 12 weeks of age, depending on the product form.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Bolfo

Absence of Therapeutic Evidence for Human Use

Bolfo contains the substance Propoxur. It is important to know that no human clinical trials have been conducted for any medical condition, and the product is not a medication approved or regulated for human therapeutic use. Because of this, information regarding any potential therapeutic effects, appropriate dosage, or suitability for human conditions remains completely unstudied and unavailable. There is an absence of research that would explore human therapeutic outcomes, such as changes related to physical discomfort or outcomes reflecting daily functioning.

Long-Term Outcomes and Follow-up Data

Since human clinical research is absent, no studies were conducted to monitor patient outcomes or assess long-term effects over defined time intervals. Therefore, there are no findings that describe how symptoms might evolve or how potential effects might be maintained over extended periods, such as six months, one year, or longer. There are no data available for long-term effects or the durability of outcomes because no follow-up studies were observed in human patients.

Evidence in Special Patient Populations

Clinical research often was studied for specific human populations to explore how outcomes may differ across groups, such as children, older adults, pregnant individuals, or those with co-existing conditions. For Bolfo, there are no data available for these special populations. Because the product was not studied for human therapeutic use, data for certain groups remain insufficient. This means research has not explored any changes related to systemic or functional imbalance or outcomes describing episodic changes in these sensitive groups.

What Remains Uncertain About Bolfo

The central finding from reviewing the evidence is the complete uncertainty regarding human use. Since no human clinical trials were observed in relation to any medical condition, every aspect of potential human therapeutic application remains uncertain and unknown. Research has not been able to explore short-term symptom changes, evaluate how symptoms are measured in humans, or monitor physiological strain. Results apply only to the populations studied (which are non-human). The absence of therapeutic studies means limited information for long-term outcomes and a total lack of evidence that could contribute to human medical understanding. Findings describe group patterns, not personal outcomes.

Key Studies & References

  1. Propoxur (Baygon) - EPA (Environmental Protection Agency) document on toxicity and use classification
  2. Propoxur - Hazardous Substance Fact Sheet (NJ Department of Health)
  3. 271. Propoxur (WHO Pesticide Residues Series 3) - INCHEM Monograph, detailing chemical identity and biological effects (non-therapeutic)
  4. Carbamate Toxicity - StatPearls - NCBI Bookshelf (Review of non-therapeutic human toxicity/poisoning)
  5. Propoxur (CAS 114-26-1) - Cayman Chemical (Note on non-human/non-veterinary use)

Frequently Asked Questions (FAQ)

Common questions about Bolfo (FAQ)

Q: Is Bolfo safe for use by older adults or seniors?

Official regulatory documents state that Bolfo is an animal-only product and has not been studied or approved for human use in any age group. For animals, the official label prohibits use in pets that are sick or recovering from illness. However, the available regulatory information does not provide specific details on the use of Bolfo in 'senior' animals as a separate population group.

Q: How is Bolfo different from other medicines used for the same condition, such as [Name of similar drug]?

The active ingredient in Bolfo, Propoxur, is classified as an N-methyl Carbamate, which is a type of cholinesterase inhibitor. Bolfo is described as a non-systemic agent, meaning its distinct mechanism relies entirely on contact and stomach action on the external pests it is designed to control, unlike treatments that are absorbed internally.

Q: Is Bolfo known to cause issues with mood, anxiety, or sleep?

Official information indicates that the active ingredient is a cholinesterase inhibitor that interacts with the central nervous system. Symptoms related to overexposure can include neurotoxic signs such as dizziness and loss of coordination. However, specific regulatory labels for veterinary products typically do not detail or classify symptoms such as changes in mood, anxiety, or sleep patterns.

Q: Are there any known severe but rare allergic reactions associated with Bolfo?

Official safety documents state that hypersensitivity (an allergic reaction) is a listed contraindication for using Bolfo. Furthermore, the documents describe potential severe reactions as signs of neurotoxicity—a systemic effect typical of carbamate poisoning—which can occur in cases of significant overexposure.

Q: Is it necessary to take Bolfo at the exact same time every day?

According to the official product information, Bolfo is typically applied on an intermittent schedule, such as weekly for routine control, or daily for a short initial course. Regulatory documentation focuses on the frequency of application and does not mandate that external, intermittent applications must occur at the exact same time of day.

Q: What is the general advice if a dose of Bolfo is missed?

Official regulatory guidance indicates that if a scheduled application is missed, the recommended procedure is to consult a veterinarian for specific instructions. As an animal-only product, advice for handling missed treatments is left to the discretion of a qualified animal healthcare professional.

Q: Does Bolfo affect the ability to drive or operate machinery?

Official regulatory warnings classify Bolfo as a highly toxic chemical that is strictly for animal use only. It is explicitly prohibited from being used on humans. Therefore, official safety documents do not provide guidance regarding human activities like driving or operating machinery.

Q: What kind of monitoring is typically recommended while taking Bolfo?

For individuals who work with the active ingredient, official worker safety documents recommend monitoring the body's cholinesterase enzyme levels. For animals, specific long-term monitoring is generally left to veterinary discretion for sick or convalescent animals.

Q: Why is Bolfo only available with a prescription?

Bolfo's active ingredient is officially classified as a Cholinesterase Inhibitor and a Highly Hazardous Pesticide. This classification of high toxicity necessitates controlled distribution by regulatory bodies, often through prescription or specific professional licensing, to ensure the product is used correctly and safely.

Q: Is it normal to feel a mild headache when first starting Bolfo?

According to hazard summaries, a headache is listed as a potential symptom of exposure or mild poisoning associated with the active ingredient. This is consistent with its classification as a cholinesterase inhibitor, which can affect the nervous system.

Q: Can Bolfo be crushed or split if the pill is difficult to swallow?

Official product information states that Bolfo is only formulated as an external spray, powder, or collar for topical application; it is not available as an oral pill. Therefore, the regulatory documents do not provide any instructions or permission to crush or split the product.

Q: How long does Bolfo typically remain in the body's system?

Official classification states that Bolfo is a non-systemic product. This means it is designed to act by external contact and stomach action against pests, and is not intended to be absorbed into the host animal's body system.

How should Bolfo be stored and disposed of?

Storage and Disposal of Bolfo

The storage and disposal requirements for Bolfo (Propoxur) products, such as the collar, are mandated by official product labeling to maintain stability and ensure safety.

Required Storage Conditions

The product must be stored at a temperature not exceeding 25°C and be kept in a dry place protected from light. It is mandatory to keep the product in the original unopened container and its protective pouch until immediate use. For safety, Bolfo must be stored out of the reach and sight of children and pets and away from food and animal feed.

Disposal Instructions

Used collars and empty packaging must be disposed of in the trash. The product label explicitly states not to reuse the container or the used collar. Disposal must be managed so as not to contaminate water, food, or feed. Unused product that cannot be used as directed should be handled by consulting an official Environmental Control Agency for waste guidance.

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

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