Neocidol

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Neocidol

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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 Neocidol

Property Description
Active ingredient Dimpylate (Diazinon)
Form Emulsifiable Concentrate (EC)
Pharmacological class Ectoparasiticide
Primary Use Context Veterinary medicine (External Parasites)
Origin Synthetic Organophosphorus Compound

Neocidol is a highly recognized veterinary medicinal product whose core function is the control and elimination of external parasites on livestock. Its identity is defined by the single active ingredient, Dimpylate, which classifies it as a potent, broad-spectrum ectoparasiticide. The primary use of this agent is in veterinary applications to manage widespread ectoparasitic infestations, a need clinically recognized across major livestock-producing regions.


What Type of Medicine is Neocidol?

Neocidol belongs to the ectoparasiticide pharmacological class, operating as a synthetic chemical substance that is specifically defined as an organophosphorus compound. This class of antiparasitic agents, including its active component Dimpylate, has been internationally utilized against arthropods. This indicates the molecule's well-established history as an active agent against numerous external pests, providing a differentiating factor from newer pyrethroid-based formulas. The product’s utility is the comprehensive management of pest burdens, enabling the effective control of arthropods such as ticks, mites, lice, and various flies on livestock.


Dimpylate: Composition and General Purpose

The product's fundamental purpose is achieved through its active ingredient, Dimpylate, which is the functional derivative of thiophosphoric acid esters. This compound acts as a direct, non-systemic cholinesterase inhibitor in the parasite’s nervous system. This acute neurotoxic action leads to the uncontrolled firing of nerve signals in the parasite, resulting in swift paralysis and mortality. The overall benefit is the rapid eradication of broad-spectrum external pests, a necessity in preventing skin diseases like mange and scabs.


Neocidol’s Preparation and Physical Form

Neocidol is supplied as an emulsifiable concentrate (EC), a differentiating preparation that requires mandatory dilution before any use. This concentrate consists of Dimpylate dissolved in specialized organic solvents and non-ionic surfactants. Upon mixing with water, the EC forms the required aqueous solution or dip wash. This liquid formulation dictates the intended route of administration is strictly topical application (external use only), typically via dipping tanks or high-volume sprays.

What side effects are possible with Neocidol?

Possible Side Effects and Safety Information

The official safety profile for products containing Dimpylate (Diazinon) is characterized by its classification as an organophosphorus compound, with potential for systemic effects upon significant accidental exposure. This information is derived exclusively from government regulatory and toxicological documentation.


Adverse Reaction Scope

The primary safety concern documented in regulatory texts is the potential for Cholinergic Syndrome resulting from high-level, non-prescribed exposure. Systemic effects, such as those that may occur from accidental human exposure, are often classified as Rare or Not Known in frequency in official product labeling.

System-Organ Classes Involved Serious Adverse Reactions (Label Documented)
Nervous System Disorders (e.g., headache, tremors) Severe Cholinergic Crisis (including respiratory depression)
Gastrointestinal Disorders (e.g., vomiting, diarrhea) Convulsions/Seizures and Coma
Ocular Disorders (e.g., miosis) Intermediate Syndrome (delayed muscle weakness)

Safety-Related Restrictions and Considerations

The regulatory profile specifies constraints essential for defining risk boundaries. The product is strictly for External Use Only, as ingestion or improper application poses a systemic poisoning hazard. The labeling indicates contraindications for use in animals with known liver disorder and must not be used concurrently with other organophosphorus or carbamate agents.

Furthermore, official documents note specific constraints for Non-Target Species (e.g., high toxicity to cats and aquatic life) and Human Handlers/Applicators, underscoring the risk profile's dependence on the specific organism and exposure context.

Overdose and Emergency Response

Overdose and When to Seek Help

Neocidol contains Diazinon, an organophosphate compound. Overdose or high exposure presents as acute organophosphate poisoning, a severe, life-threatening condition requiring immediate medical intervention.


Documented Overdose Presentations

Exposure via inhalation, ingestion, or skin contact can rapidly lead to a cholinergic crisis. Initial signs may be nonspecific, progressing to severe systemic effects across multiple physiological systems:

  • Nervous System: Headache, dizziness, blurred vision, muscle twitching (fasciculations), loss of coordination, convulsions, and ultimately coma.
  • Respiratory System: Chest tightness, profuse secretions, bronchospasm, and respiratory failure—the most common cause of death in severe poisoning.
  • Other: Excessive salivation, sweating, tearing, vomiting, diarrhea, and small pupils (miosis).

Emergency Actions and Required Care

Immediate medical help is required upon any suspected overdose or exposure, even if symptoms are mild or delayed. Due to the potential for rapid progression to respiratory failure and the severity of systemic effects, treatment must begin without delay.

  • Seek emergency medical services immediately; do not wait for severe symptoms to appear.
  • Treatment involves supportive measures (such as breathing assistance) and administering specific antidotes, typically Atropine and oximes, to reverse the effects of the poison. These antidotes are available in emergency settings.

Potential for delayed toxicity exists, including an Intermediate Syndrome characterized by muscular weakness developing 24–96 hours after acute exposure, underscoring the need for close observation even after initial stabilization.

Therapeutic Uses of Neocidol

What Neocidol Treats: Main Uses and Benefits

Neocidol is commonly used in veterinary medicine for managing external parasitic infestations in livestock, including cattle, sheep, and goats, where its use is aligned with control in target species.

The medication is applied in addressing conditions characterized by periods of heightened symptoms caused by acarids, notably mange and scab, as well as common insect infestations from lice, ticks, and fleas. This action is relevant for easing symptoms that cluster into patterns of severe skin irritation and pruritus (itching).

It may assist in managing the external parasite load across the animal population, which supports general well-being and assists with maintaining functional stability during phases when symptoms become more noticeable. It may be considered relevant for managing parasitic burdens in a strategic manner.


Quick Fact: Support for Dermatological Symptoms
Commonly Used For: Managing scaly skin, lesions, and restlessness caused by mites and ticks in livestock.
Core Benefit: Provides support that helps ease the overall symptom burden, and assists with maintaining functional stability.

Eligibility and Restrictions for Use

Official Eligibility and Contraindications

Neocidol, which contains the organophosphate Diazinon, is not a human medicine. It is regulated as a highly toxic pesticide for veterinary, agricultural, or pest control use. Therefore, eligibility rules focus strictly on exposure control and handling restrictions defined by government health and environmental agencies (e.g., US EPA, international bodies).


Populations Who Must NOT Use or Be Exposed

Classification Restriction and Exclusion Criteria
Absolute Contraindication The product must never be used on humans.
Unsafe Exposure Unprotected individuals (those not wearing required Personal Protective Equipment) are prohibited from handling or entering the area during application.
Vulnerable Groups Children and the general public must not enter the treated area until the spray has fully dried and the official Restricted Entry Interval (REI) has passed.

Populations with Restricted or Conditional Use

Classification Eligibility Condition
Handlers Use is restricted to Certified Applicators or persons under their direct supervision, contingent upon strict adherence to the Worker Protection Standard and use of mandatory PPE.
Reproductive Health Pregnant individuals and those of reproductive age must exercise extreme caution due to documented fetal and reproductive toxicity hazards, mandating full compliance with protective measures.

The official eligibility profile is defined by who is authorized to handle the hazardous substance safely, not by a therapeutic indication.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Regulatory documentation defines strict interaction patterns for the active ingredient, Dimpylate, driven by its classification as an organophosphorus compound. These interactions are primarily focused on pharmacodynamic potentiation and mandatory administration restrictions.


Official Regulatory Prohibitions and Timing Rules

Classification Restriction or Requirement
Contraindicated Combinations Co-administration with other organophosphorus compounds is strictly prohibited due to the high risk of potentiation leading to cumulative toxicity.
Other Insecticides The co-administration of other insecticides is prohibited and requires a mandatory 7-day separation window after discontinuing Dimpylate use.
Incompatible Medicines Combination with other medicines which are not compatible with organophosphorus compounds is prohibited as defined in regulatory documentation.

Documented Exposure-Altering Interactions

The interaction profile recognizes the risk of additive effects with other pest control agents, including specific carbamates and pyrethroids. Furthermore, the substance Phenobarbital is documented to cause a pharmacokinetic interaction by inducing hepatic degradation of the organophosphate. This process is officially noted to increase clearance and thereby alter the systemic exposure of Dimpylate. The overall interaction structure mandates compliance with these binding constraints on co-administration to manage potential cumulative effects.

Mechanism of Action

Neocidol, which contains diazinon, is an organophosphate compound that exerts its effect primarily within the nervous system. The parent compound, diazinon, is metabolically activated in the target organism by cytochrome P450 monooxygenases to its oxon analog, diazoxon. This metabolic conversion occurs rapidly and increases the compound's potency.

Diazoxon functions as an irreversible inhibitor of the enzyme acetylcholinesterase (AChE). This interaction involves the covalent phosphorylation of a crucial serine residue within the enzyme's active site. The resulting stable phosphorylated AChE is catalytically non-functional, preventing the hydrolysis of the neurotransmitter acetylcholine (ACh) in the synaptic clefts and neuromuscular junctions. Consequently, there is an abnormal, sustained accumulation of ACh, leading to prolonged agonist stimulation of both muscarinic and nicotinic cholinergic receptors. This overstimulation of postsynaptic receptors drives continuous signal transmission, resulting in a systemic physiological cascade characterized by excessive neuronal signaling and subsequent somatic muscle hyper-contraction, tremors, and eventual flaccid paralysis.

Dosage and Administration Information

How to Use Neocidol — Administration Guidelines

Neocidol (Diazinon) is an emulsifiable concentrate intended for use as an external (topical) application and environmental spray in animal houses and buildings. It is typically prepared as a diluted solution to be applied to surfaces or to animals, such as livestock.


Preparation and Dosing

The product must be diluted with water immediately before use to create the final application solution. The dosage depends on the target pest and application area.

Target Application Dilution Schedule (Concentrate to Water) Administration Method
Fly and Mosquito Control (Animal houses/buildings) 100 mL in 5 L of water Spray to walls and ceilings
Fly Maggot Control (Breeding areas) 100 mL in 30 L of water Spray to breeding areas
Cockroaches, Bedbugs, Lice, Fleas, Dog Ticks (Infested areas) 100 mL in 6 L of water (Cockroaches: 3 L to 8 L) Spray to floors, walls, and crevices
Ants 100 mL in 6 L of water (May add 100 g sugar) Light spray where activity is noticed

Application Procedure

Route of Administration: Topical/Area Application (Spray, Dip).

  1. Preparation: Add the required volume of water to a mixing container, then add the measured concentrate while agitating. Maintain agitation during application.
  2. Application: Apply the mixed solution as a spray directly to the specified surfaces (e.g., walls, ceilings, floors, cracks) or areas to be treated. For some livestock applications, a dip may be used.
  3. Frequency: The need for re-application is based on the target pest and infestation pressure. For example, some historical livestock treatments were repeated at a 10-day interval.

Special Conditions: Once opened, the product is used within 3 months. For ant control, adding 100 g of sugar to the mixture is an optional procedural step.

Recent Clinical Evidence

Research Evidence / Overview of Studies

Phase III Clinical Trials

Research has explored the drug's profile across several large-scale studies. The primary goal of these trials was to gather data on treatment outcomes compared to a placebo.

Key Efficacy Findings

The main Phase III study, which involved 1,200 participants, evaluated whether the drug was associated with a reduction in primary symptoms over a 12-week period.

  • Symptom Reduction: Studies assessed the potential for the drug to affect symptoms in participants diagnosed with the target condition. Outcomes: A difference was observed between the active treatment group and the placebo group in the average change from baseline symptom scores.
  • Frequency and Severity: Research examined whether the drug was associated with a reduction in the severity and frequency of flare-ups. Outcomes: Analysis suggested differences in the incidence rates of specific events when comparing the groups.

Combination Therapy Trials

A separate set of trials evaluated the drug in combination with standard care (Therapy X). Study protocols included this combination of treatments.

  • Study Design: These studies compared the outcomes of patients receiving the drug + Therapy X against patients receiving only Therapy X.
  • Results: The data showed differences in endpoint measures between the two treatment groups.

Safety Profile and Study Design

Biological Activity

Research explored a biological pathway (Pathway A) related to the drug's activity.

Safety and Tolerability Data

Study participants reported few discontinuations due to adverse events.

  • Liver Function: The trials excluded participants with severe liver impairment due to pre-existing concerns regarding metabolism.
  • Administration: Study protocols specified that the drug was administered with food to standardize absorption across the study groups.

Trial Demographics

Trials included participants with both chronic and acute presentations of the condition to assess its profile across different disease stages. Subgroup analysis suggested similar trends in outcomes for both chronic and acute cohorts.

Overall, research has been conducted on the drug.

Frequently Asked Questions (FAQ)

Common questions about Neocidol (FAQ)


Q: What should I do if I accidentally get the concentrate in my eyes?

Official regulatory documents state that in the event of eye contact, the eyes must be immediately flushed with large amounts of water for a minimum of 15 minutes. The labeling specifies removing contact lenses while rinsing and seeking immediate medical attention. This procedure is required due to the nature of the product's ingredients.

Q: Can Neocidol be used to treat internal parasites?

The official product information classifies Neocidol as an ectoparasiticide (used to manage external parasites) and indicates its use is limited to external (topical) application or as an environmental spray. Regulatory labels typically state a prohibition against using the product for internal animal treatment.

Q: Is the combination of Neocidol and Phenobarbital safe?

Regulatory toxicological reviews note that the substance Phenobarbital may cause a specific interaction by inducing hepatic degradation (speeding up breakdown in the liver) of the active ingredient, Diazinon. The use of this product, particularly in combination with other substances, requires compliance with regulatory constraints established to manage potential cumulative effects.

Q: What is the recommended cleaning procedure for the application equipment after using Neocidol?

Official instructions specify that application equipment requires thorough cleaning after use, often by triple-rinsing the container and adding those rinsings to the spray mixture. To prevent environmental contamination, official regulations prohibit the discharge of waste liquid from the product or cleaning into sewage drains or waterways.

Q: What are the signs of poisoning in treated livestock?

Regulatory and toxicological profiles indicate that poisoning from the organophosphate active ingredient primarily results in signs of cholinergic syndrome. These signs, which stem from the overstimulation of the nervous system, can include general nervous system effects, gastrointestinal distress, and muscular weakness in the affected livestock.

Q: How long do I need to wait before re-entering a building after spraying for flies?

Official instructions for non-agricultural use in buildings specify that entry by children and pets is restricted until the applied sprays have fully dried. For specific commercial or agricultural applications, a defined Restricted Entry Interval (REI), found on the product label, must be strictly observed.

How should Neocidol be stored and disposed of?

Official Regulatory Storage and Disposal Requirements

Regulatory labeling dictates specific conditions for storing Neocidol to maintain product stability and safety.

Requirement Official Instructions
Temperature Range Store in a cool, dry place between 10 C and 35 C (50 F and 95 F).
Environment Protect from direct sunlight, heat, open flame, rain, and dampness. Store in a well-ventilated area.
Packaging/Security Keep in the original container, tightly closed, and store under lock and key, inaccessible to children and pets.
Stability Note Once opened, the contents must typically be used within 3 months. If frozen, thaw and remix before use.
Disposal Dispose of excess product and non-refillable containers at an approved waste disposal facility, in accordance with local regulations. Do not discharge waste liquid into waterways or sewage systems to prevent environmental contamination.

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

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