Avimec

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Avimec

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 Avimec

Quick Facts

Property Description
Active Ingredient Ivermectin
Pharmacological Class Macrocyclic Lactone (Avermectin class)
Type Endectocide
Common Use (General) Systemic control of internal and external parasites in veterinary medicine
Origin Semi-synthetic derivative of a fermentation product

What is Avimec and Its Primary Classification?

Avimec is a pharmaceutical preparation widely recognized in veterinary medicine for the systemic control of parasitic diseases in livestock. The medication's active ingredient is Ivermectin (INN), which belongs to the potent Macrocyclic Lactone family, specifically the avermectins, and is categorized as an endectocide due to its efficacy against both internal parasites (helminths) and external parasites (arthropods).

The drug entity is designed to provide broad-spectrum relief from various parasitic infections simultaneously. This broad-spectrum efficacy of Ivermectin is recognized for its action against multiple classes of parasites.

The Composition and Origin of Ivermectin

Ivermectin is a semi-synthetic compound that distinguishes itself by its unique origin, having been originally derived from the fermentation products of the soil bacterium Streptomyces avermitilis. This natural base, combined with subsequent chemical modification, results in an effective antiparasitic substance. The final active substance is a specific mixture primarily consisting of two closely related homologs: 22,23-dihydroavermectin B1a and B1b.

Avimec is typically manufactured as an oral liquid solution (drench) or an injectable solution, a form that facilitates rapid and accurate administration necessary for controlling herd outbreaks. The importance of Ivermectin across various health applications is well-established, reflecting its consistent chemical properties.

What is Avimec's General Purpose?

The primary general purpose of Avimec is the effective control and elimination of parasitic infestations by targeting the nerve and muscle systems of the organisms. The drug's endectocidal action enables it to address both internal parasites, such as gastrointestinal worms, and external threats, such as mites and lice, in a single treatment. The medicine achieves this through a mechanism of targeted nerve paralysis, serving the general therapeutic goal of reducing the parasitic load in affected hosts.

Regulatory References

  1. Ivermectin - DrugBank (NIH)

What side effects are possible with Avimec?

Possible side effects and safety information

The safety profile of Ivermectin, the active ingredient in Avimec, is defined by its potential for dose-dependent Central Nervous System (CNS) toxicity in non-target and genetically susceptible animals, as documented by veterinary regulatory authorities.

Officially Documented Adverse Reactions

Adverse reactions observed in animals are primarily associated with high doses or genetic factors and are categorized by the systems they affect:

  • Nervous System Disorders: Symptoms may include ataxia (incoordination), tremors, disorientation, and general CNS depression.
  • Gastrointestinal Disorders: Documented effects include vomiting, diarrhea, and hypersalivation (excessive drooling).
  • Serious Adverse Reactions: Severe outcomes associated with toxicosis can rapidly progress to seizures, coma, and respiratory collapse.

Population-Specific Safety and Restrictions

Safety constraints and population-specific considerations are crucial aspects of the official safety profile:

Safety Element Regulatory Statement
Genetic Susceptibility Animals with the MDR1 gene mutation (e.g., Collies and related breeds) are highly susceptible to severe neurological toxicity.
Age Restriction Not recommended for use in animals under 6 weeks of age.
Time-Related Pattern Clinical signs of toxicity typically develop within a few hours but may be delayed up to 24 hours post-exposure.
Contraindication Documented hypersensitivity to Ivermectin or any of the formulation's excipients.

The official safety documentation establishes that genetic susceptibility is a key determinant of the drug's safety risk, which fundamentally structures the understanding of potential adverse events in veterinary practice. The safety information also formally notes the risk of severe toxicosis when administered at high doses concurrently with certain other compounds.

Overdose and Emergency Response

Overdose and When to Seek Help

This section outlines the officially documented clinical signs, severe outcomes, and mandated emergency actions associated with an overdose of the active ingredient in Avimec (Ivermectin), as stated in regulatory and public health advisories.

Category Official Regulatory Statements
Documented Overdose Presentations Nausea, vomiting, diarrhea, abdominal pain, low blood pressure (hypotension), fast heart rate (tachycardia), dizziness, confusion, tremors, loss of coordination (ataxia), and visual hallucinations.
Physiological Systems Affected Central Nervous System, Cardiovascular System, Gastrointestinal System.
Population-Specific Overdose Notes Individuals with specific P-glycoprotein transporter gene mutations may exhibit increased susceptibility to neurotoxicity.
When Immediate Medical Help is Required Seek immediate medical attention or call emergency services (911) for any severe symptoms, including altered mental status, decreased consciousness, seizures, coma, or signs of cardiovascular collapse.

Regulatory Guidance

The severity classification includes life-threatening outcomes such as respiratory failure and death in association with severe toxicity. Regulatory guidance confirms that no specific antidote is known for this overdose. Therefore, management is defined as symptomatic and supportive, including the potential use of activated charcoal in appropriate settings and hospital monitoring. Specific signs, such as hypotension and seizures, must be managed through targeted procedural interventions.

Therapeutic Uses of Avimec

What Avimec Treats: Main Uses and Benefits

The primary purpose of this veterinary product relates to the management of external parasites in compatible avian species. It is commonly used to help manage symptoms associated with Scaly Face Mite (Knemidocoptes pilae) and Scaly Leg Mite infestations. It may be relevant for easing symptoms linked to Air Sac Mite infestations. These are conditions presenting with systemic or localized discomfort, often marked by crusty, scaling lesions or signs of respiratory strain.

The therapeutic domain of antiparasitic action is commonly used in clinical settings that involve acute or unstable symptom patterns. This provides support that helps ease the overall symptom burden and contributes to improved comfort during periods of heightened symptoms. Managing the condition early supports the maintenance of functional stability, particularly related to the bird's feeding and mobility.

“This product is commonly used in scenarios where supportive symptom management is appropriate for easing distress.” The therapeutic domain of antiparasitic action is aligned with domains involving significant symptom expression when addressing specific pest organisms.


Quick Fact: Supports relief for Crusting and Respiratory Strain

Eligibility and Restrictions for Use

The official regulatory documentation for the product Avimec, which contains the active ingredient abamectin, defines strict eligibility constraints based on its classification. Abamectin is regulated by authorities such as the U.S. Environmental Protection Agency (EPA) as a pesticide (an insecticide/miticide), not a drug for human therapeutic use.

Official Eligibility Status

Classification Status in Official Labeling
Human Medicinal Use Not Authorized / Not Approved
Agricultural/Veterinary Use Allowed (restricted to specific labeled crops, pests, or animals)

Populations That Cannot Use This Product

Humans are explicitly ineligible to use the product formulated as Avimec for the treatment of any medical condition. This is because the product is not approved by the U.S. Food and Drug Administration (FDA) or other major medicinal agencies for human consumption or application. The regulatory context establishes that using the product in a manner inconsistent with its non-human labeling is a violation of federal law.

  • Contraindicated Populations: All human populations are contraindic­ated from medicinal use of this non-drug product. Safety documentation highlights the active ingredient's high acute toxicity by oral and inhalation routes.
  • Pregnancy and Lactation: Although not a human medicine, the active ingredient is noted in official safety literature as suspected of damaging fertility or the unborn child, which serves as an absolute exclusion for use or direct exposure in these populations.

What should I know about interactions with other medicines?

Interactions with other medicines and products

The interaction profile for Ivermectin (the active ingredient in Avimec) is defined by pharmacokinetic and pharmacodynamic patterns strictly documented in regulatory labeling. Co-administration of the medicine with certain products may alter the drug’s exposure or result in specific physiological outcomes, necessitating mandatory separation rules.


Drug-Drug and Metabolic Interactions

The drug is metabolized, in part, via the CYP3A4 enzyme. Co-administration with potent CYP3A4 inhibitors may lead to a significant increase in plasma exposure due to decreased clearance. A specific pharmacodynamic interaction has been noted in post-marketing reports: co-administration with the anticoagulant warfarin has rarely resulted in an increased International Normalized Ratio (INR).


Food and Administration Constraints

Oral administration involves a key interaction with food. Administration of the tablets alongside a high-fat meal results in an approximate 2.5-fold increase in bioavailability, modifying the systemic exposure. Because of this interaction, the official label mandates that the tablets be taken on an empty stomach with water as a required administration condition.


Population-Specific Risk

The product label notes population-specific risks related to the drug's action and patient status. There is an increased risk of neurotoxic effects in patients with genetically reduced P-glycoprotein (P-gp) activity. Additionally, patients with heavy Loa loa co-infection face a potential risk of encephalopathy following treatment.

Mechanism of Action

Avimec (Ivermectin) is a macrocyclic lactone derivative that modulates specific neurotransmission pathways, acting primarily in invertebrates. Its mechanism involves two coordinated mechanistic domains.

Modulation of Glutamate-Gated Chloride Channels

Avimec acts as an agonist at glutamate-gated chloride ( Cl^-) ion channels ( GluCls), which are found in the nerve and muscle cells of susceptible organisms. This interaction involves high-affinity binding to allosteric sites on the GluCl receptor, distinct from the glutamate binding site. This molecular step causes a sustained increase in the postsynaptic membrane's permeability to Cl^- ions. The resulting influx of negatively charged ions induces persistent cellular hyperpolarization.


Disruption of Neurotransmission and Muscular Function

This prolonged hyperpolarization inhibits electrical nerve transmission across the affected tissue. This reduction in neuronal excitability and the sustained inhibitory input to muscle cells lead to a functional cessation of activity, inducing generalized muscular paralysis. The most critical systemic physiological consequence is the functional failure of the pharyngeal pump, disrupting feeding and motility in the target organism.

Dosage and Administration Information

Administration Guidelines for Avimec Topical Solution

Avimec (Ivermectin 1000mu g/mL) is supplied as a drop-on liquid and is strictly intended for topical, external use only. The standard administration method involves placing the drops onto an unfeathered area of skin, such as the back of the neck or the thigh, to facilitate proper absorption of the active constituent.

Dosing and Scheduling

Administration is determined by the animal’s body weight category, which acts as the primary dose adjustment factor. For smaller avian species, the regimen is as follows:

Body Weight Category Standard Dose Frequency
Birds less than 30 g 1 drop Once weekly
Birds between 30-100 g 2 drops Once weekly

This application is repeated once per week for a total course of three doses. This fixed, three-week cyclic regimen governs the administration period. A separate weight-based regimen of 0.5 mL per kg of body weight is specified for chickens.

Procedural and Use Constraints

The procedure involves applying the solution to an unfeathered area of skin. It is specified that all birds in a shared aviary or flock must be treated simultaneously. Furthermore, use characteristics emphasize that the solution is not for use in drinking water due to the rapid breakdown of Ivermectin in aqueous dilution. However, the product is indicated for use in conjunction with food additives and other oral medications. Following the full three-week administration course, the total period until affected tissue recovery may take up to six weeks.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Avimec

The research evidence for Avimec, which contains the active ingredient ivermectin, primarily focuses on describing the research scope for use in external parasitic conditions in specific avian populations. This evidence base consists mostly of small-scale clinical studies and field trials conducted under veterinary supervision.


Evidence for Use in Scaly Face Mite Infestation (Knemidocoptes pilae)

Research on this indication generally took the form of Dose Titration Studies and Clinical Field Trials, where naturally infested populations was evaluated in settings with fluctuating or unstable symptoms. The specific population most frequently studied was observed in budgerigars (Melopsittacus undulatus).

Study findings describe patterns observed in the studies where the active ingredient was associated with a transition to an undetectable mite status in the tested populations within approximately two weeks of administration. Researchers also described patterns showing the evolution of symptoms in the observed populations, noting that while the mite population may transition to an undetectable status rapidly, the healing of existing lesions often requires an intermediate period of several weeks for skin changes to stabilize.


Evidence for General Antiparasitic Action (Endectocidal Classification)

Ivermectin was studied for its classification as an endectocide—a substance evaluated in the context of activity against both internal (nematodes) and external (arthropod) parasites. This classification is supported by extensive Pharmacological Reviews and clinical trials was observed in a wide variety of non-avian veterinary hosts (e.g., cattle, sheep, dogs). These studies research examined the spectrum of activity across multiple parasitic groups and patterns related to changes in parasite count.

However, the evidence base for Avimec’s effectiveness against all potential avian parasites, such as Air Sac Mite or specific helminth infections, may rely on extrapolation from this general Ivermectin pharmacology. Specific, controlled trials focusing on episodes where symptoms become more noticeable for every possible parasite in avian species data are still emerging or remain limited.


What is Still Uncertain About the Research Base for Avimec

Long-term effects are not fully established, and data for certain groups remain insufficient. The available research base presents certain limitations: sample sizes were modest in many of the key study reports, and comparative evidence is lacking against the full range of alternative therapies. Consequently, results apply only to the populations studied—primarily budgerigars—and extrapolation to other birds may not fully reflect outcomes.

Frequently Asked Questions (FAQ)

Common questions about Avimec (FAQ)

Q: What is the difference between Avimec for humans and similar medicines for animals?

A: Regulatory information states that the Avimec product is intended only for animals and is not an approved medication for human use. Approved human Ivermectin products, such as oral tablets, are approved by the FDA for specific parasitic diseases, and contain different concentrations and inactive ingredients tested for human safety.

Q: Can Avimec affect liver enzyme levels, according to medical reports?

A: Official reports for the human drug show that elevations in liver enzymes (ALT and/or AST) have been seen in clinical trials. Although the significance is not always clear, liver injury (hepatitis) has also been reported in rare cases following the drug’s use.

Q: Are there known interactions with herbal supplements or vitamins?

A: Regulatory information indicates the active ingredient is metabolized by specific enzymes, and interactions are possible. Therefore, patients are generally advised to inform a healthcare provider about all prescription, nonprescription medications, vitamins, nutritional supplements, and herbal products.

Q: How soon should I notice a difference?

A: Studies on approved uses indicate that the drug provides a sustained effect rather than an immediate change. For example, clinical studies for Onchocerciasis (River Blindness) showed the maximum reduction in microfilariae counts three months after a single dose. Symptom improvement may vary from this timeline.

Q: Are there any food-related requirements for taking Avimec?

A: The human oral tablet form of the active ingredient is described as being taken on an empty stomach with water. This is a condition required in the drug's official labeling to ensure the drug's absorption into the body is managed correctly.

Q: Is dizziness a frequently reported side effect of taking Avimec?

A: Yes, dizziness is listed as a common adverse reaction in clinical trials for the human oral tablet form of the active ingredient. Other related side effects reported include somnolence (drowsiness) and a change in consciousness.

Q: Why does Avimec cause itching or a rash in some people?

A: Itching (pruritus) and rash are frequently reported as part of the Mazzotti reaction. This is a known, temporary immune response that is described as occurring when the active ingredient rapidly begins to kill certain parasitic microfilariae in the body.

Q: What is the 'Mazzotti reaction' and how is it related to Avimec?

A: The Mazzotti reaction refers to a range of cutaneous (skin) and systemic reactions, such as fever, joint pain, and swelling, which may occur when the active ingredient is used to treat Onchocerciasis (River Blindness). The reaction is described as being caused by the body's inflammatory response to the death of the microfilariae.

Q: Are the severe skin reactions common?

A: Severe skin reactions, such as blistering skin lesions and severe rash requiring hospitalization, have been reported in post-marketing surveillance. However, official reports classify these as generally rare adverse events and are often linked to specific co-infections or misuse.

Q: Is it normal to experience stomach discomfort like nausea or diarrhea after a dose?

A: Yes, the human oral tablet form of the drug has been associated with gastrointestinal discomfort. Nausea and diarrhea are officially reported adverse reactions in clinical trials.

Q: Can Avimec be taken with over-the-counter pain relievers?

A: Regulatory bodies advise informing a healthcare provider of all nonprescription medicines, including OTC pain relievers. The possibility of interactions exists, and informing a professional is advised to manage the risk of potential interactions.

Q: Is there an interaction described between Avimec and alcohol consumption?

A: Official information describes potential risks when the active ingredient is used with alcohol. Co-administration may worsen common side effects such as dizziness, weakness, nausea, and vomiting.

Q: What is the standard guidance about using Avimec during pregnancy?

A: The human oral drug is generally considered contraindicated during pregnancy because safety has not been established in pregnant women. Use during pregnancy is generally considered contraindicated, and official documentation describes limited safety data.

Q: Are there specific weight limits or age restrictions for children using Avimec?

A: For the human oral tablet form, safety and effectiveness have not been established in pediatric patients weighing less than 15 kg. For the topical lotion, it is not recommended for children under 6 months of age.

Q: What information is available regarding Avimec use while breastfeeding?

A: Regulatory information indicates that the active ingredient is excreted into human milk in low concentrations. Treatment should be undertaken only when the potential benefit is assessed to outweigh the possible risk to the newborn.

Q: Does having a weakened immune system affect how Avimec works?

A: Studies and regulatory-cited information note that in patients with conditions that weaken the immune system (such as HIV), the drug may not work as effectively. Official reports indicate that additional doses may be required in these situations.

Q: Why is follow-up testing sometimes needed after taking Avimec?

A: Follow-up testing is necessary to ensure the parasitic infection has been completely eradicated. For example, the official protocol for Strongyloidiasis involves follow-up stool examinations at least three times over the first three months after treatment.

Q: What is the safety profile of Avimec according to long-term use data?

A: Long-term safety data for the active ingredient is generally limited. However, for chronic conditions like Onchocerciasis, the drug has a history of controlled, spaced retreatment, with repeat doses commonly administered at intervals of three to twelve months.

Q: Are there any reports of Avimec affecting alertness or concentration?

A: Yes, the human drug's official label includes neurologic adverse events related to alertness and concentration. These include dizziness, confusion, disorientation, and somnolence (drowsiness).

Q: Is Avimec a prescription-only medicine?

A: The FDA-approved human oral tablet form of the active ingredient is generally classified as a prescription-only drug. However, recent state-level laws have allowed it to be dispensed by pharmacists without a physician's prescription in some areas.

Q: What is the general level of safety noted for Avimec in official reports?

A: The FDA states that the drug's safety and effectiveness have been established for its approved uses and doses. Official warnings highlight risks of serious side effects, including severe neurologic events (such as seizures and coma), liver injury, and severe skin reactions in cases of misuse or high doses.

Q: Why do official sources issue warnings about taking Avimec with certain heart medications?

A: Warnings are issued because the active ingredient has been rarely reported to increase the International Normalized Ratio (INR) when co-administered with warfarin. Warfarin is a blood thinner often used to prevent heart-related blood clots, and an increased INR can raise the risk of bleeding.

Q: Do studies exist regarding Avimec's use in the elderly population?

A: Regulatory-cited information suggests that appropriate studies have not demonstrated problems specific to the elderly. However, caution is advised during treatment due to the greater likelihood of age-related declines in liver, kidney, or heart function, which can affect drug processing.

How should Avimec be stored and disposed of?

Official Storage Requirements

Official regulatory information requires that this product be stored below 25 C (77 F) and protected from light to maintain stability. The container must be kept tightly closed when not in use and stored locked up, out of the sight and reach of children. It is mandatory not to freeze the liquid solution, as low temperatures may cause temporary physical changes that reverse upon warming.

Stability and Disposal Mandates

For certain liquid formulations, the product has a limited in-use shelf-life of 28 days after the container is first opened. Disposal of unused or expired product must be done strictly according to local authority regulations. Due to the environmental risk to aquatic life, disposal must ensure the product does not contaminate water or enter watercourses.

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

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