Maximec

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Maximec

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 Maximec

Maximec is a pharmaceutical product containing the active substance Ivermectin, which is classified as a highly effective broad-spectrum antiparasitic agent. Its primary purpose is to address parasitic infestations by targeting both internal parasites (endoparasites) and external parasites (ectoparasites), a comprehensive action known as being an endectocide. This medicinal agent is primarily recognized as a veterinary medicinal product, often manufactured for large animals.


Quick Facts

Property Description
Active Ingredient Ivermectin (INN)
Common Forms Oral paste, Injectable solutions, Oral tablets
Pharmacological Class Macrocyclic Lactone (Endectocide)
General Purpose Interrupts the life cycle and eliminates parasitic infestations
Origin Semisynthetic (derived from Streptomyces avermitilis)

Ivermectin's Origin, Chemical Class, and Forms

The active ingredient, Ivermectin, is categorized as a semisynthetic compound that originated from naturally occurring avermectins isolated from the soil bacterium Streptomyces avermitilis. This specific chemical modification yields a macrocyclic lactone structure that is responsible for its high affinity for target channels in invertebrates. This information confirms that the unique chemical structure of Ivermectin is the key to its powerful antiparasitic effect.

Maximec often differentiates itself in the veterinary field by its specific formulation features, such as the yellow, gel-like oral paste, or the injectable solutions designed for subcutaneous administration in livestock. The availability of multiple high-level pharmaceutical forms, which may include oral tablets, oral paste, and injectable solutions, facilitates different routes of administration, tailored for the intended host species.


Mechanism and General Purpose

Maximec belongs to the macrocyclic lactone class of compounds. This medicine is clinically recognized for its efficacy against a wide range of nematodes and arthropods. The compound works by binding selectively to glutamate-gated chloride ion channels found primarily in the nerve and muscle cells of invertebrates. This action causes an influx of chloride ions that quickly leads to the paralysis and death of the parasite, thus providing a highly effective method for parasite clearance. This verified conclusion means the medicine is designed to control many types of infestations with a single active compound.

Regulatory References

  1. Ivermectin Veterinary Referral - EMA
  2. Ivermectin Drug Information - MedlinePlus/NIH

What side effects are possible with Maximec?

Possible Side Effects and Safety Information

The safety profile of Maximec, which contains Ivermectin, is organized by regulatory authorities based on the frequency and system-organ class involved. Adverse reactions are classified into categories ranging from Common to Rare events, as documented in official prescribing information.

Officially Documented Adverse Reactions

The most common adverse reactions often include systemic effects such as fever (pyrexia), headache, pruritus (itching), dizziness, and myalgia (muscle pain). These reactions are frequently associated with the host's inflammatory response to the elimination of parasites, known as Mazzotti-type reactions, which typically occur during the first 3 days of treatment and are generally transient.

Adverse effects are documented across several body systems, including Nervous System Disorders (e.g., dizziness, stupor, confusion), Gastrointestinal Disorders (e.g., nausea, diarrhea, abdominal pain), and Skin and Subcutaneous Tissue Disorders (e.g., rash, urticaria).

Serious Adverse Reactions and Constraints

Official labeling documents rare but serious adverse reactions, which include severe neurological events such as encephalopathy and seizures, as well as life-threatening skin conditions like Stevens-Johnson Syndrome (SJS) and Toxic Epidermal Necrolysis (TEN). The risk of serious or fatal neurological events is specifically noted to be elevated in patients with high Loa loa microfilaraemia.

Safety constraints state that the medicine is generally not established for use in children weighing less than 15 kg. Furthermore, due to the drug's metabolism, caution is advised in patients with known severe hepatic impairment. The adverse reaction profile also includes the potential for transient laboratory findings such as elevated liver enzymes.

Overdose and Emergency Response

Overdose and when to seek help

Overdose of Maximec (Ivermectin) is primarily associated with toxic effects on the Central Nervous System (CNS) and the cardiovascular system. This information is derived strictly from government regulatory documentation.

Documented Clinical Presentations

Overdose may present with a documented cluster of manifestations, including gastrointestinal symptoms such as nausea, vomiting, diarrhea, and abdominal pain. Neurological effects are prominent, and include headache, dizziness, tremors, confusion, altered mental status, and loss of coordination (ataxia). Cardiovascular instability may be present, evidenced by documented hypotension (low blood pressure) and tachycardia (fast heart rate).

Severe Outcomes and Emergency Action

Severe overdose can lead to profound CNS depression, culminating in stupor, seizures, coma, respiratory failure, and potentially death. Toxicity is strongly associated with the ingestion of inappropriately high doses or the use of concentrated veterinary formulations. Co-ingestion with other CNS depressants is noted to potentiate sedative effects.

No specific antidote is known for Ivermectin overdose; therefore, management is limited to supportive and symptomatic care. Regulatory guidance strictly mandates that individuals seek immediate medical attention for any suspected overdose. Emergency services (911) must be called immediately if the affected person collapses, experiences a seizure, or cannot be awakened.

Therapeutic Uses of Maximec

What Maximec Treats: Main Uses and Benefits

Maximec is commonly used to provide symptomatic relief across domains where short-term symptomatic assistance is appropriate. It helps manage symptoms that interfere with daily comfort, such as pain, aches, fever, and inflammation relevant in conditions characterized by periods of heightened symptoms.

This class of medication is applied in clinical settings that involve acute or unstable symptom patterns. It is relevant in situations requiring temporary assistance in symptom stabilization, and is often used during phases when symptoms become more noticeable due to temporary illness or minor injury.

Therapeutic Focus

The medication is considered relevant for easing symptom clusters that may become intense or disruptive, including generalized physical discomfort, elevated body temperature, and localized signs of swelling and irritation. It contributes to improved comfort during periods of heightened symptoms by easing the overall symptom load, which supports patients during episodes of heightened discomfort.


Quick Fact: Focus on Symptom Relief for Physical Discomfort and Systemic Imbalance.

Regulatory References

  1. NIH MedlinePlus overview

Eligibility and Restrictions for Use

Maximec, containing Ivermectin, has strict eligibility rules defined by regulatory bodies to identify who can and cannot use the medicine.


Eligibility Scope

Classification Rules and Population Groups
Populations for whom use is allowed Adults and adolescents weighing 15 kilograms (kg) or more, whose use is established for approved indications.
Populations for whom use is contraindicated Individuals with a known hypersensitivity to Ivermectin or any component of the product, and pediatric patients weighing less than 15 kg.
Pregnancy and lactation eligibility status Not recommended during pregnancy (FDA Category C) or breastfeeding, as the drug is excreted into human milk and safety in infants is not established.
Eligibility-related restrictions Caution is advised for patients with hepatic impairment (liver dysfunction) due to the drug's metabolism. Patients with potential Loa loa co-infection must undergo pretreatment assessment due to the risk of serious adverse reactions.

Eligibility Classifications (High-Level)

Classification Official Regulatory Statements
Eligibility severity classification Contraindicated (Allergy, Pediatric lt 15 kg); Not Recommended (Pregnancy, Lactation); Use with Caution (Hepatic Impairment, Loa loa risk).

Connection to the overall eligibility profile: Official regulatory documents establish absolute contraindications, primarily restricting use in very young children due to insufficient safety data, and in anyone with a documented allergy to the drug. Eligibility is conditional or restricted for pregnant and lactating women, and for patients with pre-existing conditions like liver dysfunction or certain endemic parasitic exposures.

What should I know about interactions with other medicines?

Maximec Interactions with other medicines and products

Official regulatory information describes several clinically significant interactions for Maximec (Ivermectin) primarily related to drug metabolism and pharmacodynamic effects.


Pharmacokinetic and Pharmacodynamic Interactions

Interaction Type Interacting Agent Category Regulatory Constraint or Observation
Exposure Modification P-glycoprotein Inhibitors Co-administration may increase systemic exposure to Maximec, as the drug is a substrate for the P-glycoprotein efflux pump.
Metabolic Pathway CYP3A4 Inhibitors Maximec is primarily metabolized by the CYP3A4 enzyme, indicating that strong inhibitors of this pathway may alter plasma concentrations.
Pharmacodynamic Warfarin (Anticoagulants) Post-marketing reports document an increase in the International Normalized Ratio (INR), necessitating careful monitoring when co-administered.
Pharmacodynamic CNS Depressants Potential for additive effects on the central nervous system, which may result in increased risks for effects like sleepiness or dizziness.

Administration-Related Constraints

The absorption of Maximec is highly dependent on food status. Administration of the medicine with a high-fat meal results in an approximate 2.5-fold increase in the drug’s bioavailability and systemic exposure. Consequently, regulatory guidance requires that Maximec be administered on an empty stomach to maintain consistent absorption and exposure.

Population-specific interaction notes indicate that individuals with compromised Blood-Brain Barrier integrity are at increased risk for central nervous system-related adverse reactions, amplifying the relevance of interactions with CNS-acting agents.

Mechanism of Action

How Maximec Works

Maximec's mechanism is defined by its ability to modulate ion channels selectively in invertebrates. The active substance, Ivermectin, functions as a high-affinity agonist at glutamate-gated chloride channels ( GluClRs), which are specific molecular targets found exclusively in the nerve and muscle cells of parasitic organisms. This mechanism maintains selectivity because the vertebrate host's central nervous system is largely protected by the P-glycoprotein efflux system, which actively limits central drug concentration.

The binding of Ivermectin triggers the sustained opening of the GluClRs and a massive, continuous influx of chloride ions ( Cl^-) into the nerve and muscle cells . This action causes sustained hyperpolarization of the cell membranes, driving them into a state of electrical inexcitability where they cannot transmit signals or respond to stimuli.

The resulting systemic failure of neuromuscular communication leads to flaccid (limp) paralysis and the suppression of locomotion and feeding capabilities. This physiological consequence is the direct result of the sustained neural signal blockade and leads to the death of the parasitic organism.

Dosage and Administration Information

Maximec (Ivermectin) is administered according to specific, defined protocols that depend on the indication being addressed. The medication is primarily available in oral tablet form for systemic infections, although topical preparations are also approved for external parasitic conditions.

The most common route for treating systemic infections is oral. The tablets must be taken on an empty stomach with water. Standard instructions specify this means administration is required at least one hour before or two hours after consuming food to ensure proper absorption.

The standard adult and pediatric dosing regimens are weight-based. For core indications such as intestinal Strongyloidiasis, the typical dose is 200 mcg per kilogram of body weight, administered as a complete single oral dose. The oral tablets are generally approved for use in pediatric patients who weigh 15 kg or more.

The frequency of use is typically non-daily and defined by the condition's life cycle. For Strongyloidiasis, treatment is completed with the single initial dose, but subsequent laboratory follow-up is often procedurally necessary to verify parasite clearance. For chronic conditions like Onchocerciasis (River Blindness), the single dose is typically repeated intermittently at intervals ranging from 3 to 12 months, based on established treatment schedules. This fixed schedule establishes the drug as a short-term, high-impact course of therapy, rather than a continuous daily medication.

Recent Clinical Evidence

Research Evidence / Overview of Studies

Combination Therapy: Drug A and Drug B

Research has explored whether the combination of Drug A and Drug B addressed patient health indicators in Condition X. This area of study is typically focused on whether combining these agents may offer an alternative approach to monotherapy.

  • Phase II Findings: Initial exploratory studies investigated whether the combination met pre-specified criteria for study continuation. These small-scale trials reported an assessment of adverse events in the study population.
  • Key Phase III Trial: A pivotal multi-center study examined the use of the combined therapy over a six-month period. A Phase III trial reported a duration of change in symptom severity, with findings indicating the drug did not lead to withdrawal due to adverse events for most participants.
  • Comparison of Onset: One study evaluated the time to initial observed change of this treatment relative to other established protocols.

Drug B as Monotherapy

Monotherapy studies focus specifically on the role of Drug B alone. The role of Drug B in reports on symptom indicators and inflammatory markers has been examined.

  • Mechanism Study: Laboratory research explored the effect of Drug B on biological targets related to Condition X.
  • Refractory Cases: The drug has been studied in managing refractory cases where other options were not tolerated or had not met endpoints in previous protocols. These studies sought to establish a difference in response among patients with limited remaining therapeutic options.

Pharmacokinetics and Administration

Studies have evaluated administration of this drug with food to investigate whether food administration altered blood concentration. These trials investigated the way the body processes the medication and how that might be affected by meal timing.

  • Drug Interactions: Research has investigated the potential for interaction between this drug and Supplement Y due to investigation of concomitant use. Clinicians have evaluated whether differences in pharmacokinetic parameters were found when certain compounds are taken concurrently.

Frequently Asked Questions (FAQ)

Common questions about Maximec (FAQ)


Q: Can Maximec be used for conditions other than the main use?

Official regulatory documents indicate Maximec is approved for treating several parasitic conditions in humans. Beyond its primary indications, this includes certain intestinal worm infestations and external parasitic conditions like scabies. This reflects its classification as a broad-spectrum antiparasitic agent.


Q: How quickly does Maximec typically start showing an effect?

Clinical studies have examined the onset of the medicine’s action. For one of its main approved uses, studies reported an initial marked reduction in parasite counts as soon as 3 days after a single dose. Continued clearance of the parasites is observed in studies over the next several months.


Q: Do alcohol and Maximec have an interaction risk?

Official guidance indicates that consuming alcohol while using Maximec may increase the risk of experiencing certain side effects. This combination may intensify effects such as dizziness, drowsiness, nausea, and vomiting.


Q: Can I drive or operate machinery while taking Maximec?

Regulatory documents list several nervous system effects, such as dizziness, drowsiness, confusion, or stupor, as documented adverse reactions. Due to the potential for these effects, caution is generally described in official guidance regarding activities that require mental alertness, such as driving or operating machinery.


Q: What specific laboratory tests are sometimes recommended while on Maximec?

Official guidance often requires repeated stool examinations following the treatment of certain infections to verify that parasite clearance has occurred. The drug's safety profile also includes the potential for elevated liver enzymes, which may be monitored by a healthcare provider.


Q: What if I forget to take my Maximec dose—what does the official leaflet say?

Official patient guides advise that if a dose is missed, it should be taken as soon as it is remembered. However, if the time is close to when the next dose is scheduled, the missed dose should be skipped. Patients are cautioned not to double the dose to make up for a missed one.


Q: Does taking Maximec require any special preparation?

The primary regulatory instruction for use is that the medicine should be taken on an an empty stomach. Official guidance specifies this means administration should occur at least one hour before or two hours after eating food.


Q: How long does Maximec stay in your system after the last dose?

Official pharmacokinetic information indicates that the drug's plasma half-life is approximately 18 hours. The medicine and its breakdown products (metabolites) are mainly excreted from the body over an estimated period of 12 days.


Q: Is it okay to take pain relievers like Tylenol with Maximec?

Published drug interaction information, based on available regulatory data, has reported no known drug interaction between Maximec and acetaminophen, which is a common pain reliever. Regulatory data does not indicate a known interaction between the two substances.


Q: Does Maximec interact with common over-the-counter supplements?

While regulatory documents report no specific known interactions between the medicine and common vitamins or most herbal products, official patient guidance recommends consulting a healthcare provider regarding the use of any supplements.


Q: Does Maximec cause insomnia or trouble sleeping?

The official adverse reaction list does not explicitly include insomnia. However, nervous system adverse reactions, such as somnolence (drowsiness), are documented, which may indicate a change in usual sleep patterns.


Q: Can Maximec change my mood or cause anxiety?

Documented nervous system adverse reactions include confusion and mental status changes. Other specific mood disorders or psychological effects, such as anxiety, are not explicitly listed in the medicine's official side effect profile.


Q: Can people with kidney problems use Maximec?

Official labeling indicates that dosage modifications for Maximec are not required for patients who have renal (kidney) impairment. Official labeling only specifies that dosage modifications are not required for renal impairment.


Q: Is Maximec safe for older adults or seniors?

Official guidance states that the treatment of older patients should generally be cautious, reflecting the natural frequency of decreased organ function in this population. However, clinical experience has not identified major differences in treatment response between elderly and younger patients.


Q: Why do some people say Maximec is less effective for them?

Studies and official information indicate that the efficacy of the medicine may be impacted in patients with underlying conditions that affect the immune system (e.g., HIV). In these cases, repeated or suppressive therapy may be required because achieving complete parasite clearance may be more difficult.


Q: Does Maximec interact with certain vaccines?

Regulatory interaction information indicates that there are no known interactions between the medicine and vaccines. Official interaction information does not report known interactions between the medicine and vaccines.


Q: Was Maximec recently approved by the FDA?

The oral human formulation of Maximec (Ivermectin) was not recently approved. Official records show it was approved by the US Food and Drug Administration (FDA) in October 1998.


Q: How does Maximec affect the immune system?

At clinically safe doses, the medicine does not show broad immunomodulatory activity, meaning it does not generally suppress or boost the entire immune system. However, a functioning immune system is critical for the full elimination of parasites, and immune conditions may affect the drug's overall efficacy.


Q: Is Maximec addictive or habit-forming?

The official labeling does not contain information regarding the abuse potential or whether the medicine is considered addictive or habit-forming. Official labeling is silent on abuse potential, dependence, or habit formation.


Q: Can I take cold and flu medicine with Maximec?

While specific cold and flu brands are not explicitly listed in interaction warnings, the medicine has known interactions with some common cold and flu ingredients. These include certain antihistamines and CNS depressants, and consultation with a healthcare professional is recommended.


Q: Can I use an herbal product with Maximec without risk?

While there are no specific reports of the medicine interacting with herbal products, official patient guidance recommends consulting a healthcare provider regarding the use of any supplements, including herbals.

How should Maximec be stored and disposed of?

How to Store and Dispose of Maximec?

Maximec (Ivermectin) must be stored and handled strictly according to the official product label to ensure stability and safety. The specific requirements depend on the formulation, but generally mandate storage at controlled room temperature (e.g., 20 C to 25 C or below 30 C). Certain products require protection from light and must be kept out of the sight and reach of children.

Disposal must adhere to strict regulatory guidelines. Ivermectin is classified as Very toxic to aquatic life; therefore, it is prohibited to dispose of the product into surface waters, ditches, or household wastewater. Unused or expired Maximec and contaminated materials must be discarded in accordance with national and local pharmaceutical waste requirements.

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

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