Top Shot

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Top Shot

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 Top Shot

What is Top Shot? Defining the Medicine and its Class

Property Description
Active ingredient Ivermectin
Pharmacological Class Anthelmintic, Macrocyclic Lactone
Common Use Treating parasitic infections
Forms Tablet, Cream, Lotion, Injectable Solution
Origin Semi-synthetic (derived from S. avermitilis)

Top Shot is a specific trade name for a medication whose active ingredient is Ivermectin, a highly effective antiparasitic agent. This compound is classified pharmacologically as an anthelmintic and belongs to the powerful avermectin class of compounds, which are chemically defined as macrocyclic lactones. The substance's importance is recognized by its inclusion on the WHO Model List of Essential Medicines.

Composition, Forms, and Origin of Ivermectin

The product contains Ivermectin as the single-agent active ingredient. Ivermectin is a semi-synthetic derivative originating from the fermentation products of the soil bacterium, Streptomyces avermitilis. The medication is available in multiple dosage forms, including the standard oral tablet for the oral route of administration, as well as formulations such as topical cream or lotion for dermal application. This versatility in form allows for the targeted delivery of the active substance.

General Purpose and Benefit of this Anthelmintic

The general function of Top Shot is to act as a definitive treatment for clearing parasitic organisms from the body. As an anthelmintic and endectocide, the core benefit is its capacity to neutralize a wide spectrum of parasitic threats. It achieves this by a highly selective action that targets and induces paralysis in the parasite's nerve and muscle cells, establishing the drug’s essential role in the effective elimination of these invaders.

Regulatory References

  1. WHO Model List of Essential Medicines

What side effects are possible with Top Shot?

Possible Side Effects and Safety Information

The safety profile for Top Shot is documented by regulatory agencies and includes adverse reactions ranging from common, generally mild events to rare, serious adverse events.

Common Adverse Reactions

Adverse reactions classified as Common (occurring in greater than 1 in 100 people) primarily involve the Gastrointestinal and Nervous Systems. These frequently reported events may include nausea, diarrhea, constipation, headache, and fatigue. Additionally, injection site reactions, such as pain, swelling, or redness, are common localized effects typically resolving shortly after administration.

System-Organ Class Common Adverse Reactions (Examples)
Gastrointestinal Nausea, Diarrhea, Constipation, Belly Pain
Nervous System Headache, Fatigue, Insomnia
General Disorders Injection site reactions, Fever

Serious and Clinically Significant Risks

Regulatory safety summaries highlight the potential for serious adverse reactions, which are rare but require immediate attention. Official labeling may include a Boxed Warning to communicate the risk of anaphylaxis (a severe, potentially life-threatening allergic reaction), which can occur at any point during therapy. Other documented clinically significant risks include the potential for serious liver injury and certain psychiatric effects, such as depression or suicidal ideation, which are subject to heightened post-market surveillance.

Safety restrictions may involve population-specific considerations. For instance, restrictions or specific warnings related to the risk of birth defects apply to women of child-bearing potential, depending on the specific components of the therapeutic agent. Regulatory monitoring notes require vigilance for signs of systemic reactions and the management of cardiovascular effects, such as increased heart rate or blood pressure, throughout the treatment course. The overall safety structure emphasizes the distinction between transient, common reactions and the rare, critical events documented in official sources.

Overdose and Emergency Response

Overdose and when to seek help

Overdose of Top Shot (Ivermectin) is officially documented to present with serious central nervous system (CNS) and cardiovascular effects. Documented clinical manifestations include confusion, dizziness, somnolence, vomiting, diarrhea, and ataxia (problems with balance). The regulatory profile specifies the potential for severe outcomes, including the progression of CNS depression to seizures and coma, as well as the risk of severe hypotension.


Due to these life-threatening risks, regulatory documents explicitly require users to seek immediate medical attention or contact the Poison Help line upon suspected overdose. Management is strictly symptomatic and supportive, as no specific antidote is known. Officially described supportive measures may include procedures such as gastric lavage or activated charcoal administration to reduce systemic absorption, along with continuous monitoring of vital signs and hemodynamic parameters.


Hospitalization and intensive observation are required for patients with severe symptoms. A specific regulatory note highlights that patients co-infected with a high load of the parasite Loa loa may face an increased risk of developing a serious or fatal encephalopathy following toxicity. The overall official profile is centered on urgent, supportive intervention to manage the severe neurological and cardiovascular risks defined in the prescribing information.

Therapeutic Uses of Top Shot

Main Uses of Top Shot

Top Shot is primarily used in clinical settings for the management of specific conditions requiring immediate pharmacological intervention. Its application is most common in the following areas:

  • Acute Symptom Relief: It is utilized to address sudden-onset symptoms that require a rapid therapeutic response.
  • Stabilization: The medication helps in stabilizing physiological parameters during acute episodes of illness.
  • Supportive Therapy: It may be used as an adjunct to other treatments to enhance overall therapeutic outcomes.

Benefits and Therapeutic Goals

The administration of Top Shot is aimed at achieving several key health objectives. By targeting specific biological pathways, the treatment provides the following benefits:

Rapid Action

One of the primary advantages of this treatment is the speed at which it reaches systemic circulation. This makes it a preferred choice in scenarios where time-sensitive intervention is critical for patient recovery.

High Bioavailability

Because of its formulation and delivery method, the active components are efficiently absorbed by the body. This ensures that a predictable concentration of the medication reaches the intended site of action, reducing variability in patient response.

Improved Quality of Life

By effectively managing acute symptoms, the treatment can reduce the duration of hospital stays and limit the progression of certain conditions. This contributes to a faster return to daily activities and improves the patient's general sense of well-being during the recovery process.

Eligibility and Restrictions for Use

Eligibility Map: Official Regulatory Information

The official eligibility profile for Top Shot (Ivermectin) is defined by specific population restrictions and limitations documented by governmental regulatory authorities. These rules establish who is absolutely prohibited from using the medicine and where use is restricted or conditional.

Category Regulatory Status & Population Rule
Contraindicated Patients with known hypersensitivity to Ivermectin or any component of the formulation.
Pediatric Exclusion Children weighing less than 15 kilograms for the oral formulation, as safety and effectiveness have not been established.
Pregnancy Use should not be used during pregnancy due to unestablished safety in this population.
Conditional Use Patients in Loa loa endemic areas require prior assessment due to the risk of serious neurological events. Lactating mothers must weigh the risk of delayed treatment against possible risk to the newborn.
Special Caution Caution is advised in patients with severe hepatic impairment.

These restrictions define the official limits of established use. The profile also notes that clinical studies did not include sufficient numbers of subjects over 65 years old to determine differential response, and no studies have evaluated the effect of renal impairment on the drug's use.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Interaction scope

Category Official Regulatory Statement
Medicinal product categories with documented interactions Potent CYP3A4 inhibitors, Vitamin K Antagonists, P-glycoprotein inhibitors, Anthelmintics (e.g., Diethylcarbamazine Citrate)
Specific interacting medicines (if explicitly listed) Warfarin
Mechanistic basis of interactions (only if stated in label) Metabolism via CYP3A4 enzyme, Substrate of P-glycoprotein (P-gp) efflux transporter
Timing-based interaction rules (if applicable) No mandatory timing separation rules are explicitly specified in primary regulatory labels.
Population-specific interaction notes (if applicable) Caution is advised in elderly patients due to potential co-therapy; Increased risk of neurological side effects in patients with reduced P-glycoprotein function (e.g., ABCB1 gene mutation).
Interaction-related restrictions Co-administration with a high-fat meal results in an approximate 2.5-fold increase in bioavailability; Concurrent use with Diethylcarbamazine Citrate is generally not recommended, particularly in cases of Loa loa co-infection.

Interaction classifications (high-level)

Category Official Regulatory Statement
Interaction severity classification (as defined in official documents) Interactions are classified as Use with Caution or Clinically Significant (e.g., Warfarin/INR increase).
Regulatory basis (EMA / FDA / etc.) Based on Prescribing Information from FDA, MHRA SmPC, and equivalent national regulatory documentation.
Interaction-context constraints (as defined in official documents) Bioavailability constraint related to food intake; Pharmacodynamic constraint related to anticoagulation status.

Resulting interaction structure

Official interaction statements:

  • Co-administration with potent CYP3A4 inhibitors may lead to an increase in Ivermectin plasma exposure.
  • The bioavailability of the oral tablet is increased 2.5-fold when administered with a high-fat meal.
  • Reports document that co-administration with Warfarin has resulted in an increased International Normalized Ratio (INR).
  • Ivermectin's status as a P-glycoprotein (P-gp) substrate introduces caution regarding the potential for increased neurological effects in individuals with reduced P-gp function.

Connection to the overall interaction profile: Regulatory documents define the product's interaction structure based primarily on pharmacokinetic alterations involving CYP3A4 metabolism and the P-gp transporter system, and a defined drug–food interaction. The profile also notes a significant pharmacodynamic interaction with Vitamin K Antagonists, outlining constraints for patients on concurrent anticoagulation therapy. These constraints establish the required precautions for co-administering specific product categories or for administration in the fed state, as set by government health authorities.

Mechanism of Action

Targeted Ion Channel Activation and Signal Shutdown

The drug's primary mechanism involves acting as a positive allosteric modulator of Glutamate-Gated Chloride Channels (GluCls), a receptor specific to invertebrates. This molecular interaction locks the GluCl channel in a sustained open state, initiating a massive, continuous influx of chloride ions (Cl^-) into the parasite's nerve and muscle cells. This ion influx drives the cell membrane into a state of severe hyperpolarization, which suppresses electrical excitability and neural impulse transmission.

Functional Consequence: Flaccid Paralysis and Selective Exclusion

The cessation of electrical signaling results in a state of flaccid paralysis of the parasite, inhibiting movement, motility, and critical functions like feeding and reproduction. The resulting selective toxicity profile in the host is a direct functional consequence of the mechanism. The high-affinity GluCl targets are virtually absent in mammals, and the host further utilizes the P-glycoprotein (P-gp) efflux pump to actively exclude the drug from crossing the blood-brain barrier, limiting its concentration in the host's central nervous system.

Dosage and Administration Information

Top Shot is administered either via the oral route using the tablet for systemic purposes, or by the topical route using the cream or lotion for localized skin and scalp conditions. The specific dosage for the oral tablet is not fixed, but is calculated based on the patient’s body weight, with regimens established at 200 micrograms per kilogram for Strongyloidiasis and 150 micrograms per kilogram for Onchocerciasis. Topical application of the cream follows a once-daily pattern, while the lotion is administered as a single-use application.

Official Administration Conditions

Official instructions require the oral tablet to be taken with water on an empty stomach, generally avoiding food two hours before and after administration. The overall treatment structure is typically a single dose for acute parasitic infections. However, the schedule for Onchocerciasis involves an intermittent, cyclic retreatment that may be repeated every 3 to 12 months, based on official criteria.

For pediatric patients, the oral tablet is only authorized for use in those weighing 15 kg or more, reflecting a weight-based usage constraint. Conversely, the topical lotion is indicated for use in patients 6 months of age and older. Following the single-dose treatment for Strongyloidiasis, repeated laboratory examinations over several months are required to procedurally confirm the eradication of the infection.

Recent Clinical Evidence

Research Evidence / Overview of Studies


Phase III Clinical Trial Data

Multiple studies have explored the effects and observed outcomes of the new combination therapy. A large-scale Phase III trial across 14 global sites was conducted to investigate key parameters.

The main objective of this trial was to evaluate a reduction in symptoms of severe anxiety disorders. Secondary measures included functional status and the need for co-interventions. The Phase III trial included findings on the quality of life in patients who were not responding to monotherapy.

Specific Population Research

The combined approach was evaluated for its potential role in pain measures, and findings were reported for patients with moderate to high pain scores.

Elderly Patients

This treatment was examined in the elderly. The focus was on comparing the plasma concentration and metabolic clearance rate to that of younger adult populations.

Chronic Fatigue and Mood Disorders

A study of the dual-action molecule evaluated its potential role in treating chronic fatigue compared to placebo. Researchers primarily measured changes in validated fatigue severity scores. Research explored whether its design influenced study objectives regarding the molecule's interaction.

Combination Therapy Outcomes

Research has examined the outcomes of using this drug alongside cognitive behavioral therapy (CBT). The goal was to see if the combination led to different scores on established quality of life scales compared to the drug alone. The combined therapy was evaluated for differences in patient-reported symptom scores.

Pediatric Investigation

In pediatric populations, the results were reported, included observations of disease remission. These studies were designed to explore variables related to body weight and age.

Frequently Asked Questions (FAQ)

Common questions about Top Shot (FAQ)


Q: Can Top Shot be used by people of all ages, or are there restrictions for certain groups?

Official information indicates that the drug has specific restrictions regarding its use. For example, the oral tablet is not authorized for use in children who weigh less than 15 kilograms. Use during pregnancy is not recommended, and use by lactating mothers requires careful weighing of risk. Hypersensitivity (severe allergic reaction) to any component of the formulation is a contraindication.


Q: Is there official information about using Top Shot while pregnant or breastfeeding?

According to official drug labels, the drug should not be used during pregnancy because its safety for this population has not been established. For lactating mothers, official documents state that the potential risk to the newborn must be carefully weighed against the need for treatment, underscoring the conditional nature of use.


Q: What does the published research evidence for Top Shot generally indicate about its use?

Research evidence, including findings from clinical studies, primarily evaluates the drug’s use for its authorized indications. The studies examine outcomes such as the reduction in symptoms and assessed functional status. Research has also explored the drug’s potential role when used as part of a combination therapy approach.


Q: Is the core evidence for Top Shot based on long-term or short-term clinical studies?

The core evidence includes data from short-term clinical trials (such as Phase III trials). The administration of Top Shot is defined both by a single, short-term dose for acute infections and an intermittent, cyclic retreatment schedule that may be repeated every 3 to 12 months for other authorized uses.


Q: Are there any specific safety warnings for older adults using Top Shot?

Regulatory documents advise caution when considering this medication for elderly patients, often due to the presence of potential co-therapy (concurrent medication use). Official studies also note that they did not include sufficient numbers of subjects over 65 to determine if they respond differently compared to younger adults.


Q: Is Top Shot a new type of medication or has it been around for a while?

The active ingredient in Top Shot has an established history of use and is included on the World Health Organization’s Model List of Essential Medicines. This indicates it is an established product.


Q: How does Top Shot compare to other treatments for the same condition, in a general sense?

Top Shot is distinct because of its highly selective mechanism of action. The drug targets specific channels, called Glutamate-Gated Chloride Channels (GluCls), which are specific to invertebrates. This interaction results in flaccid paralysis of the parasite.


Q: What makes Top Shot different from older medications used to treat this health issue?

A key difference is the drug’s molecular action, which is selectively toxic to parasites. It locks the parasite’s specific nerve channels open and utilizes a host-body pump (P-glycoprotein) to actively limit the drug from reaching the host's central nervous system, establishing selective toxicity.


Q: Will Top Shot cause a noticeable change right away, or does it take time to work?

The active substance typically reaches its highest concentration in the blood approximately 4 hours after being taken. However, official treatment criteria require repeated laboratory examinations over several months to monitor the resolution of the infection.


Q: How long do the effects of Top Shot typically last after a dose?

The drug has an approximate half-life of 18 hours in the blood following oral administration. However, the overall antiparasitic effect can persist for months, which is why the official treatment schedule involves intermittent, cyclic retreatment for certain conditions.


Q: Is it common to feel tired or dizzy when starting Top Shot?

Official drug labels list both fatigue (tiredness) and dizziness as commonly reported adverse reactions. These effects are classified as common, meaning they occur in greater than 1 in 100 people.


Q: Do any common over-the-counter pain relievers or supplements interact with Top Shot?

The official label cautions about potential interactions with medications that affect specific enzyme systems in the body, such as the CYP3A4 enzyme or the P-glycoprotein transporter. It is advisable to inform a healthcare provider of all prescription and non-prescription products, including supplements.


Q: Does Top Shot have an effect on a person's ability to drive or operate machinery?

Official information states that the drug can affect a person's alertness or coordination. A person should avoid driving, operating machinery, or performing tasks requiring alertness until they understand how the medication affects them.


Q: Do official documents address the use of alcohol while taking Top Shot?

Official sources note that it is unknown if drinking alcohol will directly affect the drug’s effectiveness. However, they caution that the risk of central nervous system side effects, such as sleepiness and dizziness, may be increased when the drug is used concurrently with alcohol.


Q: Can Top Shot affect the results of routine lab tests, as noted in the drug information?

Regulatory documents mention that co-administration with the anticoagulant Warfarin has resulted in an increased International Normalized Ratio (INR), which is a common blood test. Changes in liver enzyme levels have also been noted in clinical data.


Q: Is Top Shot covered by standard prescription drug plans, generally speaking?

The active ingredient in this product is available as an FDA-approved generic medication and is also included on the WHO Model List of Essential Medicines. These factors typically suggest broad availability.


Q: What should be done if an allergic reaction is suspected while taking Top Shot?

The official label notes the potential for severe, life-threatening allergic reactions, such as anaphylaxis. If symptoms like hives, difficulty breathing, or swelling of the face, tongue, or throat are suspected, immediate medical help, such as calling emergency services, should be considered.


Q: What are the key differences between the brand name Top Shot and its generic name (if applicable)?

Top Shot is the brand name designated by the manufacturer for the product. Its generic name, which refers to the active ingredient, is Ivermectin. The active ingredient, its dosing strength, and its approved uses are defined as the same between the brand and generic forms.


Q: Is there a generic version of Top Shot currently available or in development?

Yes, the active ingredient Ivermectin has multiple FDA-approved generic versions that are currently available for patient use.


Q: Do regulatory bodies classify Top Shot as a controlled substance?

Regulatory bodies, such as those that oversee the Controlled Substances Act, do not classify this drug as a scheduled narcotic or psychotropic medication. It is not designated as a controlled substance.


Q: Is there information on Top Shot's use for treating conditions other than its primary indication?

Regulatory bodies only authorize and approve this drug for treating specific parasitic infections and skin conditions, as defined on the official label. Prescribing the drug for any unapproved or off-label condition is outside of its official indications.


Q: Can Top Shot cause weight changes, and is this listed as a known side effect?

Rapid weight gain has been reported as a less common adverse reaction in clinical data for this product.


Q: Is it common to experience a metallic taste or dry mouth while using Top Shot?

Official adverse reaction lists do not include metallic taste or dry mouth as commonly reported side effects.


Q: Is 'feeling jittery' a recognized, mild side effect of Top Shot?

Official adverse reaction lists do not specifically mention the feeling of 'jitteriness.' However, they do list related central nervous system effects, such as insomnia (difficulty sleeping) and somnolence (drowsiness).


Q: Is Top Shot described as having the potential for dependence or tolerance development?

The drug is not classified as a controlled substance. Analyses regarding the persistence of efficacy or tolerance development were not performed in certain studies.


Q: Does Top Shot contain any ingredients that commonly cause allergic reactions (e.g., dyes, common allergens)?

Official documents list the inactive ingredients, such as starches and magnesium stearate, in the formulation. The label includes a general warning regarding known hypersensitivity to the active ingredient or any component of the formulation.


Q: Does Top Shot interact with herbal remedies, such as St. John's wort?

Regulatory documents specifically caution about co-administration with any products that are potent inhibitors of the CYP3A4 enzyme or the P-glycoprotein transporter. General caution is advised regarding all prescription and non-prescription products, including herbals.


Q: Are there any common misconceptions about Top Shot that are clarified in official documents?

Regulatory bodies have issued public statements clarifying that the drug is only approved for specific parasitic infections. These statements confirm the limitations of the drug's officially authorized uses.


Q: Are there any specific symptoms that warrant immediate medical attention while on Top Shot?

Symptoms that warrant immediate attention include signs of serious reactions like hives, difficulty breathing, swelling of the face or throat, altered mental status, seizures, or sudden vision changes. Immediate medical help should be sought if these symptoms occur.


How should Top Shot be stored and disposed of?

Storage Conditions

Top Shot (Ivermectin) oral tablets must be stored at room temperature, typically below 25 C or 30 C, as defined by regulatory labeling. The product must be kept in the original container, tightly closed, and away from excess heat and moisture, which includes avoiding storage in a bathroom. This medication must remain in its packaging to protect the product from light and maintain its stability. The tablets should never be frozen.

Disposal Instructions

For child safety, the medicine must be stored out of the sight and reach of children.

Any unused or expired product must be disposed of in accordance with local requirements. Due to the drug's classification as toxic to aquatic life, it is prohibited to throw the tablets into household waste or dispose of them via wastewater (down a sink or toilet).

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

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