Tergum

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Tergum

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 Tergum

Property Description
Active ingredient Ivermectin
Form Oral tablets, Topical cream, Topical lotion
Pharmacological class Antiparasitic agent, Macrocyclic Lactone
General purpose Elimination of internal and external parasitic infestations
Origin Semisynthetic (derived from Streptomyces avermitilis)

Tergum: Definition and Pharmacological Classification

Tergum is a pharmaceutical entity defined by its singular active ingredient, Ivermectin, which is recognized as a potent semisynthetic anthelmintic agent. It belongs to the macrocyclic lactone class, a distinctive family of drugs recognized for its efficacy against numerous parasitic diseases. The drug is primarily classified as a broad-spectrum anti-parasitic agent intended to eliminate pathogenic organisms in humans. It is also functionally classified as a scabicide and pediculicide, highlighting its effectiveness against external infestations like mites and lice.

Composition and Available Forms

Ivermectin's origin is scientifically defined as semisynthetic, as it is chemically derived from the fermentation products of the soil bacterium Streptomyces avermitilis. Tergum is made available as a single active ingredient product in multiple dosage forms, which include the oral tablet for systemic internal treatment and topical preparations, such as a cream or lotion, for application directly to the skin surface. This versatility ensures the drug can address infestations that manifest both internally and externally.

General Purpose and Therapeutic Intent

The overarching general purpose of Tergum is to provide effective, targeted elimination and resolution of parasitic infestations in humans. Ivermectin is recognized as an essential medicine, signifying its established importance in public health. The drug's mechanism relies on selective toxicity, exploiting nerve-muscle systems unique to the parasite to induce rapid paralysis and ensure the organism's clearance.

What side effects are possible with Tergum?

Possible Side Effects and Safety Information

The official safety profile for Tergum (Ivermectin) classifies potential adverse reactions based on their frequency of occurrence and the physiological system affected, adhering to regulatory standards.

Frequency and System-Organ Class

The most commonly documented reactions affect the Gastrointestinal Disorders and Nervous System Disorders System Organ Classes (SOCs). Reactions are categorized as Common if they occur in at least 1 in 100 treated patients. These include effects like fatigue, dizziness, somnolence, nausea, vomiting, diarrhea, pruritus, and rash. Less frequently, reactions are classified as Uncommon, such as leucopenia, tremor, and vertigo.

For the topical forms, effects are primarily local, including skin irritation and erythema at the application site.


Serious Reactions and Special Safety Patterns

Official labeling documents rare, serious adverse reactions whose frequency is classified as Not Known, including severe cutaneous reactions such as Toxic Epidermal Necrolysis (TEN) and Stevens-Johnson Syndrome (SJS). Hepatic impairment, evidenced by elevated liver enzyme levels, is also noted.

Unique to the treatment of certain parasitic infections is the Mazzotti reaction, a complex of symptoms (including fever, rash, and arthralgia) that is typically observed after the first dose of the oral tablet and is related to the rapid death of microfilariae.

Constraints and Limitations

The medicine is contraindicated in individuals with known hypersensitivity to the active substance. Regulatory documents also note specific population constraints: the safety and effectiveness of the oral tablet are not established for pediatric patients weighing less than 15 kg. Caution is noted for use in individuals with compromised blood-brain barrier function.

Overdose and Emergency Response

Overdose Manifestations and Severe Outcomes

Tergum overdosage, defined by regulatory authorities as a significant accidental or intentional overexposure, is associated with a specific profile of clinical signs documented in official labeling. Initial manifestations often include gastrointestinal disturbances such as nausea, vomiting, diarrhea, and abdominal pain. Other systemic signs may include headache, dizziness, asthenia (general weakness), rash, and edema.

The regulatory profile explicitly notes the potential for severe and potentially life-threatening outcomes. These severe manifestations involve the central nervous system, including ataxia (loss of coordination), tremors, seizures, and coma. Cardiovascular collapse, defined as hypotension (low blood pressure), and dyspnea (respiratory distress) are also documented as critical toxic effects.

Mandated Emergency Action

Due to the potential for severe toxicity, regulatory guidance mandates that individuals must seek immediate medical attention and contact a Poison Control Center or Emergency services immediately if overdosage is suspected. The official prescribing information notes that no specific antidote is known for Ivermectin overdosage.

Consequently, the officially described management measures are strictly focused on symptomatic and supportive treatment. Officially described procedures may involve the administration of activated charcoal or gastric lavage, followed by continuous close observation or hospital monitoring to manage vital signs.

Therapeutic Uses of Tergum

What Tergum Treats: Main Uses and Benefits

Tergum, containing Ivermectin, is applied in addressing multiple parasitic and arthropod-driven conditions presenting with systemic or localized discomfort. The oral form is generally used to help with two important internal parasitic infections. The medication plays a role in managing conditions associated with acute or disruptive episodes across several therapeutic domains.

It is commonly used to help with infestations like scabies and pediculosis (lice), treating internal worm infections such as Strongyloidiasis (threadworm), and may be part of symptomatic management of neglected tropical diseases, including Onchocerciasis (river blindness) and Lymphatic Filariasis. This therapeutic approach is relevant when symptoms become temporarily overwhelming, and provides supportive relief when symptoms interfere with daily functioning.

Quick Fact: Relief for Intense Pruritus

Tergum is commonly used for managing conditions characterized by symptoms related to inflammatory or irritative states, notably the intense, persistent itching (pruritus) and skin manifestations associated with parasitic and mite infestations.

Eligibility and Restrictions for Use

Who Can and Cannot Use Tergum? (Ivermectin)

Eligibility for Tergum use is strictly regulated, defining specific populations who must avoid the medicine (contraindications) and those who require conditional use based on age or underlying health status.


Contraindications and Exclusions

Tergum is contraindicated for patients with a known history of hypersensitivity (allergy) to Ivermectin or any component of the formulation. The medicine is generally contraindicated in pregnant patients, as designated by the FDA's Pregnancy Category C status, and is not recommended for women who are breastfeeding during the first week after giving birth.


Age and Condition-Based Restrictions

Population Group Eligibility Status
Children Oral use is not established for those weighing less than 15 kilograms (33 pounds).
Older Adults Generally allowed, but caution is required due to the higher potential for age-related decline in hepatic or renal function.
Loa loa Co-infection Use is restricted due to the risk of severe adverse neurological reactions (neurotoxicity).
Immunocompromised Efficacy is often not established, and cure may be unachievable in severely immunocompromised patients, such as those with HIV.

What should I know about interactions with other medicines?

Interactions with other medicines and products

The interaction profile for Tergum (Ivermectin) is officially documented by regulatory authorities, focusing on pharmacokinetic (PK) and pharmacodynamic (PD) mechanisms that alter systemic exposure or additive effects. No medicinal products are formally listed as contraindicated for co-administration in major regulatory labels.

Pharmacokinetic Interaction Patterns

The systemic exposure of Ivermectin is susceptible to change when co-administered with certain medications. The active ingredient is a substrate for the CYP3A4 enzyme and the P-glycoprotein (P-gp) efflux transporter. Consequently, co-administration with potent CYP3A4 inhibitors may increase Ivermectin plasma concentrations by reducing metabolic clearance. Conversely, CYP3A4 inducers may decrease concentrations. Similarly, P-gp inhibitors may result in increased absorption and systemic exposure.

Administration and Pharmacodynamic Considerations

Administration of the oral tablet with food increases its bioavailability and resulting systemic exposure. This is a documented administration-related pharmacokinetic interaction. A key pharmacodynamic consideration involves the risk of additive Central Nervous System (CNS) depression when Ivermectin is co-administered with other CNS-depressant drugs, including alcohol. Furthermore, the official label notes that patients with impaired liver function may experience increased systemic exposure, which is relevant when evaluating the overall risk of drug-drug interactions.

Mechanism of Action

Molecular Target and Inhibition of Immune Cell Proliferation

Tergum acts as a reversible and selective inhibitor of the enzyme dihydroorotate dehydrogenase (DHODH), which is located in the inner mitochondrial membrane . DHODH is a key component of the de novo pyrimidine synthesis pathway. This molecular intervention blocks the essential generation of pyrimidines, the necessary building blocks for DNA and RNA in proliferating cells.

Since activated T and B lymphocytes rely heavily on this pathway for proliferation, the inhibition leads to a cytostatic effect that slows the expansion and clonal growth of these high-activity immune cells.

Impact on Activated Immune Cell Trafficking

By limiting the proliferation and reducing the number of activated immune cells in the peripheral circulation, the mechanism helps control the systemic pool of these immune cell populations. This reduction in the peripheral pool results in decreased movement and infiltration of activated immune cells across the blood-brain barrier and into the central nervous system, thereby altering the immune cell presence in the CNS.

Dosage and Administration Information

How to Use Tergum

Tergum (Ivermectin) is used according to specific administration routes and frequency patterns dictated by the formulation and indication. The medication is delivered either systemically via the oral route or locally via topical application. The usage pattern is defined by established clinical guidelines.


Administration and Dosing

Oral Tablets

Oral Tergum is supplied as 3 mg tablets and is dosed based on the patient's body weight. For parasitic infections such as Strongyloidiasis, a single dose of approximately 200 mu g/kg is typically administered.

  • Timing: Oral tablets must be taken on an empty stomach with water to ensure correct systemic absorption.
  • Frequency: Treatment for Strongyloidiasis is typically a single dose course. For conditions like Onchocerciasis, retreatment may be required at intervals as short as three months or, commonly, 12 months for chronic management.
  • Pediatric Use: The oral form is not generally recommended for children weighing less than 15 kg.

Topical Preparations

Topical forms are used for external conditions and follow application-based dosing:

  • 1% Topical Cream: Used for the treatment of rosacea and is applied once daily as a pea-sized amount to affected facial areas, avoiding the eyes and lips. This usage may extend over a long-term duration.
  • 0.5% Topical Lotion: Used for pediculosis (head lice) and is a single-use only course. The lotion is applied to dry hair and scalp, left on for 10 minutes, and then rinsed out with water. This form is approved for use in children 6 months of age and older.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Tergum

Evidence for Use in Treating Parasitic Worm Infections

The available research for Tergum's oral form includes Randomized Controlled Trials (RCTs), systematic reviews, and large-scale observational studies that have examined two primary conditions: Strongyloidiasis (intestinal threadworm infection) and Onchocerciasis (river blindness). For Strongyloidiasis, studies monitored patterns related to parasitological cure in adult patients. Research reported measurements of clearance rates that were observed in the studies and compared against those reported for other anthelmintic agents. However, research exploring long-term persistence of parasite clearance is not well characterized.

For Onchocerciasis, the evidence is derived from long-term, large-scale Mass Drug Administration (MDA) programs. These studies monitored broad populations, measuring the reduction of microfilarial load in the skin and changes in disease transmission rates over time. This research provides context on the drug's utility in public health strategies aimed at community-level disease control.

Evidence for Use in Addressing External Infestations

Research exploring Tergum’s use for external conditions, such as scabies and pediculosis (lice), consists of Randomized Controlled Trials comparing both oral and topical forms against standard topical treatments. These studies focused on two main outcomes: parasitological clearance and clinical cure (resolution of associated skin issues). Studies monitored patient conditions for an intermediate-term duration, typically up to 12 weeks, to assess changes in clearance rates.

Evidence for the Topical Treatment of Rosacea

The evidence for the topical cream formulation focuses on papulopustular rosacea in adult patients, relying on major pivotal, randomized, double-blind trials. Researchers measured success based on the Investigator's Global Assessment (IGA) score and the change in the count of inflammatory lesions. Pivotal trials reported measurements of the IGA success rate that were compared between the cream and the inactive control. However, the research is limited to the topical formulation, providing limited specific data on the drug's effect on persistent facial redness (erythema).

Frequently Asked Questions (FAQ)

Common questions about Tergum (FAQ)

Q: Is Tergum considered a long-term or short-term treatment?

A: The required length of treatment with Tergum is not standardized and depends entirely on the specific condition being addressed. For some parasitic infections, official instructions describe treatment as a single dose. Conversely, for chronic conditions such as river blindness or rosacea, treatment may involve repeat dosing over 3 to 12 months or ongoing use of the topical formulation.

Q: Does Tergum affect liver function?

A: Regulatory documents indicate that the use of Tergum has been associated with effects on liver function. This can be evidenced by elevated liver enzyme levels. Official safety data also notes that serious adverse reactions have included acute hepatitis (a form of liver inflammation).

Q: Why is Tergum not recommended for children?

A: According to official product information, the safety and effectiveness of the oral tablet formulation have not been established for pediatric patients weighing less than 15 kg. This restriction is based on the lack of sufficient regulatory data for use in that specific population.

Q: What kind of research has been done on the long-term use of Tergum?

A: Studies on the long-term use of Tergum are primarily derived from large-scale public health efforts. For instance, research evidence includes long-term, large-scale Mass Drug Administration (MDA) programs conducted for conditions like Onchocerciasis (river blindness) to monitor community-level disease control.

Q: What are the possible long-term side effects mentioned in regulatory data?

A: Regulatory documents typically categorize adverse reactions by how frequently they occur, not by how long they persist. While official safety data does not specifically classify effects as 'long-term,' safety monitoring of chronic conditions has been performed within long-term Mass Drug Administration programs.

Q: Can Tergum be used with other treatments for the same condition?

A: The interaction profile primarily documents how Tergum interacts with other medicines through pharmacokinetic mechanisms, which relate to how the body processes the drug. The concurrent use of Tergum with any other therapeutic product requires professional assessment, as there is potential for altered systemic exposure or additive effects.

Q: How does Tergum differ from other common medicines for the same condition?

A: Tergum's active ingredient belongs to the macrocyclic lactone class, which distinguishes it chemically from many other antiparasitic agents. Its mechanism relies on selective toxicity, meaning it exploits unique nerve-muscle systems in the parasite to induce paralysis and ensure the organism’s clearance from the body.

Q: Is Tergum generally safe for people who have kidney issues?

A: Official pharmacokinetic data, which describes how the body handles the medicine, indicates that less than 1% of the administered dose is excreted through the urine. The majority of the drug is eliminated via the feces. However, official documents advise caution for older adults who may have a general age-related decline in kidney function.

Q: What happens if I miss a day of taking Tergum?

A: Official patient instructions indicate that if a dose is missed, it can be taken as soon as it is remembered. However, if it is already almost time for the next dose, the missed dose is generally skipped. Instructions advise against taking double or extra doses to make up for a missed one.

Q: Is Tergum available as a generic drug?

A: Yes, official FDA records confirm that generic versions of the oral tablet formulation containing Ivermectin are approved and available. These generic versions are available options for patients.

Q: Can people with high blood pressure use Tergum?

A: Having high blood pressure (hypertension) is not listed as a formal exclusion for using the medication. However, official safety data indicates the medicine has been associated with effects such as low blood pressure (hypotension) in some patients.

Q: Are there any known interactions between Tergum and herbal supplements?

A: There are no specific interactions between Tergum and individual herbal supplements documented in major official labels. However, because co-administration with any other product may affect how the body processes the drug and its systemic exposure, the co-administration of any other product may require discussion with a healthcare professional.

Q: If I am taking Tergum, can I still drive?

A: Official product information advises caution regarding activities requiring full attention. Because Tergum may cause side effects such as dizziness or drowsiness (somnolence), official documents advise patients to be cautious when performing potentially hazardous activities, such as driving or operating machinery.

Q: Is it normal to feel a mild headache after starting Tergum?

A: Headache is a reported side effect of Tergum in official safety documents. For patients being treated for certain filarial infections, headache may specifically be observed as a common symptom that is part of the post-treatment reaction.

Q: How long do the effects of one use of Tergum last?

A: Following a single oral dose, the plasma half-life of Tergum is approximately 18 hours. The half-life is a pharmacokinetic measurement indicating the amount of time required for the concentration of the active ingredient in the body to be reduced by half.

Q: What is the difference between Tergum and a placebo in clinical trials?

A: In clinical trials, the medication demonstrated greater effectiveness in achieving specific clinical goals when compared to an inactive control (placebo). These goals included defined measures like Investigator’s Global Assessment (IGA) success rates for rosacea and parasitological clearance rates for certain infections.

Q: Can I take Tergum if I also take aspirin?

A: The official interaction profile does not list aspirin as a specific, formal interaction. However, all co-administered medications, including common over-the-counter products, may require review by a healthcare professional to assess overall safety and risk.

Q: Is Tergum available over the counter in some places?

A: Tergum's active ingredient is classified as a prescription-only medicine in many countries for human systemic and topical use. This status means it is only legally available when prescribed by a licensed healthcare professional.

Q: Have there been any recent updates to the official safety warnings for Tergum?

A: Regulatory agencies continuously track and review the safety profile of all medicines, even after approval. Official updates or public health warnings related to new data are issued when deemed necessary by the regulatory body.

Q: How is Tergum use monitored in patients?

A: Monitoring may involve assessment of the patient's underlying health status, particularly liver function, as the drug can be associated with elevated liver enzymes. Follow-up is often performed to check for therapeutic clearance of the infection or resolution of the condition being treated.

Q: Does Tergum affect sleep patterns?

A: The official safety profile lists somnolence, or drowsiness, as a commonly reported side effect that may affect wakefulness. The full impact on a patient's general sleep patterns beyond drowsiness is not specifically detailed in the common side effect listings.

Q: How is the safety of Tergum tracked after it is released to the market?

A: Safety tracking is managed through the regulatory process of pharmacovigilance. This is a system where health bodies continuously monitor and evaluate data on suspected side effects once the medicine is available for use by the public.

Q: Does Tergum have known interactions with common cold or flu medications?

A: The official interaction profile does list potential interactions with certain common over-the-counter medications that may be found in cold or flu remedies. To ensure appropriate use, co-administration with any other medication may require review by a healthcare professional.

Q: What specific type of pain or discomfort does Tergum address?

A: The medication’s overarching purpose is the elimination and resolution of internal and external parasitic infestations. Any relief from pain or discomfort is secondary to the successful treatment of the underlying infection or condition itself, such as reducing skin lesions associated with rosacea.

Q: Is Tergum related to any older, discontinued medicines?

A: Tergum's active ingredient is scientifically defined as being derived from the avermectins. This is a family of compounds that originated from the soil bacterium Streptomyces avermitilis, placing it within a defined and established class of antiparasitic agents.

Q: Is there a patient information leaflet (PIL) available for Tergum?

A: Yes, regulatory requirements mandate the availability of official patient information. A Patient Information Leaflet (PIL) or equivalent Patient Package Insert (PPI) is provided to give the patient detailed, official information on the medicine's proper use and safety.

How should Tergum be stored and disposed of?

How to Store and Dispose of Tergum

The storage and disposal requirements for Tergum (Ivermectin) are strictly defined by regulatory labeling to maintain product stability and safety.

Official Storage Requirements

Tergum must be stored at controlled room temperature, specifically between 20 C and 25 C (68 F to 77 F). The product must be protected from light and moisture and kept in its original container, which should be tightly closed. It is mandatory to keep this medicine out of the sight and reach of children and to avoid freezing or exposure to excessive heat.

Disposal Instructions

To dispose of unused or expired Tergum, the recommended procedure is to utilize a drug take-back program. If a take-back option is unavailable, the product should be removed from its container, mixed with an undesirable substance (such as coffee grounds or dirt), and then sealed in a bag for disposal in household trash, avoiding release into wastewater.

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

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