De-Worm

Quick links to important sections

De-Worm

Medically reviewed

Laura Arias

Last updated on 22/12/2025

This page provides general, reference-level information compiled from official medical sources. It is not a substitute for professional medical advice, diagnosis, or treatment. For decisions about your health, please consult a qualified healthcare professional.

Overview of De-Worm

Quick Facts

Property Description
Active Ingredient Mebendazole
Form Oral tablet and oral suspension
Pharmacological Class Anthelmintic drug (Anti-parasitic agent)
Common Use Treating parasitic worm infections
Origin Synthetic compound (Benzimidazole carbamate derivative)

De-Worm: Definition and Anthelmintic Classification

De-Worm is a medication containing the single active ingredient Mebendazole, which is a synthetic compound specifically classified as an anthelmintic drug. This means the drug's fundamental function is to act against helminths, or parasitic worms, establishing its definitive role as an anti-parasitic agent.

Mebendazole is chemically defined as a derivative of the benzimidazole carbamate class. This active ingredient is clinically recognized for its efficacy against a range of intestinal worm infections, including pinworm and roundworm. Mebendazole is utilized to treat infections caused by specific types of worms, which characterizes the medication's specific, targeted function against certain parasitic illnesses. As a single-ingredient product, De-Worm focuses solely on the well-established benzimidazole mechanism.


Form, Composition, and General Therapeutic Purpose

The medication is formulated for oral administration, meaning it must be taken by mouth, and is typically supplied as an oral tablet or an oral suspension. The general therapeutic purpose of De-Worm is to help eliminate parasitic worm infections within the body, often used in scenarios involving common community transmission of parasites.

Benzimidazole drugs like mebendazole are recognized for their effectiveness in treating soil-transmitted worm infections in humans. This indicates that the medication is a reliable tool for controlling these types of parasitic infections. Its general function is achieved by severely disrupting the worms' ability to absorb vital nutrients, such as glucose, and damaging their internal structures. By starving and disabling the parasitic worms, this anthelmintic agent assists the body in the clearance of the infection, which is the comprehensive goal of its use.

What side effects are possible with De-Worm?

Possible Side Effects and Safety Information

Adverse reactions associated with De-Worm are documented across several organ systems, primarily involving the digestive system and central nervous system. The information is structured according to regulatory classifications of frequency and clinical significance.

Adverse Reaction Categories

Classification Common Reactions (ge 1/100 to < 1/10) Rare and Serious Reactions (< 1/1,000)
Gastrointestinal Abdominal pain, nausea, vomiting, diarrhea None documented in this class
Nervous System Headache, dizziness None documented in this class
Hepatobiliary Transient elevation of liver enzymes (transaminases) Hepatitis, severe liver dysfunction
Immune/Skin Hypersensitivity reactions (rash, pruritus) Stevens-Johnson syndrome, toxic epidermal necrolysis, anaphylactic reaction
Blood/Lymphatic None documented in this class Agranulocytosis, pancytopenia, aplastic anemia

Clinically Significant Safety Considerations

Regulatory documents emphasize specific monitoring requirements and limitations for De-Worm due to the potential for rare, serious events:

  • Hepatotoxicity Monitoring: Liver function tests should be conducted before starting treatment and periodically during therapy, especially for patients on high doses or extended regimens, or those with pre-existing liver impairment. Treatment discontinuation is advised if persistent, significant liver enzyme elevation occurs.
  • Severe Dermatologic and Blood Reactions: Rare but life-threatening events, including severe skin reactions (like Stevens-Johnson syndrome) and serious blood disorders (like aplastic anemia), have been documented. Patients should be monitored for signs of these conditions.
  • Use in Specific Populations: Use in pregnancy is typically restricted, especially during the first trimester, as the potential risk to the fetus must be carefully weighed against the therapeutic benefit. Its use in very young children is covered by specific age or weight-based dosing guidelines.

This structure of known risks from official regulatory sources defines the safety profile of De-Worm, balancing the high frequency of common, generally mild gastrointestinal and central nervous system effects with the required vigilance for uncommon but severe hepatologic or hematologic events.

Overdose and Emergency Response

The official regulatory profile for Mebendazole (De-Worm) overdose documents both acute and severe manifestations, along with mandated emergency actions. Acute overdosage may result in transient gastrointestinal complaints, including abdominal cramps, nausea, vomiting, and diarrhoea. These are the most commonly documented presentations.

However, regulators note that substantially higher than recommended dosages or prolonged exposure are associated with severe outcomes, including reversible liver function disturbances, hepatitis, neutropenia, agranulocytosis, and glomerulonephritis. In cases of severe, accidental high exposure, particularly in infants below the age of 1 year, life-threatening events such as convulsions, respiratory arrest, and tachyarrhythmia have been reported. Immediate medical attention is required upon suspected overdosage.

Treatment is strictly symptomatic and supportive therapy. Regulatory guidance includes procedural steps such as the induction of vomiting and purging and the administration of activated charcoal. It is explicitly stated in prescribing information that no specific antidote is known to exist. Due to the risk of severe hematologic and hepatorenal complications, monitoring of blood counts and liver and renal function tests is necessary following high exposure.

Therapeutic Uses of De-Worm

Main Uses and Benefits of De-Worm

De-Worm is an anthelmintic medication designed to eliminate various types of parasitic worm infections from the human body. It functions by interfering with the metabolic processes of the parasites, effectively preventing them from absorbing the glucose necessary for their survival and reproduction.

Primary Conditions Treated

This medication is primarily used to treat infections caused by common intestinal parasites, including:

  • Pinworms (Enterobiasis): Small, white worms that typically cause itching around the anal area.
  • Whipworms (Trichuriasis): Parasites that inhabit the large intestine.
  • Roundworms (Ascariasis): Large parasitic worms that can reside in the small intestine.
  • Hookworms (Ancylostomiasis and Necatoriasis): Parasites that attach to the intestinal wall and feed on blood.

Therapeutic Benefits

By addressing the underlying parasitic infection, the use of De-Worm provides several clinical benefits:

  • Eradication of Parasites: The medication targets and eliminates both the adult worms and, in some cases, the eggs or larvae, depending on the specific parasite species.
  • Resolution of Symptoms: Treatment helps alleviate the physical symptoms associated with infestations, such as abdominal pain, bloating, diarrhea, and persistent itching.
  • Prevention of Complications: Timely treatment reduces the risk of long-term health issues associated with chronic parasitic infections, such as anemia, nutritional deficiencies, and intestinal blockages.
  • Reduction of Transmission: Eliminating the parasite from the host helps decrease the likelihood of spreading the infection to other individuals within a household or community.

Regulatory References

  1. NIH MedlinePlus overview on Mebendazole

Eligibility and Restrictions for Use

Eligibility Profile: Who Can and Cannot Use De-Worm (Mebendazole)

This eligibility profile is based strictly on information found in official governmental regulatory documents (e.g., FDA, EMA) and is not medical advice.


Contraindications and Non-Eligibility

The medicine must not be used in individuals who have a known hypersensitivity or allergy to mebendazole or any of its inactive ingredients.

Regulatory agencies generally contraindicate or do not recommend use in infants under 1 year of age due to reports of convulsions in this population post-marketing.

Concomitant use with the medicine metronidazole is discouraged due to an increased risk of severe skin reactions.


Eligibility and Restricted Use

Population Group Regulatory Status
Children 2 years and older & Adults Generally eligible for use.
Children 1 to 2 years Safety and efficacy not fully established; use requires careful consideration.
Pregnant Women Not recommended during the first trimester; use only if benefit justifies risk.
Severe Hepatic Impairment Use with caution and may require close monitoring of liver function.
Breastfeeding Women Caution advised, as it is unknown if the drug is excreted in human milk.

Eligibility is defined by age, allergy status, and physiological state. The drug is typically approved for use in individuals two years of age and older.

What should I know about interactions with other medicines?

Interactions with other medicines and products

This section outlines interactions with other drugs and substances that have been officially documented in government regulatory documents for products containing the active ingredients in De-Worm (e.g., Mebendazole/Albendazole).

Clinically Significant Interactions

Co-administration with specific medicines may alter the systemic concentration of the active ingredient, requiring official constraints on use:

  • Medicines that Decrease De-Worm Levels: Co-administration with strong enzyme inducers, such as the antiepileptic medicines Phenytoin, Fosphenytoin, or Carbamazepine, can significantly increase the metabolism of De-Worm's active ingredient. This interaction may result in lower concentrations of the active medicine in the body.

  • Medicines that Increase De-Worm Levels: Co-administration with the H2-receptor antagonist Cimetidine may decrease the metabolism of the active ingredient, potentially increasing its systemic concentration. This typically requires close observation.

Pharmacodynamic and Toxicity Risk

Specific combinations carry a heightened risk of adverse effects due to overlapping toxicity profiles:

  • Metronidazole: Concomitant use with this nitroimidazole-class antibiotic is officially documented as increasing the risk for severe cutaneous reactions, such as Stevens-Johnson Syndrome and Toxic Epidermal Necrolysis. This combination is generally advised to be avoided.

  • Myelosuppressive Agents: The combination of De-Worm's active ingredient with other agents known to cause myelosuppression may result in an additive effect, necessitating monitoring of blood counts.

Other Population Constraints

Official labeling notes that the systemic exposure of the active ingredient may be increased in patients with hepatic impairment, which can affect the risk of interactions with other medicines.

Mechanism of Action

Targeted Disruption of Parasite Structure and Energy

The primary action of Mebendazole is its high-affinity binding to the beta-tubulin protein of the parasitic worm. The binding affinity is substantially higher for parasitic beta-tubulin. This interaction acts as an inhibitor of tubulin polymerization, which causes the rapid destruction and disassembly of the worm's internal structural components, known as microtubules. This mechanism involves structural and metabolic modulation.


Mechanistic Cascade Leading to Energy Failure

The loss of microtubules in the worm's intestinal cells causes a failure in nutrient assimilation, resulting in severe impairment of glucose uptake from the host. This initiates a cascade of energy failure, rapidly depleting the worm's glycogen reserves and causing a sharp decrease in ATP production. The result is helminth immobilization and cessation of biological viability.


Mechanistic Constraints

The mechanism is subject to physiological constraints: due to the drug’s poor absorption into the bloodstream, its microtubule-disrupting action is largely confined to the gastrointestinal lumen, limiting its effect on parasites in deep tissue. Resistance can also arise through genetic mutations in the worm's beta-tubulin, compromising the binding mechanism.

Dosage and Administration Information

Mebendazole (De-Worm) is administered exclusively by the oral route, typically supplied as a 100 mg or 500 mg chewable tablet or an oral suspension. The official dosing regimen is specific to the type of infection being addressed.

For pinworm infections, the standard regimen is a single 100 mg oral dose. For infections involving roundworm, hookworm, or whipworm, the schedule is 100 mg twice daily (morning and evening) for three consecutive days. Alternatively, some formulations are officially prescribed as a single 500 mg dose for these indications.


The medication is administered without regard to food intake, meaning it can be taken with or without meals. The 100 mg tablet may be swallowed whole, chewed, or crushed and mixed with food, but the 500 mg tablet must be chewed completely before swallowing. No special procedures, such as fasting or purging, are required before treatment.

The dosage schedule applies to pediatric patients two years of age and older, with efficacy not established below this age. The full treatment course is short (one or three days). If the patient is not cured three weeks after the initial course, a second course of treatment is advised.

Recent Clinical Evidence

Research Evidence / Overview of Studies for De-Worm


Evidence for Use in Treating Intestinal Nematode Infections (Roundworm, Hookworm, Whipworm)

Research has primarily examined the use of de-worming agents for common intestinal worms through Randomized Controlled Trials (RCTs) and larger systematic reviews. These studies were mostly applied in research contexts involving populations in areas where these infections are widespread, particularly focusing on school-aged children. The main outcomes that were measured included the parasite clearance rate and the egg reduction rate, which looks at how many eggs were found before and after treatment.

Findings describe patterns observed in the studies where measurements of parasitological clearance rates were reported across the treated groups. Comparative studies researched how these clearance measurements were compared to those of other standard treatments; the findings indicate some variability in clearance rates depending on the specific de-worming agent being studied.

Long-Term Studies and Follow-up

Research has explored the need for long-term follow-up to assess the persistence of measured parasite clearance and the rates at which re-infection may occur, particularly in areas with high prevalence. While some trials studies monitored outcomes for a few months (e.g., 3 to 6 months), this evidence provides limited insight into long-term changes over a year or more. Long-term effects are not fully established, and comparative evidence is lacking regarding which strategies or agents may offer the most sustained clearance over extended periods.


What Remains Uncertain About the Research for De-Worm

While many studies contribute to the broader evidence landscape, several areas remain unclear. Evidence quality varies across studies, particularly in areas using less rigorous designs or smaller sample sizes. Subgroup findings are uncertain, as many trials did not have enough participants to reliably assess whether certain age groups or those with pre-existing conditions may respond differently. Furthermore, there is limited information for long-term outcomes, meaning the certainty remains low regarding the effects of treatment maintained over many years. Study results reflect the specific conditions under which they were conducted, and findings describe group patterns, not personal outcomes.

Key Studies & References

  1. Long-Term Follow-up Data on Re-infection Rates of Schistosomiasis and Taeniasis Following Treatment: A Cohort Study

Frequently Asked Questions (FAQ)

Common questions about De-Worm (FAQ)


Q: How long does Mebendazole stay in your system?

A: Official product information on how the body handles the medicine (pharmacokinetics) indicates that the medicine's apparent elimination half-life is typically reported to range from 3 to 6 hours in most people after taking a single oral dose.

Q: Can I take this medication on an empty stomach?

A: According to the official prescribing information, this medication can be taken with or without food. Regulatory information indicates that it can be taken without regard to food intake.

Q: How often do I need to take the medicine for a roundworm infection?

A: The treatment for these infections follows a specific regimen given over several consecutive days, with doses taken at set intervals. The full dosing schedule for roundworm and certain other infections is determined by the prescribing healthcare professional.

Q: What happens if I forget a dose?

A: Patient guidelines generally recommend that if a dose is missed, it should be taken as soon as it is remembered. However, if it is nearly time for the next scheduled dose, regulatory guidance suggests skipping the missed one and continuing the regular schedule. Taking two doses at the same time is not recommended.

Q: How does Mebendazole kill the worms?

A: The medicine works by binding to the parasitic worm's internal structures, called microtubules, which prevents them from forming. This action causes the worm to lose its ability to absorb vital nutrients like glucose. This mechanism results in the worm's energy failure, leading to a loss of viability.

Q: What are the main symptoms of a parasitic worm infection that De-Worm treats?

A: Official drug information and patient education materials note that this medicine treats infections caused by certain parasites. For instance, pinworm infections, which are commonly treated, may cause reported symptoms such as anal itching and sleeplessness.

Q: What should I do if I experience a severe allergic reaction?

A: Regulatory documents indicate that rare but serious adverse reactions, including severe allergic reactions like anaphylaxis and severe skin conditions like Stevens-Johnson syndrome, have been reported. Official guidance for severe reactions requires immediate medical attention.

Q: How long until I feel better after starting treatment?

A: Patient information from regulatory agencies suggests that while the medicine begins working quickly, it may take several days to clear all the worms. Generally, symptoms of the infection often start to disappear within one week of starting the treatment course.

Q: Can I take De-Worm if I am taking blood thinners (e.g., Warfarin)?

A: Mebendazole is not specifically listed as having a direct interaction with common blood thinners like Warfarin in regulatory product labels. Individuals using this medicine are generally advised to inform their healthcare provider about all current medications, as this may be necessary for treatment monitoring.

Q: Is this medicine safe to use while breastfeeding?

A: Official regulatory labels advise that small amounts of Mebendazole may be found in human milk. Caution is advised when the medicine is used by breastfeeding women. Official documents state that the potential effects on a nursing infant are not fully established.

Q: What is the difference between the 100 mg and the 500 mg tablet?

A: The two strengths are intended for different dosing regimens or specific parasitic infections as determined by a healthcare provider. Official instructions specify that the 500 mg tablet requires complete chewing before it is swallowed, unlike the 100 mg tablet.

How should De-Worm be stored and disposed of?

How to Store and Dispose of De-Worm (Mebendazole)

Official regulatory labeling dictates strict conditions for the storage and disposal of this anthelmintic medication.

Storage Requirements

Mebendazole must be stored at controlled room temperature, typically between 20 C and 25 C, and kept from freezing.

Storage Constraint Requirement
Environment Protect from light, moisture, and excess heat. Store in a dry place
Packaging Keep the container tightly closed and use the original packaging
Stability Limit Discard any unused suspension one month after the bottle is first opened
Child Safety Must be stored out of the sight and reach of children

Disposal Instructions

Unused or expired medication must not be discarded in the household trash or flushed down the toilet (wastewater). Disposal must follow local regulations and authorized drug take-back programs.

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

Available in countries:

Equivalent of De-Worm found in:

A-Z Index: