Vermox mebendazole 500 mg Tablet, Chewable, 200-count — NDC 50458-675-20 (Billing 50458-0675-20)
This is a package of 200 tablets of Vermox mebendazole 500 mg Tablet, Chewable from Janssen Pharmaceuticals, Inc., marketed since Oct 2016 and currently FDA-listed. It is this product's only package size.
NDC database record
One package, one record: these facts belong to NDC 50458-675-20 alone.
- Record
- FDA NDC Directory package listing · Human prescription drug
- Code segments
- 50458 labeler · 675 product · 20 package
- Package marketed since
- Oct 20, 2016
- Sample package
- No — commercial package
- Listing certified through
- Dec 31, 2026
- Barcode (UPC)
- 0350458675207
- FDA record last changed
- Jul 24, 2026
Identity & classification
Regulatory identifiers FDA, NLM and CMS codes for this package
- RxCUI (RxNorm): 1855385
Where does this data come from?
- FDA openFDA NDC Directory · synced Oct 1, 2026
- FDA label on DailyMed · label index refreshed Oct 3, 2026
- RxNorm (NLM RxNav) · catalog refreshed Oct 1, 2026
- Medi-Span GPI (licensed)
- First Databank (licensed) · refreshed Oct 1, 2026
RxNorm drug class
This medicine belongs to the Anthelmintic class.
Where does this data come from?
- RxClass (NLM) · catalog refreshed Oct 1, 2026
Clinical
Mebendazole is used to treat several types of worm infections. Mebendazole (Vermox) is used to treat roundworm and whipworm infections. Mebendazole (Emverm) is used to treat pinworm, whipworm, roundworm, and hookworm infections. Mebendazole is in a class of medications called anthelmintics. It works by killing the worms.
Read the full MedlinePlus article ↗- It treats worm infections in the gut. Emverm covers hookworm, roundworm, pinworm and whipworm in people 2 and older. Vermox Chewable covers roundworm and whipworm in people 1 and o...
- Take it by mouth exactly as prescribed. With Emverm, you can chew it, swallow it, or crush it into food. With Vermox Chewable, chew it completely and don't swallow it whole. No fas...
- Most people have little trouble. Possible effects include stomach pain, nausea, vomiting, diarrhea, gas, loss of appetite and rash. Call your doctor for severe skin reactions, swel...
- Avoid it. Serious skin reactions, including Stevens-Johnson syndrome, have been reported when the two are used together. Tell me or your doctor about every medicine you take.
Patient education
Supplement & herbal interactions
Some supplements/herbs that may interact with Mebendazole — tap one for details:
Where does this data come from?
- MedlinePlus (NLM) · refreshed Oct 1, 2026
- FDA label on DailyMed · label index refreshed Oct 3, 2026
Ask a licensed pharmacist directly — free, answered by our team.
Pricing
A drug doesn't have one price. Each row is a different public payment system, and none is what you'd pay at the counter — that depends on your insurance. The ⓘ on each row explains what it measures.
| Price system | Per each | Per package |
|---|---|---|
| Retail pharmacies payNADAC · weekly | Not in the retail survey — common for institutional, discontinued, or low-volume packs. | |
| Medicaid paysCMS SDUD · 12 mo | No recent Medicaid claims on file for this NDC — rare and low-volume NDCs are suppressed in the public data. | |
| Medicare drug plans payPart D · quarterly | No Part D plan price is available for this NDC in our data. | |
Where does this data come from?
- CMS NADAC weekly file
- CMS ASP pricing files · refreshed Sep 20, 2026
- CMS Medicaid State Drug Utilization Data · refreshed Oct 4, 2026
- CMS Part D plan pricing files · refreshed Sep 24, 2026
- VA National Acquisition Center price file
Packaging — all sizes for this product
| Package NDC | Description | Marketing start | Marketing end | Status |
|---|---|---|---|---|
| 50458-0675-20 You're viewing this Main listing | 200 TABLET, CHEWABLE in 1 BOTTLE | 2016-10-20 | — | Active |
Therapeutic equivalents
| Product | Labeler | Pack | NADAC/unit | TE | Status | Price vs. this |
|---|---|---|---|---|---|---|
| Vermox 500 mgthis 50458-0675-20 | Janssen | 200 tablets | — | — | FDA listed | — |
Where does this data come from?
- FDA openFDA NDC Directory · synced Oct 1, 2026
- FDA Orange Book · refreshed Oct 3, 2026
- CMS NADAC weekly file
Availability & generic status
We did not find an FDA-approved generic match for this exact strength, form and route.
Where does this data come from?
- FDA Orange Book · refreshed Oct 3, 2026
Inactive Ingredients / Excipients
Inactive ingredients, also called excipients, are components of the drug product other than the active ingredient. They may include fillers, dyes, coatings, preservatives, flavors, or other formulation ingredients.
Where does this data come from?
IACT rows and label-wide narrative are kept separate; availability and product-level specificity depend on the submitted label.- FDA label on DailyMed · label index refreshed Oct 3, 2026
- FDA openFDA NDC Directory · synced Oct 1, 2026
Inactive ingredient FAQ
Are inactive ingredients the same for every manufacturer?
Why might an inactive ingredient be missing?
Can inactive ingredients matter?
Manufacturer & labeler
More NDCs from Janssen Pharmaceuticals, Inc. labeler code 50458
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Where does this data come from?
- FDA openFDA NDC Directory · synced Oct 1, 2026
- Drugs@FDA
Full prescribing information FDA SPL
🎯 Indications and Usage ▾
1 INDICATIONS AND USAGE VERMOX™ CHEWABLE is indicated for the treatment of patients one year of age and older with gastrointestinal infections caused by Ascaris lumbricoides (roundworm) and Trichuris trichiura (whipworm). VERMOX™ CHEWABLE is an anthelmintic indicated for the treatment of patients one year of age and older with gastrointestinal infections caused by: Ascaris lumbricoides (roundworm) and Trichuris trichiura (whipworm) ( 1 ).
⏱️ Dosage and Administration ▾
2 DOSAGE AND ADMINISTRATION The recommended dosage in patients one year of age and older is one VERMOX™ CHEWABLE 500 mg tablet taken as a single dose. Chew VERMOX™ CHEWABLE 500 mg tablet completely before swallowing. Do not swallow the tablet whole.
For patients who have difficulty chewing the tablet, approximately 2 mL to 3 mL of drinking water can be added to a suitably sized spoon and the VERMOX™ CHEWABLE 500 mg tablet placed into the water. Within 2 minutes, the tablet absorbs the water and turns into a soft mass with semi-solid consistency, which can then be swallowed. VERMOX™ CHEWABLE 500 mg tablet can be taken without regard to food intake [see Clinical Pharmacology (12.3) ].
The recommended dosage in patients one year of age and older is one single tablet of VERMOX™ CHEWABLE 500 mg taken as a single dose, chewed completely before swallowing ( 2 ). See Full Prescribing Information for administration instructions for patients who have difficulty chewing the tablets ( 2 )
💊 Dosage Forms and Strengths ▾
3 DOSAGE FORMS AND STRENGTHS Chewable Tablet: 500 mg round, flat radius-edged white to yellowish chewable tablet that is debossed with "M/500" on one side and "J" on the other side. Chewable Tablet: 500 mg ( 3 )
⛔ Contraindications ▾
4 CONTRAINDICATIONS VERMOX™ CHEWABLE is contraindicated in persons with a known hypersensitivity to the drug or its excipients. Patients with a known hypersensitivity to the drug or its excipients ( 4 )
⚠️ Warnings and Cautions ▾
5 WARNINGS AND PRECAUTIONS Risk of Convulsions: Convulsions in infants below the age of 1 year have been reported ( 5.1 ) Hematologic Effects: Neutropenia and agranulocytosis have been reported in patients receiving mebendazole at higher doses and for prolonged duration. Monitor blood counts in these patients ( 5.2 ) Metronidazole and Serious Skin Reactions: Stevens-Johnson syndrome/toxic epidermal necrolysis (SJS/TEN) have been reported with the concomitant use of mebendazole and metronidazole. Avoid concomitant use of mebendazole and metronidazole ( 5.3 )
5.1Risk of Convulsions Convulsions have been reported in infants below the age of 1 year during post-marketing experience with mebendazole [see Adverse Reactions (6.2) ] .
5.2Hematologic Effects Agranulocytosis and neutropenia have been reported with mebendazole use at higher doses and for more prolonged durations than is recommended for the treatment of soil-transmitted helminth infections. Monitor blood counts if VERMOX™ CHEWABLE is used at higher doses or for prolonged duration.
5.3Metronidazole Drug Interaction and Serious Skin Reactions Stevens-Johnson syndrome/toxic epidermal necrolysis (SJS/TEN) have been reported with the concomitant use of mebendazole and metronidazole. Avoid concomitant use of mebendazole and metronidazole.
🤒 Adverse Reactions ▾
6 ADVERSE REACTIONS Adverse reactions reported in clinical trials were anorexia, abdominal pain, diarrhea, flatulence, nausea, vomiting and rash. ( 6.1 ). To report SUSPECTED ADVERSE REACTIONS, contact Janssen Pharmaceuticals, Inc. at 1-800-JANSSEN (1-800-526-7736) or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.
6.1Clinical Studies Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice. The safety of mebendazole was evaluated in 6276 adult and pediatric subjects one year of age and older who participated in 39 clinical trials for treatment of single or mixed parasitic infections of the gastrointestinal tract. In these trials, the formulations, dosages and duration of mebendazole treatment varied.
Adverse reactions reported in mebendazole-treated subjects from the 39 clinical trials are shown in Table 1 below. Table 1: Adverse Reactions Reported in Mebendazole-Treated Subjects from 39 Clinical Trials Includes mebendazole formulations, dosages and treatment duration other than VERMOX™ CHEWABLE 500 mg tablet Adverse Reaction(s) Gastrointestinal Disorders Anorexia Abdominal Pain Diarrhea Flatulence Nausea Vomiting Skin and Subcutaneous Tissue Disorders Rash Clinical Studies with Mebendazole Chewable 500 mg Tablet The safety profile of mebendazole chewable 500 mg tablets administered as a single dose was evaluated in 677 pediatric subjects aged 1 to 16 years and in 34 adults.
The safety profile was consistent with the known safety profile of mebendazole.
6.2Postmarketing Experience The following adverse reactions have been identified in adult and pediatric patients postmarketing with mebendazole formulations and dosages other than the VERMOX™ CHEWABLE 500 mg tablet. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure. Table 2: Adverse Reactions Identified During Postmarketing Experience with Mebendazole Includes mebendazole formulations, dosages and treatment durations other than VERMOX™ CHEWABLE 500 mg tablet Adverse Reaction(s) Blood and Lymphatic System Disorders Agranulocytosis, Neutropenia Immune System Disorders Hypersensitivity including anaphylactic reactions Nervous System Disorders Convulsions, Dizziness Hepatobiliary Disorders Hepatitis, Abnormal liver tests Renal and Urinary Disorders Glomerulonephritis Skin and Subcutaneous Tissue Disorders Toxic epidermal necrolysis, Stevens-Johnson syndrome, Exanthema, Angioedema, Urticaria, Alopecia
🔄 Drug Interactions ▾
7 DRUG INTERACTIONS Concomitant use of mebendazole and metronidazole should be avoided [see Warnings and Precautions (5.3) ] .
👥 Use in Specific Populations ▾
8 USE IN SPECIFIC POPULATIONS
8.1Pregnancy Risk Summary The available published literature on mebendazole use in pregnant women has not reported a clear association between mebendazole and a potential risk of major birth defects or miscarriages [see Data ]. There are risks to the mother and fetus associated with untreated helminthic infection during pregnancy [see Clinical Considerations ] . In animal reproduction studies, adverse developmental effects (i.e., skeletal malformations, soft tissue malformations, decreased pup weight, embryolethality) were observed when mebendazole was administered to pregnant rats during the period of organogenesis at single oral doses as low as 10 mg/kg (approximately 0.2-fold the maximum recommended human dose (MRHD)).
Maternal toxicity was present at the highest of these doses [see Data ]. The estimated background risk of major birth defects and miscarriage for the indicated populations is unknown. All pregnancies have a background risk of birth defect, loss, or other adverse outcomes.
In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2–4% and 15–20%, respectively. Clinical Considerations Disease-Associated Maternal and/or Embryo/Fetal Risks Untreated soil-transmitted helminth infections in pregnancy are associated with adverse outcomes including maternal iron deficiency anemia, low birth weight, neonatal and maternal death. Data Human Data Several published studies, including prospective pregnancy registries, case-control, retrospective cohort, and randomized controlled studies, have reported no association between mebendazole use and a potential risk of major birth defects or miscarriage.
Overall, these studies did not identify a specific pattern or frequency of major birth defects with mebendazole use. However, these studies cannot definitely establish the absence of any mebendazole-associated risk because of methodological limitations, including recall bias, confounding factors and, in some cases, small sample size or exclusion of first trimester mebendazole exposures. Animal Data Embryo-fetal developmental toxicity studies in rats revealed no adverse effects on dams or their progeny at doses up to 2.5 mg/kg/day on gestation days 6–15 (the period of organogenesis).
Dosing at ≥10 mg/kg/day resulted in a lowered body weight gain and a decreased pregnancy rate. Maternal toxicity, including body weight loss in one animal and maternal death in 11 of 20 animals, was seen at 40 mg/kg/day. At 10 mg/kg/day, increased embryo-fetal resorption (100% were resorbed at 40 mg/kg/day), decreased pup weight and increased incidence of malformations (primarily skeletal) were observed.
Mebendazole was also embryotoxic and teratogenic in pregnant rats at single oral doses during organogenesis as low as 10 mg/kg (approximately 0.2-fold the MRHD, based on mg/m 2 ). In embryo-fetal developmental toxicity studies in mice dosed on gestation days 6–15, doses of 10 mg/kg/day and higher resulted in decreased body weight gain at 10 and 40 mg/kg/day and a higher mortality rate at 40 mg/kg/day. At doses of 10 mg/kg/day (approximately 0.1-fold the MRHD, based on mg/m 2 ) and higher, embryo-fetal resorption increased (100% at 40 mg/kg) and fetal malformations, including skeletal, cranial, and soft tissue anomalies, were present.
Dosing of hamsters and rabbits did not result in embryotoxicity or teratogenicity at doses up to 40 mg/kg/day (0.6 to 1.6-fold the MRHD, based on mg/m 2 ). In a peri- and post-natal toxicity study in rats, mebendazole did not adversely affect dams or their progeny at 20 mg/kg/day. At 40 mg/kg (0.8-fold the MRHD, based on mg/m 2 ), a reduction of the number of live pups was observed and there was no survival at weaning.
No abnormalities were found on gross and radiographic examination of pups at birth.
8.2Lactation Risk Summary Limited data from case reports demonstrate that a small amount of mebendazole is p… [Excerpted — this section continues on DailyMed.]
🤰 Pregnancy ▾
8.1Pregnancy Risk Summary The available published literature on mebendazole use in pregnant women has not reported a clear association between mebendazole and a potential risk of major birth defects or miscarriages [see Data ]. There are risks to the mother and fetus associated with untreated helminthic infection during pregnancy [see Clinical Considerations ] . In animal reproduction studies, adverse developmental effects (i.e., skeletal malformations, soft tissue malformations, decreased pup weight, embryolethality) were observed when mebendazole was administered to pregnant rats during the period of organogenesis at single oral doses as low as 10 mg/kg (approximately 0.2-fold the maximum recommended human dose (MRHD)).
Maternal toxicity was present at the highest of these doses [see Data ]. The estimated background risk of major birth defects and miscarriage for the indicated populations is unknown. All pregnancies have a background risk of birth defect, loss, or other adverse outcomes.
In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2–4% and 15–20%, respectively. Clinical Considerations Disease-Associated Maternal and/or Embryo/Fetal Risks Untreated soil-transmitted helminth infections in pregnancy are associated with adverse outcomes including maternal iron deficiency anemia, low birth weight, neonatal and maternal death. Data Human Data Several published studies, including prospective pregnancy registries, case-control, retrospective cohort, and randomized controlled studies, have reported no association between mebendazole use and a potential risk of major birth defects or miscarriage.
Overall, these studies did not identify a specific pattern or frequency of major birth defects with mebendazole use. However, these studies cannot definitely establish the absence of any mebendazole-associated risk because of methodological limitations, including recall bias, confounding factors and, in some cases, small sample size or exclusion of first trimester mebendazole exposures. Animal Data Embryo-fetal developmental toxicity studies in rats revealed no adverse effects on dams or their progeny at doses up to 2.5 mg/kg/day on gestation days 6–15 (the period of organogenesis).
Dosing at ≥10 mg/kg/day resulted in a lowered body weight gain and a decreased pregnancy rate. Maternal toxicity, including body weight loss in one animal and maternal death in 11 of 20 animals, was seen at 40 mg/kg/day. At 10 mg/kg/day, increased embryo-fetal resorption (100% were resorbed at 40 mg/kg/day), decreased pup weight and increased incidence of malformations (primarily skeletal) were observed.
Mebendazole was also embryotoxic and teratogenic in pregnant rats at single oral doses during organogenesis as low as 10 mg/kg (approximately 0.2-fold the MRHD, based on mg/m 2 ). In embryo-fetal developmental toxicity studies in mice dosed on gestation days 6–15, doses of 10 mg/kg/day and higher resulted in decreased body weight gain at 10 and 40 mg/kg/day and a higher mortality rate at 40 mg/kg/day. At doses of 10 mg/kg/day (approximately 0.1-fold the MRHD, based on mg/m 2 ) and higher, embryo-fetal resorption increased (100% at 40 mg/kg) and fetal malformations, including skeletal, cranial, and soft tissue anomalies, were present.
Dosing of hamsters and rabbits did not result in embryotoxicity or teratogenicity at doses up to 40 mg/kg/day (0.6 to 1.6-fold the MRHD, based on mg/m 2 ). In a peri- and post-natal toxicity study in rats, mebendazole did not adversely affect dams or their progeny at 20 mg/kg/day. At 40 mg/kg (0.8-fold the MRHD, based on mg/m 2 ), a reduction of the number of live pups was observed and there was no survival at weaning.
No abnormalities were found on gross and radiographic examination of pups at birth.
🧒 Pediatric Use ▾
8.4Pediatric Use The safety and effectiveness of VERMOX™ CHEWABLE 500 mg tablets have been established in pediatric patients 1 to 16 years of age. Use of VERMOX™ CHEWABLE 500 mg tablets in children is supported by evidence from adequate and well-controlled studies of VERMOX™ CHEWABLE 500 mg tablets [see Clinical Studies (14) ] . The safety and effectiveness of mebendazole, including VERMOX™ CHEWABLE have not been established in pediatric patients less than one year of age.
Convulsions have been reported with mebendazole use in this age group [see Warnings and Precautions (5.1) and Adverse Reactions (6.2) ].
🧓 Geriatric Use ▾
8.5Geriatric Use Clinical studies of mebendazole did not include sufficient numbers of subjects aged 65 and older to determine whether they respond differently from younger subjects.
🆘 Overdosage ▾
10 OVERDOSAGE In patients treated at dosages substantially higher than recommended or for prolonged periods of time, the following adverse reactions have been reported: alopecia, reversible transaminase elevations, hepatitis, agranulocytosis, neutropenia, and glomerulonephritis. Symptoms and signs In the event of accidental overdose, gastrointestinal signs/symptoms may occur. Treatment There is no specific antidote.
🧬 Clinical Pharmacology ▾
12 CLINICAL PHARMACOLOGY
12.1Mechanism of Action Mebendazole, a benzimidazole, is an anthelmintic [see Microbiology (12.4) ] .
12.3Pharmacokinetics Absorption Following oral administration of VERMOX™ CHEWABLE 500 mg tablet, the majority of the dose remains in the gastrointestinal tract where it exerts an anthelmintic effect locally. Dosing the VERMOX™ CHEWABLE 500 mg tablet with a high fat meal increases the bioavailability of mebendazole. In the clinical studies conducted in pediatric patients with soil transmitted helminth infections, the majority of these patients were administered VERMOX™ CHEWABLE 500 mg tablets with food.
Mean plasma pharmacokinetic parameters of mebendazole in healthy adult subjects under fasted and fed conditions are summarized in Table 3. Table 3: Mean (SD) Plasma Pharmacokinetic Parameters After a Single VERMOX™ CHEWABLE 500 mg Dose in Healthy Adult Subjects (n=16) Under Fasted and Fed (High-fat Meal) Conditions Parameter Fasted Fed C max (ng/mL) 14.0 (9.17) 56.2 (35.8) T max (h) median (range) 1.5 (0.5–3.0) 4.0 (2.0–6.0) AUC last (ng.h/mL) 175 (129) 456 (249) Distribution The plasma protein binding of mebendazole is 90 to 95%.
The volume of distribution is 1 to 2 L/kg, indicating that absorbed mebendazole penetrates areas outside the vascular space. Metabolism Orally administered mebendazole is extensively metabolized primarily by the liver. Plasma concentrations of its major metabolites (hydrolyzed and reduced forms of mebendazole) are higher than those of mebendazole.
Impaired hepatic function, impaired metabolism, or impaired biliary elimination may lead to higher plasma levels of mebendazole. Elimination Mebendazole, the conjugated forms of mebendazole, and its metabolites likely undergo some degree of enterohepatic recirculation. The apparent elimination half-life after an oral dose ranges from 3 to 6 hours in most patients.
Less than 2% of orally administered mebendazole is excreted in urine and the remainder in the feces as unchanged drug or its metabolites. Specific Populations Pediatric Based on a limited number of blood samples, the pharmacokinetic results following single-dose administration of a 500 mg mebendazole chewable tablet to pediatric patients (age 1 to 16 years) with single or mixed infections of T. trichiura and/or A. lumbricoides indicated that children aged 1 to 3 years have higher systemic exposure than adults.
12.4Microbiology Mechanism of Action Mebendazole interferes with cellular tubulin formation in the helminth and causes ultrastructural degenerative changes in its intestine. As a result, its glucose uptake and the digestive and reproductive functions are disrupted, leading to immobilization, inhibition of egg production and death of the helminth. Antimicrobial Activity Mebendazole is active against: Ascaris lumbricoides Trichuris trichiura Resistance There is a potential for development of resistance to mebendazole.
The mechanism of resistance to mebendazole is likely due to changes of beta-tubulin protein, which reduces binding of mebendazole to beta-tubulin; however, the clinical significance of this is not known.
🧬 Mechanism of Action ▾
12.1Mechanism of Action Mebendazole, a benzimidazole, is an anthelmintic [see Microbiology (12.4) ] .
📦 How Supplied / Storage and Handling ▾
16 HOW SUPPLIED/STORAGE AND HANDLING VERMOX™ CHEWABLE tablets are supplied as 500 mg, round, flat radius-edged white to yellowish chewable tablets that are debossed with "M/500" on one side and "J" on the other side. They are supplied as follows: Bottles of 200 tablets NDC 50458-675-20 Store below 30°C. Keep container tightly closed.
Unused tablets should be discarded 1 month after the bottle is first opened. When the bottle is first opened this Discard After date should be written on the bottle label in the place provided.
📦 Storage and Handling ▾
Store below 30°C. Keep container tightly closed. Unused tablets should be discarded 1 month after the bottle is first opened. When the bottle is first opened this Discard After date should be written on the bottle label in the place provided.
📋 Description ▾
11 DESCRIPTION VERMOX™ CHEWABLE (mebendazole chewable tablets) is an orally administered anthelmintic. Chemically, it is methyl 5-benzoylbenzimidazole-2-carbamate. Its molecular formula is C 16 H 13 N 3 O 3.
Its molecular weight is 295.30. It has the following chemical structure: Mebendazole exhibits polymorphism. The polymorph used in VERMOX™ CHEWABLE is polymorph form C.
Mebendazole is a white to almost white powder. It is practically insoluble in water, in ethanol (96%) and in methylene chloride. Each round, flat radius-edged white to yellowish chewable tablet contains 500 mg of mebendazole and is debossed with "M/500" on one side and "J" on the other side.
Inactive ingredients consist of: crospovidone, magnesium stearate, microcrystalline cellulose, povidone, purified water, strawberry flavor and sucralose. Chemical Structure
💬 Information for Patients ▾
17 PATIENT COUNSELING INFORMATION Advise patients that: VERMOX™ CHEWABLE tablet must be chewed completely before swallowing. For patients who have difficulty chewing the tablet, VERMOX™ CHEWABLE tablet can be turned into a soft mass with semi-solid consistency by adding 2 mL to 3 mL of drinking water to a spoon then placing the tablet into the water, which can then be swallowed. [see Dosage and Administration (2) ] VERMOX™ CHEWABLE tablet must not be swallowed whole. [see Dosage and Administration (2) ] VERMOX™ CHEWABLE tablet can be taken with or without food. [see Dosage and Administration (2) ] Taking VERMOX™ CHEWABLE tablet and metronidazole together may cause serious skin reactions and should be avoided. [see Warnings and Precautions (5.3) ]
🧬 Pharmacokinetics ▾
12.3Pharmacokinetics Absorption Following oral administration of VERMOX™ CHEWABLE 500 mg tablet, the majority of the dose remains in the gastrointestinal tract where it exerts an anthelmintic effect locally. Dosing the VERMOX™ CHEWABLE 500 mg tablet with a high fat meal increases the bioavailability of mebendazole. In the clinical studies conducted in pediatric patients with soil transmitted helminth infections, the majority of these patients were administered VERMOX™ CHEWABLE 500 mg tablets with food.
Mean plasma pharmacokinetic parameters of mebendazole in healthy adult subjects under fasted and fed conditions are summarized in Table 3. Table 3: Mean (SD) Plasma Pharmacokinetic Parameters After a Single VERMOX™ CHEWABLE 500 mg Dose in Healthy Adult Subjects (n=16) Under Fasted and Fed (High-fat Meal) Conditions Parameter Fasted Fed C max (ng/mL) 14.0 (9.17) 56.2 (35.8) T max (h) median (range) 1.5 (0.5–3.0) 4.0 (2.0–6.0) AUC last (ng.h/mL) 175 (129) 456 (249) Distribution The plasma protein binding of mebendazole is 90 to 95%.
The volume of distribution is 1 to 2 L/kg, indicating that absorbed mebendazole penetrates areas outside the vascular space. Metabolism Orally administered mebendazole is extensively metabolized primarily by the liver. Plasma concentrations of its major metabolites (hydrolyzed and reduced forms of mebendazole) are higher than those of mebendazole.
Impaired hepatic function, impaired metabolism, or impaired biliary elimination may lead to higher plasma levels of mebendazole. Elimination Mebendazole, the conjugated forms of mebendazole, and its metabolites likely undergo some degree of enterohepatic recirculation. The apparent elimination half-life after an oral dose ranges from 3 to 6 hours in most patients.
Less than 2% of orally administered mebendazole is excreted in urine and the remainder in the feces as unchanged drug or its metabolites. Specific Populations Pediatric Based on a limited number of blood samples, the pharmacokinetic results following single-dose administration of a 500 mg mebendazole chewable tablet to pediatric patients (age 1 to 16 years) with single or mixed infections of T. trichiura and/or A. lumbricoides indicated that children aged 1 to 3 years have higher systemic exposure than adults.
🔬 Clinical Studies ▾
14 CLINICAL STUDIES The efficacy of VERMOX™ CHEWABLE 500 mg tablets was evaluated in a double-blind, randomized, placebo controlled trial conducted in Africa in 295 pediatric patients between the ages of 1 year to 16 years of age with A. lumbricoides and/or T. trichiura infections. Patients were stratified by worm type and randomized to receive either VERMOX™ CHEWABLE 500 mg tablet (N=149) or placebo (N=146) at the baseline visit (double-blind period). After the 19 day double-blind period, all subjects received a single VERMOX™ CHEWABLE 500 mg tablet (open-label period).
Clinical cure was defined as zero egg count ( A. lumbricoides and/or T. trichiura ) at the end of the double-blind period (Day 19) in patients with positive egg count for the respective worm(s) at baseline. Patients with missing stool sample at Day 19 were considered not cured (Table 4). Table 4: Clinical Response at the End of the Double-Blind Period (Day 19) for A. lumbricoides and T. trichiura Infection Type VERMOX™ CHEWABLE 500 mg All Patients=149 Some patients had mixed infection.
Placebo All Patients=146 Difference Difference in cure rates, expressed in percentages, and based on Mantel Haenszel methods to account for stratification by site. (95% CI) A. lumbricoides N=86 n (%) N=81 n (%) Cure 72 (83.7) 9 (11.1) 72.6 (62.3, 82.7) P-value <0.001 based on the Cochran-Mantel-Haenszel test, controlling for the effect of site. Failure Failures include patients who tested positive for the worm at Visit 3 (Day 19, i.e. test-of-cure).
9 (10.5) 67 (82.7) Missing Patients with missing stool sample at Day 19. 5 (5.8) 5 (6.2) T. trichiura N=124 n (%) N=119 n (%) Cure 42 (33.9) 9 (7.6) 26.2 (16.7, 35.6) Failure 76 (61.3) 103 (86.6) Missing 6 (4.8) 7 (5.8) In patients treated with VERMOX™ CHEWABLE 500 mg, egg count reduction rate at the end of the double-blind period (Day 19) in patients with A. lumbricoides and/or T. trichiura was statistically significant (p<0.001) compared to placebo, 100% compared to 30.0% for A. lumbricoides , respectively, and 81.2% compared to 27.4% for T. trichiura , respectively.
🧪 Nonclinical Toxicology ▾
13 NONCLINICAL TOXICOLOGY
13.1Carcinogenesis, Mutagenesis, Impairment of Fertility In carcinogenicity tests of mebendazole in mice and rats, no carcinogenic effects were seen at doses as high as 40 mg/kg (0.4 to 0.8-fold the MRHD, based on mg/m 2 ) given daily over two years. No mutagenic activity was observed with mebendazole in a bacterial reverse gene mutation test. Mebendazole was mutagenic in the absence of S-9 when tested using a continuous (24 hour) treatment incubation period in the mouse lymphoma thymidine kinase assay.
Mebendazole was aneugenic in vitro in mammalian somatic cells. In the in vivo mouse micronucleus assay, orally administered mebendazole induced an increased frequency of micronucleated polychromatic erythrocytes with evidence suggestive of aneugenicity. Doses up to 40 mg/kg in rats (0.8-fold the MRHD, based on mg/m 2 ), given to males for 60 days and to females for 14 days prior to gestation, had no effect upon fetuses and offspring.
📄 Carcinogenesis, Mutagenesis, Impairment of Fertility ▾
13.1Carcinogenesis, Mutagenesis, Impairment of Fertility In carcinogenicity tests of mebendazole in mice and rats, no carcinogenic effects were seen at doses as high as 40 mg/kg (0.4 to 0.8-fold the MRHD, based on mg/m 2 ) given daily over two years. No mutagenic activity was observed with mebendazole in a bacterial reverse gene mutation test. Mebendazole was mutagenic in the absence of S-9 when tested using a continuous (24 hour) treatment incubation period in the mouse lymphoma thymidine kinase assay.
Mebendazole was aneugenic in vitro in mammalian somatic cells. In the in vivo mouse micronucleus assay, orally administered mebendazole induced an increased frequency of micronucleated polychromatic erythrocytes with evidence suggestive of aneugenicity. Doses up to 40 mg/kg in rats (0.8-fold the MRHD, based on mg/m 2 ), given to males for 60 days and to females for 14 days prior to gestation, had no effect upon fetuses and offspring.
📄 Recent Major Changes ▾
Dosing and Administration ( 2 ) 9/2021
📄 Package Label / Principal Display Panel ▾
PRINCIPAL DISPLAY PANEL - 500 mg Tablet Bottle Label NDC 50458-675-20 Vermox™ Chewable (mebendazole chewable tablets) 500 mg Each chewable tablet contains 500 mg of mebendazole. 200 tablets Rx only USUAL DOSAGE: See package insert for full Prescribing Information. Chew tablets completely before swallowing.
Do not swallow tablets whole. Store below 30°C. Discard after _/_/_.
Discard unused portion 1 month after first opening. USA-AW_112506 © Janssen Pharmaceuticals, Inc. 2016 PRINCIPAL DISPLAY PANEL - 500 mg Tablet Bottle Label
Medicare Part D spend CMS · PART D · 2026 (Q1)
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| NDC identity (package / product / labeler codes) | ✓ Available |
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| Active ingredient / dosage form / route | ✓ Available |
| FDA label (SPL via DailyMed) | ✓ Available |
| Package photos | — Not published for this NDC No photo available yet for this listing. |
| Inactive ingredients (structured) | — Not published for this NDC The labeler did not submit a structured excipient list, or no SPL is available. |
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| Orange Book / therapeutic-equivalence data | — Not published for this NDC Applies only to products approved under an NDA/ANDA; many listings are out of scope. |
| HCPCS J-code billing crosswalk | — Not published for this NDC Most self-administered / retail products have no J-code — that is normal. |
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