Vermox Side Effects

Generic Name: mebendazole

Note: This page contains side effects data for the generic drug mebendazole. It is possible that some of the dosage forms included below may not apply to the brand name Vermox.

It is possible that some side effects of Vermox may not have been reported. These can be reported to the FDA here. Always consult a healthcare professional for medical advice.

For the Consumer

Applies to mebendazole: oral suspension, oral tablet chewable

As well as its needed effects, mebendazole (the active ingredient contained in Vermox) may cause unwanted side effects that require medical attention.

If any of the following side effects occur while taking mebendazole, check with your doctor or nurse as soon as possible:

Rare
  • Fever
  • skin rash or itching
  • sore throat and fever
  • unusual tiredness and weakness

Some mebendazole side effects may not need any medical attention. As your body gets used to the medicine these side effects may disappear. Your health care professional may be able to help you prevent or reduce these side effects, but do check with them if any of the following side effects continue, or if you are concerned about them:

Less common
  • Abdominal or stomach pain or upset
  • diarrhea
  • nausea or vomiting
Rare
  • Dizziness
  • hair loss
  • headache

For Healthcare Professionals

Applies to mebendazole: compounding powder, oral tablet chewable

General

Since mebendazole (the active ingredient contained in Vermox) is not well absorbed, few systemic side effects are reported. Side effects may be more likely and more severe in patients with underlying liver disease.

Gastrointestinal

Gastrointestinal side effects have included nausea, vomiting, diarrhea, and abdominal pain, especially when the intestinal parasite burden is great.

Hepatic

Increased liver function tests have been associated with mebendazole (the active ingredient contained in Vermox) in patients with hepatic hydatid cysts.

Hepatic side effects have included transient changes in liver function tests and granulomatous hepatitis. These side effects have been reported when mebendazole was taken for prolonged periods and at dosages substantially above those recommended.

Hematologic

Bone marrow biopsy results during mebendazole-associated leukopenia or pancytopenia have revealed hypocellularity. These effects reverse upon drug discontinuation.

Hematologic side effects are unusual and reversible, but may be severe. Profound leukopenia, often accompanied by anemia and thrombocytopenia, has been reported. Pancytopenia and neutropenia have also been reported.

Dermatologic

Dermatologic side effects have included rare reports of alopecia and angioedema. Rash, pruritus, urticaria, and flushing have also been reported.

Other

No evidence of hypersensitivity (eosinophilia, rash, leukocytosis) accompanied the rare reports of drug fever. The fever may have been idiosyncratic or evidence of a reaction to drug-induced tissue necrosis in hydatid cysts.

Other side effects have included chills and drug fever.

Nervous system

Nervous system side effects have been reported rarely. These have included weakness, drowsiness, and seizures.

Disclaimer: Every effort has been made to ensure that the information provided is accurate, up-to-date and complete, but no guarantee is made to that effect. In addition, the drug information contained herein may be time sensitive and should not be utilized as a reference resource beyond the date hereof. This material does not endorse drugs, diagnose patients, or recommend therapy. This information is a reference resource designed as supplement to, and not a substitute for, the expertise, skill , knowledge, and judgement of healthcare practitioners in patient care. The absence of a warning for a given drug or combination thereof in no way should be construed to indicate safety, effectiveness, or appropriateness for any given patient. Drugs.com does not assume any responsibility for any aspect of healthcare administered with the aid of materials provided. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the substances you are taking, check with your doctor, nurse, or pharmacist.

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