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Generic Name: mebendazole (me BEN da zole)
Brand Name: Emverm
Physician reviewed Emverm patient information - includes Emverm description, dosage and directions.
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Drug Information:
Emverm is an anthelmintic (an-thel-MIN-tik) or anti-worm medication. It prevents newly hatched insect larvae (worms) from growing or multiplying in your body. Emverm is used to treat infections caused by worms such as whipworm, pinworm, roundworm, and hookworm. It is also used to treat infections caused by more than one of these worms at the same time. Emverm may also be used for purposes not listed in this medication guide. Follow all directions on your medicine label and package. Tell each of your healthcare providers about all your medical conditions, allergies, and all medicines you use. Learn more

Emverm Side Effects

Emverm Side Effects

Note: This document contains side effect information about mebendazole. Some of the dosage forms listed on this page may not apply to the brand name Emverm.

For the Consumer

Applies to mebendazole: oral tablet chewable

Along with its needed effects, mebendazole (the active ingredient contained in Emverm) may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor immediately if any of the following side effects occur while taking mebendazole:


  • Black, tarry stools
  • chills
  • convulsions
  • cough or hoarseness
  • dark urine
  • fever with or without chills
  • general feeling of tiredness or weakness
  • hives or welts, itching, or skin rash
  • large, hive-like swelling on the face, eyelids, lips, tongue, throat, hands, legs, feet, or sex organs
  • light-colored stools
  • lower back or side pain
  • nausea and vomiting
  • painful or difficult urination
  • pale skin
  • redness of the skin
  • sore throat
  • sores, ulcers, or white spots on the lips or in the mouth
  • unusual bleeding or bruising
  • unusual tiredness or weakness
  • upper right abdominal or stomach pain
  • yellow eyes and skin

Incidence not known

  • Blistering, peeling, or loosening of the skin
  • diarrhea
  • difficulty with swallowing
  • dizziness
  • fast heartbeat
  • joint or muscle pain
  • red skin lesions, often with a purple center
  • red, irritated eyes
  • tightness in the chest

Some side effects of mebendazole may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:


  • Abdominal or stomach pain or upset

Incidence not known

  • Bloated
  • excess air or gas in the stomach or intestines
  • full feeling
  • hair loss or thinning of the hair
  • loss of appetite
  • passing gas
  • weight loss

For Healthcare Professionals

Applies to mebendazole: compounding powder, oral tablet chewable


At the recommended dose, this drug was generally well tolerated; however, patients with high parasitic burdens reported diarrhea and abdominal pain.


Common (1% to 10%): Abdominal pain

Uncommon (0.1% to 1%): Abdominal discomfort, diarrhea, flatulence

Frequency not reported: Nausea, vomiting


Rare (0.01% to 0.1%): Rash

Frequency not reported: Pruritus

Postmarketing reports: Toxic epidermal necrolysis, Stevens-Johnson syndrome, exanthema, alopecia, angioedema, urticaria


Frequency not reported: Anorexia


Frequency not reported: Transient changes in liver function tests, granulomatous hepatitis

Postmarketing reports: Hepatitis, abnormal liver function tests


Frequency not reported: Profound leukopenia, anemia, thrombocytopenia, pancytopenia

Postmarketing reports: Agranulocytosis, neutropenia

Nervous system

Frequency not reported: Weakness, drowsiness

Postmarketing reports: Convulsions/seizures, dizziness


Postmarketing reports: Glomerulonephritis


Frequency not reported: Chills, drug fever, flushing


Postmarketing reports: Hypersensitivity (including anaphylactic reaction, anaphylactoid reaction)

Editorial References and Review

Medically reviewed by BestRx Medical Team Last updated on 1/1/2020.

Source: Drugs.com Emverm