Mebendazole (Emverm): Uses, Side Effects, and Warnings

ImportantThis page is general information, not a prescription. Don't start, stop, or change a medicine without talking to your provider or pharmacist.

Overview

For pinworms, everyone in the household is often treated, and a second dose is given in 2 weeks.

What it's used for

Pinworms
Roundworm, whipworm, and hookworm infections

How to take it

Chew the tablet (or let it dissolve), with or without food.
Wash hands often, keep nails short, and wash bedding and towels in hot water.

Your dose depends on your health and other medicines. Always follow your prescription label, and ask your pharmacist if anything is unclear.

Side effects

Common side effects

Belly pain
Diarrhea
Gas

Call 911A blistering, peeling, or widespread red rash, especially with fever

Call your provider todayFever, sore throat, or unusual tiredness (rare low blood counts)

Call 911Seizure (rare, mostly in young children)

Warnings

Over-the-counter pyrantel (Pin-X) is another pinworm option.

Other medicines, foods, and alcohol

Metronidazole together raises the risk of a serious skin reaction.

Tell your provider and pharmacist about every medicine, vitamin, and supplement you take.

Pregnancy and breastfeeding

Ask your provider, especially in the first trimester.

Missed doses, overdose, and storage

If you miss a dose

It's often one dose, repeated in 2 weeks. If you miss the second dose, take it as soon as you remember.

If someone takes too much

Call Poison Control at 1-800-222-1222 or get help online at poison.org. Call 911 if the person collapses, has a seizure, has trouble breathing, or can't be woken.

Storing it

Store at room temperature, away from heat and moisture (not in the bathroom), and out of reach of children and pets.

Conditions it's used for

Pinworms

Sources

Last updated 2026-11-13.

Mebendazole