Written for parents and caregivers and checked against CDC and National Library of Medicine guidance. Refreshed October 2026. General education only; your child’s doctor or pharmacist should confirm any medicine and dose.
It is 11 p.m. Your five-year-old has been asleep for two hours, and now she is awake again, crying and scratching her bottom. Last week it was the same. You grab a flashlight, take a careful look, and spot something you did not want to see: a tiny white thread, maybe a quarter inch long, wriggling near the skin. Pinworms. Within a minute you are searching on your phone, and the first question is whether albendazole for pinworms actually works.
Yes, it does. The CDC lists albendazole as one of three standard pinworm treatments, alongside mebendazole and pyrantel pamoate. All three kill the adult worms. None of them kill the eggs, which is why the plan is always two doses, two weeks apart. And because pinworms jump so easily from person to person, the CDC advises treating everyone in the household and any caregivers at the same time, then following a strict cleaning routine.
Think of this article as your household battle plan: what you are fighting, which medicine to pick, how to confirm the diagnosis, and exactly what to do with the sheets, the nails and the bath schedule for the next week.
Pinworm basics in 60 seconds
The pinworm, Enterobius vermicularis, is a small, thin roundworm that lives in the lower intestine. According to the CDC’s pinworm overview, it is the most common worm infection in the United States. It shows up most often in preschool and school-age children, in people living in institutions, and in the family members and caregivers of anyone already infected.
The night shift
Here is the cycle in plain terms. While a person sleeps, female pinworms crawl out through the anus and lay eggs on the skin around it. That movement causes the trademark itch, which is usually worst at night. The eggs become infectious within about two to three hours, the CDC says.
Autoinfection: the loop that keeps it going
The child scratches, eggs collect under the fingernails, and later those fingers go into the mouth. The swallowed eggs hatch in the intestine, grow into adults, and the cycle restarts in the same person. This is called autoinfection, and it explains why pinworms can hang on for months without treatment.
Spreading to everyone else
Eggs also land on pajamas, sheets, towels, toys, toilet seats and doorknobs. The CDC notes they can survive on surfaces for two to three weeks if not cleaned away. Brothers, sisters and parents pick them up on their hands and swallow them. Airborne spread from shaking out bedding is possible but rare.
What it is not
Pinworms are not a sign of a dirty home or poor parenting. Any child who goes to daycare or school can catch them. Pets do not carry human pinworms, so there is no need to treat the dog. And while the itch is miserable, the infection is usually mild. Many people have no symptoms at all. For a broader look at how other worm infections show up, see our guide to the signs of intestinal worms.
How albendazole for pinworms stacks up
All three standard medicines work by targeting the adult worm, though in different ways. Albendazole and mebendazole belong to the benzimidazole family; they block the worm’s ability to take up glucose, so it starves and dies. Pyrantel pamoate paralyzes the worm, and the body passes it out. If you want the deeper chemistry, our explainer on what albendazole is covers how the drug works.
The table below uses the doses the CDC lists in its clinical overview for health professionals. They are general reference points only; your child’s clinician or pharmacist confirms the right medicine and amount.
| Feature | Albendazole | Mebendazole | Pyrantel pamoate |
|---|---|---|---|
| CDC-listed dose | 400 mg by mouth, once, repeated in 2 weeks | 100 mg by mouth, once, repeated in 2 weeks | 11 mg/kg by mouth (max 1 g), repeated in 2 weeks |
| How to get it in the US | Prescription; pinworm use is off-label | Prescription (chewable tablets) | Over the counter (liquid, capsules, chewables) |
| Food | CDC: take on an empty stomach for pinworm | Can be chewed; ask your pharmacist | Can be taken with or without food |
| How it works | Starves the worm (blocks glucose uptake) | Starves the worm (same drug family) | Paralyzes the worm |
| Kills eggs? | No | No | No |
| Young children | CDC: safety under 6 not certain, though studies down to age 1 suggest it is safe; campaigns have used reduced doses under 6 | Limited data under age 2; WHO lists it for children over 2 | WHO allows use from age 1 in mass campaigns |
| Weight-based? | Fixed dose in CDC table | Fixed dose | Yes, by weight |
So which is best?
All three are considered effective. In practice, the choice often comes down to access, age and cost:
- Pyrantel pamoate is the one you can buy at a US pharmacy tonight without a prescription. It is a common first step for families, though you still want a doctor involved if symptoms persist or a child is very young.
- Mebendazole is the classic prescription choice for pinworms in the US and many other countries.
- Albendazole is widely used around the world for pinworms and other intestinal worms. In the US, its FDA approval covers hydatid disease and neurocysticercosis, so a doctor prescribing it for pinworm is using it off-label, which is legal and common when guidelines support it.
How strong is the evidence for albendazole specifically? Small studies have reported very high cure rates. One Brazilian study of 29 children given a single dose of 10 mg/kg reported a 100% cure rate with good tolerance. That is a small trial, so it should be read as supportive rather than definitive. The bigger reason albendazole is trusted is that it is on the CDC’s short list and has decades of global use. For a full head-to-head of the two benzimidazoles, see albendazole vs mebendazole.
A note on dosing for children
Please do not split adult tablets or guess at a child’s dose. Tablet strength, the child’s age and weight, and whether a reduced dose is appropriate are decisions for the prescriber or pharmacist. Our guide to albendazole dosage for children explains how those decisions are typically made.
Diagnosis: the tape test
Sometimes you will see a worm directly, like the parent in our opening scene. More often, the doctor will ask for a tape test. There is no blood test for pinworms, and stool samples usually miss them because eggs are laid on the skin, not in the stool. The CDC’s diagnosis guidance and MedlinePlus’s pinworm test page describe the steps.
Step by step
- Get supplies the night before. Clear cellophane tape (about an inch long), a zip-top bag, and a glass slide if your clinic gives you one. Some offices hand out ready-made pinworm kits; if so, follow the kit’s directions.
- Do it first thing in the morning. Before your child bathes, uses the toilet or gets dressed. Eggs laid overnight are still on the skin.
- Press, don’t wipe. Gently spread the buttocks and press the sticky side of the tape firmly against the skin around the anus for a few seconds.
- Transfer it. If you have a slide, stick the tape sticky side down onto the slide. Otherwise fold it or place it as your clinic instructs.
- Seal it. Put the tape or slide into the plastic bag and close it.
- Wash your hands well. Scrub with soap and warm water and avoid touching your face during the process.
- Repeat for three mornings. The CDC recommends three mornings in a row because eggs are not always present every day.
- Drop off the samples. The lab or clinic looks for eggs under a microscope.
Other clues the doctor may use
A clinician may check under the fingernails for eggs, since scratching collects them there. You can also look for worms around the anus about two to three hours after your child falls asleep, using a flashlight. Seeing a live worm is often enough for a diagnosis.
The two-dose rule: why albendazole for pinworms is never one-and-done
This is the single most common reason pinworm treatment “fails.” Families give one dose, the itching stops in a few days, and they assume the job is done. Two or three weeks later, the itching is back.
Here is why. The medicine kills the adult worms living in the gut on the day you take it. It does nothing to eggs that are already in the intestine, on the skin, under the nails, or on the bedsheets. Over the next couple of weeks, some of those eggs get swallowed, hatch and grow. If you give the second dose two weeks later, you catch that new generation before it matures and lays more eggs.
Mark it on the calendar now. Dose one today, dose two in 14 days, for every person being treated. Set a phone reminder before you close this page.
How fast will symptoms ease?
Many families notice the night itching improving within a few days of the first dose, as adult worms die and are passed in the stool. You may even see dead worms in the toilet. The skin around the anus can stay irritated for a little longer, especially if there has been a lot of scratching. Our article on how long albendazole takes to work goes into the timeline in more detail.
Treating the whole household
The CDC’s family advice is clear: treat the infected person, their caregivers and other household members at the same time. If only the itchy child is treated, a symptom-free sibling or parent can quietly hand the infection right back.
Who counts as “household”?
- Everyone who sleeps in the home, including adults who show no symptoms.
- Regular caregivers, such as a grandparent or nanny who bathes the child or changes diapers.
- Children who share a bed or bedroom with the infected child.
The exceptions are people for whom a medicine may not be appropriate without a closer look: pregnant women, babies and toddlers under 2, and anyone with significant health conditions or other medicines. Ask the doctor to decide for each of them individually. Different family members might even get different medicines, for example pyrantel for a toddler and albendazole or mebendazole for older children and adults.
Tell the school or daycare?
Children with pinworms generally do not need to stay home. The CDC notes repeat infections are common in childcare centers and schools, so a quiet heads-up to the teacher can help them reinforce handwashing. No one needs to share a name; many daycares simply send a general hygiene reminder home.
The 7-day cleaning and hygiene plan
Medicine handles the worms inside the body. Cleaning handles the eggs outside it. The plan below is built from the CDC’s prevention steps, which include morning bathing, frequent changes of underwear and bedding, short nails, and hot-water laundry of at least 130°F. The CDC says everyone in the household should keep these habits for two weeks after the last dose, so treat this week as the intensive start, then keep the daily habits going.
| Day | Main jobs | Daily habits (every day) |
|---|---|---|
| Day 1 (first dose) | Give the first dose to everyone being treated. Trim all fingernails short and scrub under them. Strip every bed and wash sheets, pillowcases, pajamas and towels in hot water (130°F or higher); dry on high heat. Do not shake bedding. | Morning shower and fresh underwear; handwashing after the toilet and before meals |
| Day 2 | Wipe toilet seats, flush handles, faucets, light switches and doorknobs. Put out a separate towel for each person and stop sharing washcloths. | Morning shower; clean pajamas at night; snug underwear under pajamas to discourage scratching |
| Day 3 | Wash bath toys and hard toys that go in the mouth. Run soft toys through a hot dryer cycle if the label allows. | Morning shower; hands washed after diaper changes |
| Day 4 | Change bedding again for the infected child. Vacuum bedroom floors and rugs rather than sweeping, which can stir up eggs. | Morning shower; showers instead of tub baths; siblings bathe separately |
| Day 5 | Re-check and trim nails. Talk with kids about not biting nails or sucking thumbs. | Morning shower; fresh underwear |
| Day 6 | Wash towels and washcloths in hot water. Wipe down the bathroom again. | Morning shower; hands before snacks |
| Day 7 | Change all bedding. Review the calendar: second dose is due on day 15. | Keep all daily habits going through two weeks after the second dose |
Why the morning bath matters so much
Eggs are laid overnight. A shower right after waking washes them off before they get onto hands, clothes and furniture. The CDC favors showers over tub baths because bath water can carry eggs around. Children should bathe separately during treatment.
What you can skip
You do not need to steam-clean the whole house, throw away mattresses, or bleach the walls. Pets do not need treatment. Focus on the things hands touch, the things the child sleeps on, and the fingernails. That is where the eggs are.
Pinworms in pregnancy, toddlers and adults
During pregnancy
Pinworms are common in mothers of young children, so pregnant women catch them too. The CDC notes that the safety of the three pinworm drugs has not been studied in pregnant women. Its guidance is that treatment can be considered if the infection is affecting the pregnancy, for example through weight loss or sleeplessness, but should be held until the third trimester. In the meantime, the hygiene steps above work without any medicine and can be enough to break the cycle. Never start albendazole during pregnancy without talking to your obstetrician; see our full article on albendazole during pregnancy for the details.
For breastfeeding, the CDC says albendazole passes into breast milk only in small amounts, and the World Health Organization supports a single dose in breastfeeding women.
Toddlers and babies
For children under 2, the CDC asks doctors and parents to weigh the risks and benefits of any pinworm medicine. Data are limited for very young children. Toddlers in diapers also spread eggs easily, so caregivers should wash hands carefully after every change. Call your pediatrician before giving anything to a child under 2, including over-the-counter pyrantel.
Adults
Adults usually catch pinworms from children, and many have no symptoms. Treatment is the same as for older children. Adults who live alone with repeated pinworm infections, or who keep getting reinfected after careful treatment, should see a doctor to look for a source, such as close contact with children in another home or a workplace setting like a daycare. Some women develop vaginal itching or irritation when worms wander from the anal area; mention this to your doctor so it is not mistaken for a yeast infection.
Why pinworms keep coming back
Recurrence is extremely common and almost never means albendazole for pinworms, or any of the other drugs, stopped working. Usually one of these is behind it:
- The second dose was skipped or given too early or too late. Two weeks is the target.
- Not everyone was treated. A symptom-free family member kept the eggs circulating.
- Hygiene slipped after the itching stopped. The CDC asks families to keep the routine for two weeks after the final dose.
- Reinfection from outside. Daycare, school, a cousin’s house, a sleepover. The CDC notes repeat infection rates are high in group settings.
- Nail biting or thumb sucking. These habits move eggs straight to the mouth.
- Wrong diagnosis. Not every itchy bottom is pinworm. Eczema, irritant dermatitis from wipes or soaps, yeast, or hemorrhoids in adults can look similar.
If pinworms return, the usual approach is to repeat the full two-dose course for the whole household and tighten up the cleaning routine. If they keep returning despite that, your doctor may confirm the diagnosis with tape tests, review who else might be infected, or choose a different medicine. In settings like institutions, the CDC notes that treating everyone at once and repeating in two weeks can be effective.
When to see a doctor
Pinworms are rarely dangerous, but some situations call for a visit rather than a pharmacy run:
- The child is under 2, or the patient is pregnant or breastfeeding.
- You are not sure it is pinworm, or a tape test is needed.
- Itching continues after two full courses with good hygiene.
- The skin around the anus is red, oozing, crusted or painful, which can mean a bacterial skin infection from scratching.
- A girl or woman has vaginal itching, discharge or pain.
- There is significant belly pain, weight loss, blood in the stool, or poor sleep that is affecting school or daily life.
- Anyone in the family has a medical condition or takes other medicines that could interact.
If a child accidentally swallows extra tablets, call Poison Control at 1-800-222-1222. Call 911 for trouble breathing, swelling of the face or throat, or a child who is very hard to wake.
Frequently asked questions
Does one dose of albendazole cure pinworms?
One dose kills the adult worms but not the eggs. That is why the CDC recommends a second dose two weeks later to catch any worms that hatched in between. Without that second dose, the infection often returns.
Can I buy albendazole for pinworms over the counter in the US?
No. Albendazole requires a prescription in the United States. The over-the-counter pinworm option in US pharmacies is pyrantel pamoate. Avoid unverified online sellers; ask your doctor or a licensed pharmacy instead.
Should albendazole for pinworms be taken with food?
The CDC’s pinworm guidance says to take it on an empty stomach. That keeps more of the drug in the gut where the worms live. This differs from long courses for tissue infections, where food is used to increase absorption, so follow your prescriber’s instructions.
Does everyone in the house really need medicine?
The CDC’s family guidance says to treat household members and caregivers at the same time, because people without symptoms can still carry the infection. Pregnant women and very young children need an individual decision from their doctor.
How long do pinworm eggs live on sheets and toys?
The CDC says eggs can survive on surfaces for two to three weeks if they are not cleaned. Hot-water laundry at 130°F or higher, a hot dryer and regular wiping of shared surfaces remove them.
Is albendazole or mebendazole better for pinworms?
Both are on the CDC’s list and both are considered effective. Choice often depends on availability, a child’s age, cost and the prescriber’s experience. Either way, the two-dose plan and household hygiene matter just as much as the drug.
