Quick Facts

• Therapeutic Domain: Addresses pinworm infections caused by the organism Enterobius vermicularis.
• Goal of Therapy: Aids in the physical removal of pinworms from the intestinal tract.
• General Use: Utilized for symptomatic individuals and recommended for treating other family members in close contact to address potential spread.

---

What Reese's Pinworm Treats: Main Uses and Benefits

Reese's Pinworm Medicine is designated for use in the management of pinworm infection, a common intestinal condition caused by the parasite Enterobius vermicularis. The active ingredient, pyrantel pamoate, is an anthelmintic agent that works to address the presence of these worms within the body.

This medication serves as a therapeutic option to assist in the physical removal of the parasitic worms from the intestinal tract. It is typically a component of a comprehensive strategy that includes hygiene measures to minimize the risk of recurrence and transmission within a household setting. Anthelmintic drug products are used for managing this specific condition.

Consultation with a healthcare provider is recommended for definitive diagnosis and guidance, especially if symptoms continue following initial administration or if there are concerns about other types of parasitic conditions. Addressing an infection of this type often involves treating all household contacts concurrently.

Eligibility Profile: Who Can and Cannot Use Reese's Pinworm Medicine

This eligibility information is based strictly on authoritative government regulatory documents and official product labeling for pyrantel pamoate, the active ingredient in Reese's Pinworm Medicine.

Contraindications (Must Not Use)

Population/Condition	Status
Hypersensitivity	Contraindicated (Known allergy to pyrantel pamoate or formulation components)
Intestinal Obstruction	Contraindicated (Citations from comprehensive regulatory-linked references)

Conditional or Restricted Use (Consult a Doctor First)

Population/Condition	Restriction
Age/Weight	Under 2 years old OR less than 25 lb (Use requires physician direction)
Liver Disease	Do not take unless directed by a doctor (Condition-specific eligibility rule)
Pregnancy	Do not take unless directed by a doctor (Safety and efficacy not established in controlled studies)
Lactation	Requires consultation (Unknown if the drug passes into breast milk)

Use of this medicine is only permitted for individuals 2 years of age or older and weighing 25 pounds or more who do not have any listed contraindications or conditions requiring medical consultation. For the restricted populations, the drug's over-the-counter status is revoked, and use must be specifically directed and managed by a healthcare professional.

The official regulatory documentation for the active ingredient, Pyrantel Pamoate, defines a specific and limited profile of documented interactions. These interactions focus on pharmacodynamic effects and the systemic exposure of certain co-administered substances.

A primary restriction is the contraindicated combination with other anthelmintic agents containing piperazine compounds. Co-administration is officially prohibited because it results in a clinically significant pharmacodynamic antagonism, which mutually diminishes the intended therapeutic effect of both medicines.

In the case of other medicinal products, the drug has been officially documented to increase the plasma concentration of theophylline. This exposure modification requires specific attention when both substances are concurrently administered.

Regarding administration constraints, regulatory labels explicitly state that the product can be taken with or without food, including milk or fruit juice. This information confirms that administration timing is not restricted by common dietary components. The official profile also includes a general caution regarding administration to individuals with documented impaired liver function, which is a population-specific consideration for drug exposure.

Interaction Type	Interacting Substance	Official Regulatory Outcome
Pharmacodynamic	Piperazine Compounds	Contraindicated Combination / Antagonistic Effect
Exposure Modification	Theophylline	Increased Plasma Concentration

Selective Neuromuscular Targeting and Paralysis

Pyrantel Pamoate exerts its action by targeting the nicotinic acetylcholine receptors (nAChRs) on the somatic muscle cells of susceptible nematodes. The molecule functions as an agonist, causing the persistent activation of these receptors. This binding initiates an immediate and irreversible depolarization of the parasite's muscle cell membrane. The sustained depolarization forces the worm into a state of spastic (tetanic) paralysis, resulting in the cessation of its motor function and the inability to maintain contact with the intestinal wall.

Localized Action and Passive Systemic Clearance

Due to its poor absorption from the digestive tract, the active drug remains highly concentrated in the intestinal lumen, which is the site of its mechanism. The paralyzed, detached worms are unable to resist the natural propulsive peristaltic movements of the host's bowel. This dependency on host motility leads to the passive physical clearance from the intestinal lumen. The mechanism is restricted to the adult and developing larval stages present in the gut and is structurally non-responsive in certain species, such as the whipworm (Trichuris trichiura).

Administration Guidelines

Reese's Pinworm (Pyrantel Pamoate) is administered via the oral route and is directed for use as a single dose regimen. The specific dose is calculated based on the individual's body weight, following the ratio of 11 milligrams of pyrantel base per kilogram (kg), or 5 milligrams per pound (lb). The total administered dose must never exceed 1 gram (1000 mg) of pyrantel base.

---

Dosing and Administration Conditions

Administration Scope	Labeled Instruction
Route of Administration	Oral
Frequency and Schedule	Single dose only; do not repeat treatment unless directed by a doctor.
Timing in Relation to Meals	May be taken any time of day and administered with or without meals, milk, or fruit juice. Use of a laxative is not necessary.
Preparation Requirements	Liquid Oral Suspension must be shaken well before the dose is measured. A special measuring device should be used for accurate liquid dosing.
Age-Group Rules	Approved for use in adults and children 2 years of age and older. Children under 2 years or under 25 pounds should not be treated unless directed by a doctor.
Special Procedural Conditions	When one individual in a household is treated, the entire household should be treated unless otherwise advised.

---

Procedural Structure

The protocol for using Pyrantel Pamoate requires the user to first accurately calculate the single, weight-based dose, ensuring it does not exceed the maximum allowed limit. The medication is then administered orally at once, with or without food, marking the completion of the treatment course. The labeled instructions dictate that the single administration is the treatment course and should not be repeated without professional guidance, structuring the treatment as a specific, one-time event for the individual and the household.

Reese's Pinworm: Recent Clinical Evidence

The active ingredient in Reese's Pinworm Medicine is pyrantel pamoate, an anthelmintic agent. Research has focused on pyrantel pamoate's use in treating infections caused by the parasite Enterobius vermicularis, commonly known as pinworm, as well as certain other intestinal worms.

Summary of Study Findings

Clinical trials have examined the efficacy and safety profile of pyrantel pamoate. The medicine is classified as a depolarizing neuromuscular blocker. This mechanism of action was explored in studies that evaluated how the agent affects the worms' muscle function, resulting in their subsequent removal from the body.

• Efficacy: Research suggests that pyrantel pamoate, when administered as a single oral dose, is effective in achieving a high cure rate for pinworm infections. Cure rates are typically measured by the absence of pinworm eggs in stool samples after treatment. Repeated dosing after two to three weeks may be considered in some cases, based on clinical findings, to address potential re-infection from hatched eggs.

• Safety Profile: Pyrantel pamoate is minimally absorbed by the body from the gastrointestinal tract, which contributes to its safety profile. Studies documented common adverse events including nausea, vomiting, stomach cramps, and headache. The research population did not typically include individuals with pre-existing liver disease; caution is generally noted for patients with hepatic impairment.

Comparative Evidence

Pyrantel pamoate is one of several drug options available for pinworm infection. Clinical reviews indicate that it is comparable in efficacy to other available treatments, such as mebendazole. Due to its over-the-counter availability and single-dose administration regimen, it is widely utilized for the treatment of pinworm in children (two years of age and older) and adults.

Key Studies & References Pharmacokinetics and Safety Profile of Pyrantel Pamoate: A Review of Clinical Studies

Common questions about Reese's Pinworm (FAQ)

---

Q: How long does it take for Reese's Pinworm Medicine to start working after I take it?

Official information indicates that Pyrantel Pamoate, the active ingredient, works as a depolarizing neuromuscular blocker. This action causes the pinworms to experience spastic paralysis, making them unable to maintain their grip on the intestinal wall so they can be expelled naturally by the movement of the bowel. The official product information does not provide a specific time frame for the onset of effect.

---

Q: If I have liver disease, is it safe to take this medicine?

According to official regulatory warnings, if an individual has liver disease, this product should not be taken unless its use is specifically directed by a physician. This is a crucial safety precaution listed on the drug label.

---

Q: Can I take Reese's Pinworm more than once if I still see signs of infection?

Official product directions mandate that this medication is intended for a single, one-time dose. The regulatory label explicitly states that treatment should not be repeated unless directed by a physician. If pinworms or symptoms are still present after the initial treatment, further consultation is necessary.

---

Q: Does Reese's Pinworm kill the eggs of the pinworm?

The mechanism of action described in official documents focuses on paralyzing the adult and developing larval stages of the worms that are present in the gut. The official recommendation for re-treatment is typically after two weeks, which is often done to address the possibility of re-infection from eggs that may have hatched after the initial dose.

---

Q: Is Reese's Pinworm safe to use while pregnant or breastfeeding?

Official warnings indicate that this product should not be taken during pregnancy unless its use is directed by a physician. Furthermore, regulatory documents state there is no available data regarding whether Pyrantel Pamoate passes into breast milk, and consultation with a healthcare provider is noted as necessary if you are breastfeeding.

---

Q: What should I do if I miss a dose of Reese's Pinworm Medicine?

This medication is administered as a single, one-time treatment, rather than a course of therapy with multiple doses. Therefore, the official dosing instructions do not include a procedure for a 'missed dose.' The product is designed to be administered as a single dose.

---

Q: Can Reese's Pinworm be used to treat other types of intestinal worms besides pinworm?

Regulatory documents indicate that the product is specifically for the treatment of pinworms. If any types of intestinal worms other than pinworms are suspected before or after treatment, consultation with a physician is recommended.

---

Q: What is the recommended treatment for a pinworm infection beyond taking the medicine? (e.g., hygiene practices)

Official regulatory documents include recommendations for hygiene practices to follow after taking the medicine. These typically involve regular hand washing, daily changing of clothing, and cleaning of bedroom areas to help reduce the risk of reinfection.

---

Q: What should I do if a child under two years old accidentally takes Reese's Pinworm?

Official product warnings advise that this, and all, medications must be kept out of the sight and reach of children. In the event of accidental ingestion or overdose, regulatory instructions advise immediately contacting a poison control center.

How to Store and Dispose of Reese's Pinworm?

The storage and disposal of this over-the-counter Pyrantel Pamoate medicine must follow strict regulatory guidelines to ensure stability and safety.

Official Storage Requirements

Requirement Type	Official Labeled Condition
Temperature	Store at controlled room temperature, typically between 15 C and 30 C (59 F and 86 F)
Container	Keep the product in its original container, tightly closed, and protect it from excess heat, moisture, and freezing.
Safety Constraint	It is mandatory to keep the medicine out of the sight and reach of children.

Official Disposal Protocol

Regulatory agencies prohibit discarding this medicine by flushing it down the toilet or pouring it down a drain. Unused or expired medication should be disposed of by following official drug take-back programs or, if unavailable, by sealing it in the household trash after mixing it with an undesirable substance, as defined by the U.S. Food and Drug Administration guidelines.