Proper Use

Drug information provided by: IBM Micromedex

No special preparations (for example, special diets, fasting, other medicines, laxatives, or enemas) are necessary before, during, or immediately after you take pyrvinium.

Use a specially marked measuring spoon or other device to measure each dose accurately. The average household teaspoon may not hold the right amount of liquid.

Pinworms may be easily passed from one person to another, especially among persons in the same household. Therefore, all household members may have to be treated at the same time to prevent their infection or reinfection. Also, all household members may have to be treated again in 2 to 3 weeks to clear up the infection completely. Make sure each family member takes the correct amount, since the dose may be different for each person.

To help clear up your infection completely, take this medicine exactly as directed by your doctor. Read the instructions on the label and follow them carefully. The amount of medicine you need is based on your weight. You must take the exact amount if the medicine is going to work. A second course of pyrvinium is usually required to clear up the infection completely.


The dose of this medicine will be different for different patients. Follow your doctor's orders or the directions on the label. The following information includes only the average doses of this medicine. If your dose is different, do not change it unless your doctor tells you to do so.

The amount of medicine that you take depends on the strength of the medicine. Also, the number of doses you take each day, the time allowed between doses, and the length of time you take the medicine depend on the medical problem for which you are using the medicine.

  • For the oral suspension dosage form:
    • Adults and children: Dose is based on body weight and will be determined by your doctor. It is taken as a single dose and is repeated in 2 to 3 weeks.


Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light. Keep from freezing.

Keep out of the reach of children.

Do not keep outdated medicine or medicine no longer needed.