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Pyrantel Side Effects

Medically reviewed by Last updated on Apr 6, 2022.

For the Consumer

Applies to pyrantel: oral suspension

Side effects requiring immediate medical attention

Along with its needed effects, pyrantel 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 as soon as possible if any of the following side effects occur while taking pyrantel:


Side effects not requiring immediate medical attention

Some side effects of pyrantel 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:

Less common

For Healthcare Professionals

Applies to pyrantel: compounding powder, oral suspension, oral tablet


Frequency not reported: Nausea, vomiting, diarrhea, abdominal cramps, abdominal discomfort[Ref]

Nervous system

Frequency not reported: Headache, dizziness, drowsiness[Ref]


Frequency not reported: Minor abnormalities of liver function, transient increases in liver enzymes values[Ref]


Frequency not reported: Anorexia


Frequency not reported: Insomnia


Frequency not reported: Fatigue


Frequency not reported: Skin rashes[Ref]

Frequently asked questions


1. "Product Information. Pinworm Medicine (pyrantel)." Reese Chemical Company, Cleveland, OH.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Some side effects may not be reported. You may report them to the FDA.