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Praziquantel

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Why has my veterinarian prescribed this medicine?

Praziquantel is an anthelmintic. Anthelmintics are used to treat infections with worms and other types of parasites.

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How do I give this medication?

  • Give this medication to your pet as directed by your veterinarian. READ THE LABEL CAREFULLY.
  • If the medicine is a liquid, measure the dose with reasonable care.
  • This medication may be given with or without food
  • DO NOT give the pet more medicine than directed
  • DO NOT give more often than directed.

What if I miss giving a dose?

In active infections, a second dose is often needed 2 weeks later in order to catch all lifestages of the parasite.  Measures should be taken to prevent re-infection, usually a once monthly treatment.

How do I store this medicine?

  • Keep this medicine out of reach of children.
  • Store this medicine in a cool, dry place at room temperature. Store away from heat and direct sunlight.
  • Do not store this medicine in the bathroom, near the kitchen sink or in damp places. The medicine may break down if exposed to heat or moisture.

 

What are the potential side effects?

  • There are very few side effects when the drug is given at the usual dose.
  • Side effects that may occur include loss of appetite, vomiting, drowsiness, diarrhea in dogs and salivation and diarrhea in cats.
  • Other side effects may occur. If you notice anything unusual, contact your veterinarian.

 

Are there any possible drug interactions?

  • Make sure to tell your veterinarian what other medication you are giving to your pet.
  • Quite often, your veterinarian may prescribe two different medications, and sometimes a drug interaction may occur. In this case, your veterinarian may vary the dose and/or monitor your pet more closely.
  • Contact your veterinarian if your pet experiences any unusual reactions when different medications are given together.

© Copyright 2025 LifeLearn Inc. Used and/or modified with permission under license. This content written by LifeLearn Animal Health (LifeLearn Inc.) is licensed to this practice for the personal use of our clients. Any copying, printing or further distribution is prohibited without the express written consent of LifeLearn. This content does not contain all available information for any referenced medications and has not been reviewed by the FDA Center for Veterinary Medicine, or Health Canada Veterinary Drugs Directorate. This content may help answer commonly asked questions, but is not a substitute for medical advice, or a proper consultation and/or clinical examination of your pet by a veterinarian. Please contact your veterinarian if you have any questions or concerns about your pet’s health. Last updated on Jul 28, 2016.