Credelio is a chewable to provide monthly protection against ticks and fleas and may also be used for the treatment of flea infestations. It is suitable for dogs and puppies 8 weeks of age and older, weighing at least 12.1 pounds. This medication starts working in just four hours and provides 100% monthly efficacy against fleas and more than 97% monthly efficacy against ticks. Since this prevention comes in a chewable, makes it easier for you to disguise it in your dog’s favorite food.

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Credelio is a treatment that kills adult fleas and flea infestations. It also control of tick infestations for one month in dogs and puppies 8 weeks of age and older, and weighing 4.4 pounds or greater.

Possible Side Effects

Because this is a new drug, monitor your dog closely while taking this medication. If you have any concerns about your animal while taking this medicine, contact your veterinarian.

Side effects that usually are not serious include:

  • Vomiting, diarrhea, decreased appetite.
  • Increased urination.

Side effects that may be serious or indicate a serious problem include:

  • Vomiting that does not stop.
  • Complete loss of appetite.
  • Tremors, seizures.
  • Difficulty walking 

If you see any of these signs, contact your veterinarian immediately.

Drug & Food Interactions

No adverse reactions were observed from the concomitant use of Credelio with other medications. 


The safe use of Credelio in breeding, pregnant or lactating dogs has not been evaluated. Use with caution in dogs with a history of seizures.

Additional information


4.4-6.0 lb, 6.1-12 lb, 12.1-25 lb, 25.1-50 lb


1 mo, 6 mo