Comfortis Cat | Petco

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Vet Q & A
Is Comfortis safe for my cat if the box only shows a dog's picture?
Great question and thank for you for providing the pictures! It is not safe to give your cat the Comfortis in a box that only has a picture of a dog on it. That medication is for dogs only. The box that has both the cat and dog on it means that it is safe to give to cats, and be sure to give your cat the dose according to his weight. I hope this helps :-)
Updated on September 24th, 2025
Vet Q & A
I gave my 13lb cat the wrong Comfortis dose. Will it kill fleas?
Thanks for using Petco Pet Education Center, formerly Petcoach! You are correct- Cody will need the 560mg size. It won’t hurt to give the smaller size but it may not be totally effective. Or you can contact your veterinarian and see if you can switch out the dose for the correct size. Good luck and kisses to Cody!
Updated on September 24th, 2025
Health & Wellness
Advantage not working for cat fleas. Can I switch to Comfortis?
Hi there. I think your plan of using Comfortis instead is a good one. If you opt to do this, there's really no need to give the Capstar first, as the Comfortis will start working quickly on its own :) You can go ahead and do this now - the Comfortis should not have any harmful interactions with the Advantage, even if it was only applied a week or so ago.
Updated on September 24th, 2025
Vet Q & A
My cat threw up Comfortis flea medicine. Is it still effective?
Poor Clair! The Comfortis tablet often dissolves quite quickly, but Elanco reps have said that if a cat vomits within an hour of medication administration, the cat should receive another dose. To confirm this information and to report Clair's vomiting, I recommend calling the phone number on the Comfortis packaging.
Updated on September 24th, 2025
Health & Wellness
Why is my feral cat still scratching after Comfortis flea treatment?
I'm sorry you're having such a challenging time with Meowsie. It certainly is good of you to treat a feral cat. Crushing Comfortis and mixing it with food shouldn't cause a problem with its absorption, so I doubt that is your problem. If you are still seeing fleas, you might ask your vet for another recommendation, but Comfortis tends to work well. Unfortunately, when a cat has flea allergies or chronic skin problems, it can take a while for the itching to improve even once the fleas have been treated. I might consider giving her a fish oil supplement daily to help improve her skin and decrease her itching. There are a number of fish oil supplements for cats such as Wellactin ( http://www.welactin.com/?pg=cat ). Good luck! I hope that was helpful. Thanks for using PetCoach.
Updated on September 24th, 2025