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At a Glance
Comfortis is safe for use in dogs and cats
Prevents flea infestations for a full 30 days
Kills fleas within 30 minutes
This product requires a prescription.

Comfortis

Comfortis is the first beef-flavored chewable that both kills fleas and prevents infestations in your dog or cat for a full 30 days. Comfortis is safe for puppies and kittens as young as 14 weeks. [+]

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Rated 5 out of 5 by 249 reviewers.
Rated 5 out of 5by Best Flea "Fixer" Out ThereThis product works almost instantly, and within a day or two the fleas are gone. For a house infestation I'd imagine whatever time 2 or 3 egg laying cycles takes would take care of, but I don't think we had a full blown infestation. Give comfortis to (2) cats. One loves small dry treats and eats the pill like any other treat. Not sure what people are complaining about size wise, no problems there. The other cat is the typical picky eater, but likes one particular variety of soft food, problem solved. Crush up pill with half a can of soft food and pill is consumed and fleas are gone. Its a tad pricey but you get what you pay for. Ease of use probably depends on each cat obviously, but you're supposed to be the smarter species, not hard to trick a cat with some soft food./ 04/11/2017
Rated 3 out of 5by It works well but tough to get them to eat itThis product saved a feral cat i take care of.He had a bad flea allergy.Only problem is the pill is massive and no matter what food i put it in he knows it right away and 2 licks and walks away.After the 1st time it was almost impossible.Crushed it up as fine as possible and put it in all his favorite wet food.Taste must be awful.Too big 07/27/2016
Rated 5 out of 5by much beter than the oils I have been using Comfortis for years on all my dogs. I put it in their food. No adverse reaction. no messy oily fur like other products. 07/08/2016
Rated 5 out of 5by I highly recommend Comfortis This is the easiest flea prevention medicine I've used for my cat. I just crush it up and mix it with a little wet food. No struggling to hold my cat still, no mess, no worrying about whether or not the medicine is on here he can lick it and get sick like with topical treatments. 07/03/2016
Rated 5 out of 5by Super easy to use, no mess and it works! Having tried numerous products we find Comfortis Brown to be great. We have a 90 lb. 2 year old female weimaraner who has a delicate stomach and sensitive skin. Other topical products have given her rashes and other ingestibles have caused her to vomit. With Comfortis Brown she has no side effects and the product works. We live in Southern California so we usually start flea prevention meds by the middle of April. This year we fell behind and found she had a few fleas on her. After giving her one chewable following her evening meal (she thinks its a treat and loves them!) the next morning the fleas were gone and we have not seen a flea since. We are very active and outdoors regularly with regular interaction with other dogs. The fleas still stay away. 05/26/2016
Rated 1 out of 5by Good for dogs but not finicky catsI just wish this was available as a small pill I could successfully get down my cats throat . I gave up trying and gave comfortis to my neighbor for her dog. 05/03/2016
Rated 5 out of 5by A Miracle!Our little five month old Molly kitty came to us, horribly infested with fleas. She is a long hair, part Persian. NOTHING was helping, including bathing and combing, until we took her to our local Vet and she was given Comfortis. The fleas began to literally fall off of Molly, within minutes! By the time we arrived home, just a few minutes later, Molly's blanket was covered in fleas...100's! NOT a typo! By that very evening, Molly was a different little girl...happier than she had been since we brought her home. THANK YOU, Comfortis!! From a family of believers!! :) 01/30/2016
Rated 4 out of 5by Good product but a little priceyGood product but my dog does not seem to like the taste now. I've used it in the past and he's eaten it no problem. Lately he's not interested. Did you change the taste? 01/11/2016
Rated 5 out of 5by We have used Comfortis for many yearsMy dog has never had fleas and the pill is small and easy to administer. 01/08/2016
Rated 5 out of 5by It's incredible!I've used Frontline for years and haven't been able to figure out why I continue to see flea dirt and scratching. I switched my cat to Comfortis and the fleas literally jumped ship within an hour. No exaggeration or embellishment needed - I have a long-haired cat, and before an hour had passed, they were crawling out of his fur. I was waiting with a flea comb and a vat of hot, soapy water - I know they won't live long after the Comfortis is applied, but I prefer not to take any chances! I collected over 20 over the course of the first couple of hours and haven't seen any fleas - or scratching - since. It's a truly amazing product, and it's so satisfying to SEE the fleas fleeing in terror. 12/28/2015
Rated 4 out of 5by Works, if you can get it in themFirst off, 1, thank heavens it works. AND we've had none of the side effects. That being said, it smells. We had to grind it because it was so too big to swallow. That made the smell worse. Luckily, you can gravy up anything and a dog will eat it. Still haven't figured out how to get them in the cats. You see the dead fleas so you know it works. But I've gone through 4 tablets with the cats and once they get a taste/smell of it they back off. I've tried it in their food, real canned tuna and gray. The pills are too big to shove down their throat. Not sure what to try next. 12/06/2015
Rated 4 out of 5by Good productI started using this when the spot on products were no longer keeping my dog free of fleas and constant scratching. After moving to this, she does less scratching and we have not had any flea issues. I will keep using this product. 11/21/2015
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