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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
Convenient once a month chewable tablet
This product requires a prescription.

Comfortis Flea Preventative

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1) Weigh yourself.
2) Weigh yourself holding your pet.
3)Subtract the two numbers to get their weight.

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Rated 5 out of 5 by 254 reviewers.
Rated 5 out of 5by Works when nothing else willMy poor cat has been through the ringer when it comes to fleas. He's allergic to flea bites, and we found he is allergic to most topical flea medications. We've tried everything from topicals, powders, flea collars, flea baths, and oral tablets. When we found Comfortis, it was a total lifesaver. We never find fleas on him anymore, and although he hates to take pills it is still effective when we crush it up and put it in his food so it's fairly easy to get him to take it. If you've tried everything and nothing will work, I suggest giving this a go! 12/04/2018
Rated 5 out of 5by Works Great.My cat is a finicky eater and won't chew the tablet. I simply break it in half and pill her. Cleared up existing fleas and haven't seen one since. My other cat throws it up so had to switch to Bravecto for her. 08/24/2018
Rated 3 out of 5by Sorta works...The first appication seemed to work for a few weels and then it wore off and Scooter was back to scratching. I gave him a bath and a few fleas washed off of him. Gave another dose and same thing, he was good for a few weeks and now after a bath he has critters again. Not sure if this is old product and less potent or lesser quality. Either way the monthly dose is incorrect and that these prices...Im disappointed. 08/22/2018
Rated 5 out of 5by Comfortis Great and SafeComfortis Great and Safe 06/22/2018
Rated 5 out of 5by Easy to give & IT WORKSI've had animals all my life and have tried all kinds of flea preventatives. This was a little more money than I really wanted to spend, but it was really, really worth it! Works like a charm right away, works as advertised without side effects for all 3 of my dogs (two small dogs, 1 large senior dog) and it was easy to administer. No greasy oily stuff, just a tablet that two of them even ate willingly! Love this product. Wish it was more affordable, but a whole year without fleas is pretty awesome, too. 01/15/2018
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
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