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Comfortis Flea Preventative

Product Reviews

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

$98.59 - $117.59
Available Options:
  • Dogs - 5-10 lbs. or Cats - 4-6 lbs., 6 months supply Add to Cart
  • Dogs - 10-20 lbs. or Cats - 6-12 lbs., 6 months supply Add to Cart
  • Dogs - 20-40 lbs. or Cats - 12-24 lbs., 6 months supply Add to Cart
  • Dogs - 40-60 lbs., 6 months supply Add to Cart
  • Dogs - 60-120 lbs., 6 months supply Add to Cart
  • Dogs - 3-5 lbs. or Small Cats, 2-4 lbs., 6 months supply Add to Cart
Rated 4.8 out of 5 by 186 reviewers.
Rated 3 out of 5 by worried about its effectiveness for the first time this product does not seem to be working July 5, 2013
Rated 5 out of 5 by great flea prevention Hated using those gooey gels on the dogs' backs. This pill is so easy, well-tolerated by the pets, and never a flea during the month of coverage. Would highly recommend Comfortis. July 4, 2013
Rated 5 out of 5 by Great drug and easy to use!! This is a great product, but unfortunately my veterinarian has it cheaper at their office. April 17, 2013
Rated 4 out of 5 Wonderful Living in the south where fleas are everywhere this has been a Godsend. Once I started it no fleas at all on dogs or in the house.... October 7, 2012
Rated 5 out of 5 Best Ever! My 110 lb smooth collie is and will always be flea free with Comfortis. Won't ever go back to anything else because this WORKS ALL THE TIME!! September 4, 2012
Rated 5 out of 5 Comfortis for a sensitive dog We brought our "baby" home two and a half years ago. He had Parvo and no tolerance for grains or high carbohydrate dog foods; we searched until we discovered that he did well on a low carbohydrate raw foods diet. Treats from well intended friends and strangers remind us of his sensitive stomach, so we are so happy that he tolerates Comfortis. In addition to being well fed, healthy and happy he enjoys freedom from fleas, a big deal here in Houston! September 2, 2012
Rated 5 out of 5 Comfortis Seems to be working fine. My puppy wouldn't chew it so i had to trick him. He didn't have any adverse reaction. Good so far. Only bad thing is that it kills only fleas and not ticks or any of the other stuff. We will see how it goes. August 27, 2012
Rated 5 out of 5 Comfortis works! I live in south Louisiana, and the family dog is part Labrador Retriever. He loves to dive into anything wet - so Advantage and similar products do not work for him. Comfortis kills the fleas on him, and consequently helps our cats as well. The dog does not like the taste of Comfortis, so we hide pieces of the pill in things he likes - like chicken meat. If he can't smell the pill, he'll gulp it down. August 6, 2012
Rated 5 out of 5 no fleas I have not seen any fleas on my dog since she started Comfortis as a puppy, either in the hot humid summers of coastal South Carolina nor in our unusally warm summer in PA. The vet recommended it because she has a sensitive stomach and can't tolerate some medicines. August 4, 2012
Rated 5 out of 5 Excellent flea control Wonderful product that works much better than Front Line! July 24, 2012
Rated 5 out of 5 comfortis My dog was covered with fleas and kept scratching all the time--I hated for her to sleep with me at night because of the fleas----gave her comfortis and the fleas were falling off dead-in a mater of mins----This is the best---thanks June 3, 2012
Rated 5 out of 5 Comfortis chewable tablets This product works very well for my dogs. I just don't understand why now you have to get a prescription for it. May 29, 2012
Rated 5 out of 5 Great product I have been usesing this product on my two dog who both have flea allergies, and it is the ONLY product that actually works. My toy 5 pound dog only has to have a pill about every 3 months, even though it says once a month. It works longer on her. September 13, 2011
Rated 5 out of 5 jack's free I live in Florida the land of perpetual bugs. I moved to a property very near a lake...tried everthing...Advantage and Fronline...stopped working...I knew shampoos and sprays were useless down here. i was told by comfortis by a neighbor...I tried it and it workd like a charm. I keep if up monthly and never see a flea...I truly wish they would make it for my three cats who are still suffering with advantage. But the comfortis even takes up the slack for them. I will never use anything else as long as I can afford it. September 8, 2011
Rated 5 out of 5 comfortis for fleas My vet(she's the greatest) recommended comfortis for my two yorkies. I could hardly believe my eyes when the fleas just starting falling off them DEAD/ love theastuff September 3, 2011
Rated 5 out of 5 Great Product This product worked great for my Newfie! She was on Frontline for years with no problem and then I noticed fleas! My vet recommended Comfortis and it has worked perfectly since 2009! I highly recommend this product to owners of pets with allergies. It has helped my dog a lot! August 25, 2011
Rated 5 out of 5 Awesome product! My dogs have suffered for years with flea allergies.. This year has been different. This product is nothing short of a miracle.. Love it.. love it! Would recommend to anyone! August 24, 2011
Rated 5 out of 5 Works like a charm! I live in Key West Florida where fleas have become immune to almost every flea med. Comfortis is the only thing that works here. I see dogs in town that have hot spots, I believe are created by flea infestation. My dog had one shortly after moving here. She'd never had one before. After it was treated and she started on Comfortis she's been in perfect health! August 19, 2011
Rated 5 out of 5 You Get What You Pay For My lab developed a re-action to Front Line. My vet changed her to Comfortis. Now there is no re-action, no fleas, and no tics. We live in the hill country of Texas and our dog is exposed to all types of critters and disease carrying wild life---no problems. August 11, 2011
Rated 5 out of 5 helped my great dane feel better We tried the normal things and it wouldn't do much. she was having trouble because of the rash and all because of her allergies to fleas but with in a day she was back to her old self and feeling better because the fleas were no longer biting her. August 6, 2011
Rated 5 out of 5 Hooray The fleas are gone! The fleas have become resistant to the Frontline that we were medicating our dogs with. So happy this one is working. What a nightmare for my dogs and myself. Glad it's over. August 3, 2011
Rated 5 out of 5 The best!! After topical flea and tick medicines almost killed my English Bulldog puppy, the vet had us try Comfortis. Not only does my puppy love the taste, the pill has kept all signs of flea and ticks away. I don't care about how expensive this product is, I will NEVER use another topical product on any animal of mine. Comfortis is the way to go. July 26, 2011
Rated 5 out of 5 Once and done! I thought my dog had a skin infection. I had been using the topical (top-rated) flea prevention. She got fleas!! The vet said it was the second case that day that the dog had fleas from using a topical. Within a couple of hours, she had settled down and was much more comfortable! July 25, 2011
Rated 5 out of 5 Best product I've found for my pekingese We live in southeast Texas and for the last couple of years, the fleas have been out of control. I've pretty much tried all the flea control products out there on my pekingese, Jojo, and this one is the ONLY one that worked for her. I would caution you to watch your dog the first time you administer the pill. My dog is lethargic the first 24 hours - almost identical to the way she is after getting her shots. She mostly sleeps the entire first day, but after that she is back to normal. July 19, 2011
Rated 5 out of 5 happy golden! we live in California where winters are mild-had used Program in the past, but this product worked really fast-vet alerted us to possible nausea in the dog but she was fine-no adverse reactions. Great product! July 9, 2011
Rated 5 out of 5 Awesome product This stuff works GREAT. You can see the fleas come to the surface DEAD!!! Our husky acts as the host of the fleas and kills them in the house and the cat. Will never buy a collar or drop again!!! July 7, 2011
Rated 5 out of 5 Tablets I am trying this product for the VERY FIRST TIME. However, before continuing it. I need to find out how many tablets come in a box for this amount $93.99. I gave this to my 2 cats this afternoon (half tablet each), and I can already tell a difference. Wonderful product! I will continue for sure. June 16, 2011
Rated 5 out of 5 Its works GREAT! My dog has skin allergies (had bad reaction to frontline & any other products) and this comfortis pill really works for my dog with having 2 cats. Usually I start early as March all way to December. We live on a small farm and live nearby the bay. I know it's expensive but it's well worth it!! June 11, 2011
Rated 5 out of 5 If your vet requires a fee to write the script, GET another vet.They are all about the money, not your pet's health and YOUR pocketbook. May 24, 2011
Rated 5 out of 5 Gods gift to dogs and owners This had been the best invention ever. It works amazing! I will never buy anything else. Thank you so much!! Now if only they could make this for cats :) May 21, 2011
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