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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 201 reviewers.
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
Rated 5 out of 5 I will never use another medication for fleas. We have four dogs, ranging from a 125 lbs lab/boxer mix down to a shih tzu, we started using comfortis when frontline wasn't working on our oldest dog. We moved from the city where we also treated our yard to keep down on fleas, to my father's in the country, needless to say, not only does this work on fleas but when we found a tick on one of the dogs ears, it was dried up and died. We then started watching and sure enough it works also on ticks. I know its only guaranteed on fleas but I swear by it on ticks too. We live in West Virginia and have found that around the end of February we start Comfortis and stop around the end of October, depending on the weather. I love the product and will never use anything else. Although it does cost a little more than other products, it still beats buying and having to try to rid your home of fleas. May 19, 2011
Rated 5 out of 5 LOVE it!!! I've tried every topical Rx flea product for my two Chinese Cresteds and my Doberman, but the fleas kept coming back time and time again. Finally my vet told me that she'd noticed fleas becoming resistant to these prevention medications and recommended Comfortis. Wow! I've been using it for 2 years (and through 2 summers most importantly) and I have seen ZERO signs of fleas; not even a speck of flea dirt. It's pricey, but worth it for my dogs' comfort and especially since I have kids too! May 18, 2011
Rated 5 out of 5 Ivr tried all I'd the other flea prevention pr oduct..this is the only product that has ever worked for any of my 3 babies. Love it!!!l This is the best flea product I've found for my babies& none of them had any side effects from the 1st time they took it. I have an american bulldog rescue 4yrs, a great dane3yrs, & siberian husky/doberman mix 11yrs.no flea issues ast all !!! May 18, 2011
Rated 5 out of 5 Saved my sanity!!! 2010 was the WORST year for fleas. I have 3 dogs and 3 cats and we were overrun by the evil spawn. I spent a fortune on spot treatments, sprays, flea bombs, shampoos, yard treatments- you name it I tried it. I live in Arkansas, the NATURAL state, which, naturally, means if it's a bug it lives and THRIVES here... I was about to lose my mind. I sat on the floor every night with a bowl of soapy water picking them off of my animals. Finally, I read about Comfortis on the internet and decided to try it- I thought I'd died and gone to heaven. Dead, dead, dead.... Every last one of them. Wish they made it for cats and I'd found it before I'd spent all that money, but oh well... the fleas that jumped on the dogs from the cats bit it and before long we were flea free. Peace and happiness is Comfortis in my puppies! May 16, 2011
Rated 5 out of 5 yes! This medication saved my household. I live in Texas where fleas are a year round issue. The topical treatments like Frontline and all lost any effectiveness on the fleas here years ago. Thanks to Comfortis, my dogs are no longer itching and scratching and can come inside the house again. I highly recommend this product for all dogs living in the southern U.S. April 29, 2011
Rated 4 out of 5 Best thing I've found I have a pom and a mini doxy and topicals don't work on either one of them. This is the best thing I've found in a long time. Only thing is I can get it from the vet for $12 a month. I like that price a lot better. April 25, 2011
Rated 5 out of 5 Comfortis works My terrier has been using Comfortis for several months and it has worked wonderfully. It's expensive, but effective. April 3, 2011
Rated 5 out of 5 Fantastic Did not believe this would work either altho the Vet's secretary assured me it would. My Maltese had been on Frontline Plus for 3 months and when I looked today, her tummy was covered with fleas. I gave her the pill (she will eat anything) and a half hour later, the fleas had slowed down and I could get them off but 2 hours later, there were dead ones on her and on the bed. And she isn't digging!! March 28, 2011
Rated 5 out of 5 comfortis works this stuff really works an so happy my vet told me about it last summer an vibac knockout e.s. they gave to spray in the house to help kill the fleas also it work great also i flea free finally buy july an havent had one since living in ky we had fleas really bad in the summer for some reason February 24, 2011
Rated 5 out of 5 After trying several of the name brand flea medications, Comfortis is the only one that keeps the fleas off of my Australian Shepherd. He does NOT like the taste though. However, I just crush the tablet and mix it with a spoonful of peanut butter; he licks up every spec. February 17, 2011
Rated 5 out of 5 Works wonderfully for my 4 dogs We battled fleas for years (Florida climate) and this is the only product that works. Unfortunately it is both costly and typically requires a prescription, something my vet 1) charges a fee to provide and 2) requires an office visit each year before he would be willing to write a prescription. I did a search for "Comfortis" and with little effort found it available! The price is less than anywhere else I have found it too. I love this product for my dogs and can't wait for them to come out with something for the cat that works equally as well. December 16, 2010
Rated 5 out of 5 Love It! My mom told me to try this product because she's seen it on the internet. I didn't believe it would work, and was shocked when it did. I have 6 cats (all indoor) and never had a sign of fleas until I brought my dog home. With him going in and out, I became infested. After the first day on the pill, I haven't seen a single flea since. Excellent product! The fleas jump off of my cats and onto him, killing them. Thanks to one pill a month for my dog, he and my six cats are all flea free. December 9, 2010
Rated 5 out of 5 Wonderful product!!! I have been using Front Line Plus on my 2 Shelties. I thought it was working but when I took one of them in to be neutered they found him to be covered with fleas and his skin was irritated. The vet tech recommended this so I gave both Shelties a dose this morning. They have been a little sleepy but have seen no other side effects. I am just hoping all I see in a couple of hours is dead fleas. December 7, 2010
Rated 5 out of 5 Comfortis is a lifesaver! My dog was on Revolution, but still having a huge problem with fleas. The fleas were starting to appear in my house, and were starting to affect my indoor rabbit which I was not happy with. My vet recommended Comfortis which I tried and within a short time no more scratching, or chewing from my dog. The only thing I found was the first dose lasted about three weeks then he started scratching again, but after the second dose no problems what so ever and he has been on this product almost 6 months. I am very happy with this product. December 2, 2010
Rated 5 out of 5 THE BEST THERE IS!!!!! I've been using it since it came on the market and it's wonderful! kills them dead... no more scratching and now have a very happy dog. It doesn't kill ticks but that's fine with me, I can do a search every day just to make sure he didn't pick any up on our walk however this might be harder for someone who has a dog that lives outside. November 9, 2010
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