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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 217 reviewers.
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
Rated 5 out of 5 miracle cure i have a large F/M Staffordshire terrier who was having hives and scratching like mad. we would comb her and find 1 or 2 fleas, nothing severe, but she would be covered in hives 24/7.she as we found out was allergic to fleas, so one flea bite would cause a very bad allergic reaction.we had to constantly administer a very harsh concoction of 10 mgs of predisone and 50 mgs of benadryl . it would work but she was a zombie and the predisone was harsh on her. the vet said to try the comfortis and we are so glad we did. she has been hive free and of course void of all fleas and her naturally energetic self again , thank you comfortis November 2, 2010
Rated 5 out of 5 Comfortis Tried all other products, cost me a fortune over ten years. My 10 yr old Border Collie and one year old Westie, have NO FLEAS. the product works , it is a bit expensive for both of them, BUT it is worth it..Try it it and you will see no fleas any more.. October 23, 2010
Rated 5 out of 5 2 Wheatens Comfortis is great and works like a charm...it is also much cheaper on other pet sites online...on one site it is $30. cheaper. October 7, 2010
Rated 5 out of 5 awesome WOW...I can't believe I wasted so much money in other stuff that didn't work. I was a little skeptical at first but wow in between 4 hours I found dead fleas on my dog legs and not sign of fleas in the house. Love this product. My only complain is that this product doesn't have the promotion it deserve. Try it a works. September 15, 2010
Rated 4 out of 5 Works great so far, but did have side effect I live in the Alabama heat and the fleas love it (and my dogs). I have two boxers and have tried topical treatmets multiple baths, etc with no luck.. Just got Comfortis a couple days ago and since then I have not seen one flea alive! just lots of dead ones!! I love that... what I didnt like was the lethargy :( My smaller boxer was extremely lethargic after taking his pill, was just totally out of it.. I was a bit scared but saw that this was a noted side effect listed in the instructions so didnt panic.. After a good 24 hours and lots of sleep, he is back to normal! September 9, 2010
Rated 5 out of 5 Tried Everything! Starting last summer our dogs were getting infested, Frontline Plus, Advantix you name it nothing worked. I tried putting stuff in the yard, I tried carpet powders , everything! My mother said they just got Comfortis for their dogs. She got me 1 pill each for our 2 dogs (Yorkie and Pek/Chiahuahua). I fed it to them no problems and within 2 hours there wasn't a single flea on them!! I would give the yorkie a bath and 50+ fleas would always be eating him alive and within 2 hours he'd be infested again! He has been flea free for over 3 weeks. I am completely amazed by this product and is a saving grace. It was embarrassing to have people over because fleas would be everywhere. I highly recommend this and I did watch the dogs for reactions and there wasn't any. As with Biospot, I used that and it caused both my dogs to go into seizures and they had to be rushed to the emergency vet. I highly recommend this product! September 5, 2010
Rated 5 out of 5 Finally something that works This is only flea med that we foun d worked on my Shih tzu. My vet recommended it when it first came out. Before then All other meds would not help but maybe a week. I guess could not get through fur well. Started using this and no fleas. My furbaby is allergic to fleas and gets sick when has them. So we were happy to find this. It is cheaper at my vet also. August 23, 2010
Rated 5 out of 5 Tried everything available for fleas before finding comfortis. This product is GREAT! We haven't seen any fleas for at least two years now. Dogs not scratching. If you have dogs and love them please give them relief from those horrible fleas with Comfortis. They'll be happy and you will too. It's worth every penny. August 8, 2010
Rated 5 out of 5 Good product but cheaper through my vet - I've been using Comfortis for my 17 lb. Jack Russel for a year and it does great. Wanted to begin ordering through PetCare for home delivery but found it to be cheaper through my vet ($73.50). The PetCare price of Heartguard is the same as through my vet so I find absolutely no savings through PetCare. July 21, 2010
Rated 5 out of 5 Works but Program Does too and is cheaper! I had ben using Program for 6 years and absolutely loved it. I was told by my vet this year that they were no longer carrying it. They gave me Comfortis instead. I have blue heelers and have been very pleased with Comfortis however once I figured out that I can buy Program online; I have chose to go back to Program and save atleast $30.00 right off the top. I am very pleased and so is my bank account! July 13, 2010
Rated 5 out of 5 IT WORKS !!!!!! Spent so much money on products that don't wrok. My 16 lb. mutt is alergic to fleas and scratched herself raw, with bald spots that bleed. Within 2 days of using COMFORTIS, no fleas, no itching and Molly is now a HAPPY dog! So am I..... July 12, 2010
Rated 5 out of 5 Stupendously stunning!!! After having fought with fleas from the day my husband brought her home almost four years ago and hearing that my sister-in-law who'd had her prior to us having the same problem, our little Shih-tzu/Maltese mix, who is almost completely white which fleas LOVE, is basking in sweet relief. We've tried Advantage, Advantix, Frontline, spraying the yard, getting rid of the carpet, baths at least once a week, Raid, bombing the house, etc., and nothing would work! We were getting ready to try Revolution, but the vet recommended Comfortis since they carry it and not Revolution. Turns out that our sweet little dog rubs the topicals off, but that's not the case with Comfortis! I had no problem getting her to take it, and she didn't seem to have any side effects other than dead and dying fleas falling off her. The other dogs in our household seem to be okay with the topicals, but I might switch to Comfortis for them as well since it was less expensive with our vet than the topicals are... This stuff is absolutely amazing! July 7, 2010
Rated 5 out of 5 Comfortis = comfort at last! We had been using Frontline which was not working at all. We thought maybe the fleas were just really bad this year. After calling our vet we found out that Frontline has been found defective this year!! She suggested Comforits and said it should take care of the problem. Sure enough, Gracie gobbled the pill right up with her supper and dead fleas were literally falling off of her within 1/2 an hour! Now she can sleep at night and so can we!! July 3, 2010
Rated 5 out of 5 Comfortis is the ONLY way to go! Hi! My name is Joe-Joe (named after the one and only: Joey Tribiani from 'Friends'). I'm a fun lovin' Corgie who lives in Florida where all fleas come to vacation! I WAS an advid Frontline Plus user for years until the fleas became smarter than the treatment. I've been using Comfortis for a couple of years now and I won't use anything else - ya know what I'm say'n? My people are happier and my home is flea free! I encourage the makers of Comfortis to add a treatment for ticks to their product. That would make Comfortis #1 on the market and #1 in my heart! ~ "Hey, How you doin'?" ~ "Get your Comfortis TODAY!" July 3, 2010
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