NEW CUSTOMERS SAVE 40% W/AUTOSHIPUse code NEW40 (Up to $30 max. Exclusions apply)
SAVE AN EXTRA $5 - $20 OFFUse code PETS in cart (Exclusions apply)
Kills Fleas |
![]() |
![]() |
![]() |
Repels Fleas |
![]() |
![]() |
![]() |
Kills Flea eggs and Larvae |
![]() |
![]() |
![]() |
Kills Ticks |
![]() |
![]() |
![]() |
Repels Ticks |
![]() |
![]() |
![]() |
Kills and/or Repels Mosquitoes |
![]() |
![]() |
![]() |
Prevents Heartworm |
![]() |
![]() |
![]() |
Other Parasites Information |
![]() |
Kills chewing lice in dogs and puppies and controls mites that may cause sarcoptic mange. | |
Waterproof (shampooing once a week can reduce effectiveness) | NA |
![]() |
![]() |
Safe for pregnant or nursing Pets | Consult with your veterinarian before using this product on debilitated, aged, pregnant or nursing animals. | Consult your veterinarian. |
![]() |
How long does it take to work | Starts killing fleas in 30 minutes, and kills 98-100% of fleas in 12 hours. | Frontline Tritak will quickly and easily get rid of any existing fleas and ticks on your pet . Starts killing ticks in as little as 1 hour | Kills fleas and ticks with the same efficacy as Frontline Top Spot. |
Taste | Topical application | Applied to Skin | Applied to Skin |
Active Ingredient(s) | Spinetoram | Dogs: Fipronil (9.8%), Cyphenothrin (5.2%), (S)-Methoprene (8.8%) Cats: For Cats: Fipronil (9.8%), Etofenprox (15.0%), (S) Methoprene (11.8%) | Fipronil |
RX Required |
![]() |
![]() |
![]() |
Dosage | |||
Usage |
![]() |
![]() |
![]() |
Video | Coming soon | Coming soon | Coming soon |
Vet Review | Fleas are easily the most common external parasite that plague cats throughout the country. Fleas have been shown to not only cause weakness and anemia in affected cats, but also transmit dangerous infectious diseases, including bartonellosis, an also increasing threat to humans. Cheristin is made with the same main ingredient as Comfortis for cats, and acts uniquely on the nervous system of the flea. Unlike flea prevention tablets, Cheristin starts killing fleas within 30 minutes and almost 100 percent of fleas within 12 hours. With the easy to use applicator, this product has been shown to be quite effective for one month. The most common, yet rare side effect I have seen in cats is an allergic reaction or hair loss at the site of application, and even less commonly vomiting and lethargy. It is an excellent and fast acting, effective product with an overall rating of a 4.5 with an ease of administration of a 5. | From one of the most reliable drug companies Merial, makers of Frontline Plus, is Tritak, which was introduced a few years ago, and offers a three prong protection against multiple parasites, including fleas, ticks, chewing lice and mites. This is probably one of the most rapidly effective topical products available, often beginning to kill fleas within 5 minutes of application. The extra insect growth regulator ingredient methoprene allows this product to also kill flea eggs and larvae as well. I have seen excellent results with this product for at least 30 days when it is applied as directed, although I usually recommend that clients not bathe their dogs 2 days before or for 2 days after application. I have seen occasional contact allergic reactions at the application site, consisting of a mild hair loss and/or dermatitis. The rare sensitive pet also may experience digestive upset as well. In my few years of using this product, I have seen only one animal to develop a neurological reaction after application. However the safety record of this product is overall excellent. Because it is so safe and effective in the vast majority of pets it is used, I give this product an overall rating of a 4, with an ease of application of a 4 as well. | This product is a wonderful economic alternative for clients who have used the Frontline product. It contains the same exact main ingredient as Frontline, Fipronil, which has been probably the number one used flea and tick preventative ingredient by veterinarians over decades now. Not only does it kill fleas and many species of ticks that carry Lyme and other diseases, but also can help in controlling scabies mange mites, as well, in those cases. It certainly is a much cheaper alternative to Frontline or Advantage products. Some excellent advantages include it being waterproof, as well as being safe to use in pets as young as 8 weeks of age. There may be a rare skin irritation side effect at the site of application, but other reactions are even more rare. I have occasionally seen digestive upset with this product. I would also not use it in dogs with a history of chronic seizure disorders. Because of its long-term reliability and safety, I give this product an overall rating of a 4.5, with an ease of application of 4.5. |