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 |
![]() |
![]() |
Prevents Development |
Kills Ticks |
![]() |
![]() |
![]() |
Repels Ticks |
![]() |
![]() |
![]() |
Kills and/or Repels Mosquitoes |
![]() |
![]() |
![]() |
Prevents Heartworm |
![]() |
![]() |
![]() |
Other Parasites Information | Kills Chewing Lice | Kills chewing lice. | Protects against heartworms, fleas, roundworms, hookworms, whipworms and tapeworms. |
Waterproof (shampooing once a week can reduce effectiveness) |
![]() |
![]() |
N/A |
Safe for pregnant or nursing Pets |
![]() |
![]() |
The safety of Sentinel Spectrum has not been evaluated in dogs used for breeding or in lactating females. |
How long does it take to work | Kills fleas and ticks with the same efficacy as Frontline Top Spot. | Starts killing fleas and ticks in as little as an hour! | Begins to work Immediately, |
Taste | Applied To Skin | Applied to skin | Beef-flavored chewable |
Active Ingredient(s) | Fipronil | fipronil & etofenprox | Milbemycin oxime, lufenuron, and praziquantel. |
RX Required |
![]() |
![]() |
![]() |
Dosage | |||
Usage |
![]() |
![]() |
![]() |
Video | Coming soon | Coming soon | Coming soon |
Vet Review | I recently completed a small clinical trial using the Flea 3X topical product for cats. And I must say that the initial reports on the safety and efficacy of this product has been excellent. With the main ingredient being the tried and tested fipronil, this product is very effective in controlling fleas, ticks and chewing lice. Clients have loved the economic savings of this generic alternative product to Frontline. It is also manufactured exclusively in the United States, as well as carrying the trustworthy and reliable 1-800-PetMeds brand on the packaging and label. Thus far, clients have reported back that fleas and ticks are killed very rapidly, and that protection lasts for up to several weeks. I therefore can highly recommend this product to all of the feline guardians as a wonderful and economic alternative to more expensive topical products on the market. | This similar product in cats offers many of the same benefits of the dog product in killing mosquitoes, fleas, ticks and lice within an hour. Like Flea4X Plus product, most of the parasites do not have the bite the pet to be effective and are killed on contact. This helps minimize risk of allergic contact reactions of the pet on exposure to these parasites. As with Flea4x Plus, I give this product an overall review of 4 with an efficacy and ease of use of a 4.5 | There is an outstanding new comprehensive internal and external parasite control product called sentinel spectrum, which combines 3 excellent worming medications that treat and prevent a wide variety of parasites from heartworms, intestinal worms ranging from tapeworms to whipworms, as well as controlling flea infestations. That is 6 types of parasites controlled with one pill. That is a wonderful benefit of this product, along with the tastiest beef flavored tablet. The only down side to this product in my experience and opinion is that it does not kill or repel fleas, but breaks the flea life cycle by preventing adult fleas from laying eggs, as well as killing the eggs. Adult fleas still may bite your dog, which may cause allergic dermatitis in some sensitive animals. I have also seen occasional pet vomit on this product, which is usually avoided by giving with a meal. A wonderful benefit over topical parasite control measures is that by combining all of the wonderful ingredients into a pill formulation prevents exposure of the humans in the household to chemical pesticide residues. I give this product an overall rating of a 4, with a taste of 4 and ease of use of a 5. |