• Drops for Cats

      The adulticide active ingredient found in Hartz® UltraGuard® brand flea and tick drops for cats is etofenprox. With low acute oral and dermal toxicity in mammals, etofenprox provides a safe and effective active to control fleas, ticks and mosquitoes on cats. (Effective against adult fleas and mosquitoes, and 3 of the 4 tick life stages.)

      The mode of action for etofenprox is similar to pyrethroids but its chemical structure is very different. Etofenprox is:

      • Not a traditional pyrethroid.
      • Unlike pyrethroids, not an ester.
      • An ether, classified as a "reduced risk pesticide".
      • No adverse reactions at doses 5x in dogs, puppies, cats or kittens.
      • Oral LD50 is >42,800 vs >5,000 for phenothrin and vs. 1,500 for pyrethrins.
      • Used in cat/kitten products due to high efficacy and low toxicity.

      Effective flea and tick protection for cats.

      Flea and tick drops can be just as effective on cats as they are on dogs. However, due to the very specific physiology of cats, care must be taken to choose formulas that avoid adverse reactions.

      Pyrethroids are NOT tolerated well by cats. Etofenprox is a new generation active ingredient that is well tolerated by cats. It is different from all of traditional pyrethroids currently available, which are esters. As a non-ester compound, etofenprox has unique chemistry and biological activity that account for its wide margin of safety in cats, as well as dogs. That’s why Hartz® UltraGuard Pro® Flea & Tick Drops for Cats is a uniquely effective combination of etofenprox and (S)-methoprene, two proven active ingredients that are well-suited to felines.

      • Etofenprox, (40.0%) is a proven adulticide that has been shown effective against adult fleas, 3 of the 4 tick life stages, and mosquitoes.
      • (S)-methoprene, (3.6%) a potent Insect Growth Regulator (IGR) that prevents flea eggs from developing, and stops the flea life cycle.

      Efficacy against adult fleas.

      Efficacy of Hartz® UltraGuard Pro® Flea & Tick Drops for Cats has been tested and validated (Table 5). When tested against adult C. felis, UltraGuard Pro for cats exhibited a kill rate of 98% after 2 days. This high performance was maintained through 28 days with 94% mortality of fleas recorded after weekly infestations.

      EPA Guideline 810.3300 - Flea Efficacy
      A study to measure the efficacy of an Adultcide/IGR
      product against an adult C. felis infestation on cats

      Table 5
      Conclusion: The test results from this study show that, after weekly reinfestations, Hartz® UltraGuard Pro® is effective in killing adult fleas for 28 days.

      Efficacy against immature fleas.

      The continuous and sustained performance of Hartz® UltraGuard Pro® Flea & Tick Drops for Cats against pre-adult fleas, C. felis, was recorded as greater than 96% through 38 days.
      (Table 6).

      EPA Guideline 810.3300 - Flea Efficacy
      A study to measure the efficacy of an Adultcide/IGR
      product against an adult C. felis infestation on cats

      Table 6

      Conclusion: The test results from this study show that, after weekly reinfestations, Hartz® UltraGuard Pro® is effective in killing adult fleas for 28 days.

      Efficacy against ticks.

      The efficacy of Hartz® UltraGuard Pro® Flea & Tick Drops for Cats against ticks has also been tested and documented (Table 7). Mortality data collected on day 32 after application showed 90% kill rate of Ixodes scapularis ticks.

      EPA Guideline 810.3300 - Tick Efficacy
      A study to measure the efficacy of an Adultcide/IGR product
      against Ixodes scapularis infestation on cats 

      Table 7

      Conclusion: This study demonstrates that, after weekly reinfestations,
      Hartz® UltraGuard Pro® provides killing efficacy against Ixodes scapularis ticks
      for 32 days post treatment.