Adams "Plus" Flea and Tick Collar for Dogs and Cats

Risk Level: 
Avoid UseAvoid Use

Flea collar for dogs and cats

Propoxur -- 

Propoxur is considered a "probable human carcinogen" by EPA, [source] and is listed by the State of California as known to cause cancer. Propoxur, like tetrachlorvinphos, is a cholinesterase inhibitor, and has many of the same poisoning symptoms.

  • Toxic to the nervous system
  • Probable Carcinogen
S-Methoprene -- 

S-Methoprene is an Insect Growth Regulator (IGR), meaning that it halts the growth of chitin, the substance that creates the exoskeleton in insects. IGRs are effective against developing insects but not against adult insects with already developed exoskeletons. Because of this, IGRs are used to prevent an extended infestation. Since mammals do not produce chitin, insect growth regulators have little effect on humans. According to EPA S-Methoprene has a very low acute toxicity. [source]

S-Methoprene is listed as a least-toxic chemical control by the Integrated Pest Management Practitioner. It is listed on City and County of San Francisco Integrated Pest Management Program 2007 Reduced-Risk Pesticide List. [source] And it is listed on EcoWise Certified IPM Program Materials List.

  • Safer chemical -- however, all pesticides should be used with caution and in consultation with a veterinarian.
Safer Alternatives: 
  • Wash bedding in hot, soapy water once a week.
  • Vacuum the home once a week. Empty the vacuum bag and dispose its contents.
  • Comb daily with a fine-toothed flea comb and rinse the comb teeth in hot, soapy water between strokes.
  • Look for repellent sprays made with essential oils of lemongrass, cedarwood, peppermint, rosemary or thyme.
  • For severe problems that require chemical intervention, look for lower risk products such as those using Pyriproxyfen, Nitenpyram, Spinosad, S-Methoprene, or Lufenuron as the active ingredient. 
  • For more tips on safer flea and tick management, see How to Control Fleas and Ticks Without Chemicals.