ExoticRx · exoticrx.com/drugs/flumethrin
US brand names:Seresto(component), Bayticol
Flumethrin is dosed at 0.44–4.5 mg/kg Topical q8months (collar) in cats, per Seresto product label; FDA openFDA Adverse Event Database. Verify against current literature before clinical use.
Synthetic pyrethroid that disrupts sodium channels in arthropod neurons, causing hyperexcitation, paralysis, and death of fleas and ticks on contact.
Highly toxic to cats when applied as pour-on formulations (not collar). Toxic to aquatic organisms. Contact dermatitis possible. Seresto collar form is generally safe for dogs and cats.
Species references:All Cat (Domestic) drugsAll Dog (Domestic) drugs
Each ExoticRx dose rule is graded by the strength of its primary evidence — see the editorial process.
A dog/cat sample is shown here. Cited dosing for all 2 species — reptiles, birds, pocket pets, livestock, and equine — is free on the per-species pages above. Pro adds the weight-based calculator for every species.
Upgrade to Pro or Student to unlock the full dose ranges and frequency for every species. The drug's mechanism, warnings, indications, and cited sources are free to read.
View PlansSource citations and evidence levels available on the live page. Reference only — verify against current literature before clinical use.