Question 1

What is Flumethrin used for?

Accepted Answer

Flumethrin is indicated for: Flea and tick prevention.

Question 2

What routes can Flumethrin be administered by?

Accepted Answer

Available routes: Topical.

Question 3

Which species have cited Flumethrin dosing data?

Accepted Answer

Flumethrin dosing in the ExoticRx formulary covers 2 species: Cat (Domestic), Dog (Domestic).

Question 4

Is Flumethrin a controlled substance?

Accepted Answer

Flumethrin is not federally scheduled as a controlled substance, but is veterinary prescription only in most jurisdictions.

Question 5

What are the warnings or contraindications for Flumethrin?

Accepted Answer

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.

Question 6

What are the side effects of Flumethrin?

Accepted Answer

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.

Question 7

How does Flumethrin work?

Accepted Answer

Synthetic pyrethroid that disrupts sodium channels in arthropod neurons, causing hyperexcitation, paralysis, and death of fleas and ticks on contact.

Species	Route	Dose	Frequency	Evidence	Source
Dog (Domestic)	Topical	0.44–4.5 mg/kg	q8months (collar)	Strong	Seresto product label; FDA openFDA Adverse Event Database
Cat (Domestic)	Topical	0.44–4.5 mg/kg	q8months (collar)	Strong	Seresto product label; FDA openFDA Adverse Event Database

Flumethrin

Drug Class

Routes

Indications

Mechanism of Action

Side effects & warnings

Species with Flumethrin dosing data (2 dose rules)

Evidence levels across 2 dose rules

Backed by a published primary source

Sample dosing (2 of 2 cited rules)

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