Flea drops for cats aren't working, what should I do? - briefly
Confirm the product is applied at the proper dose for your cat’s weight and age, and that it has been allowed sufficient time to act; if fleas persist, consult a veterinarian for an alternative or prescription treatment.
Flea drops for cats aren't working, what should I do? - in detail
If topical flea medication applied to a cat does not eliminate the infestation, first verify that the product was used correctly. Confirm the dosage matches the cat’s weight, apply the full dose directly to the skin at the base of the neck, and ensure the cat does not lick the area for at least 30 minutes.
Check the expiration date and storage conditions; heat, moisture, or prolonged exposure to light can degrade the active ingredients.
Assess the cat’s health status. Skin conditions, excessive grooming, or a compromised immune system can reduce efficacy. A veterinarian should examine the animal for allergies, dermatitis, or underlying diseases that may interfere with treatment.
Consider the possibility of flea resistance. Some populations have developed tolerance to common pyrethroids or neonicotinoids. If resistance is suspected, switch to a product containing a different class of insecticide, such as an insect growth regulator (e.g., methoprene) combined with an adulticide, or a prescription-only formulation.
Environmental control is essential. Treat the home simultaneously:
- Wash all bedding, blankets, and fabrics in hot water.
- Vacuum carpets, rugs, and upholstery thoroughly; discard the vacuum bag or clean the canister immediately.
- Apply a household flea spray or fogger targeting eggs, larvae, and pupae, following label instructions.
- Treat any other pets in the household with a compatible flea regimen to prevent re‑infestation.
If after these steps the problem persists, schedule a veterinary appointment. The vet can prescribe oral or injectable flea medications, perform a skin scrape to confirm species, and provide a comprehensive management plan tailored to the cat’s specific situation.