How long do flea drops for cats last? - briefly
Flea spot‑on treatments typically protect a cat for roughly 30 days after a single application. Duration can differ slightly among brands and depending on the animal’s weight.
How long do flea drops for cats last? - in detail
Flea spot‑on products for felines are topically applied liquids that spread across the skin, creating a protective layer that kills or repels adult fleas and, in many formulations, immature stages. Common active ingredients include imidacloprid, selamectin, fipronil, and fluralaner; each interferes with the nervous system of the parasite, leading to rapid death.
The protective effect typically endures for about one month. Most manufacturers state a 30‑day interval between applications, and clinical studies confirm sustained flea mortality throughout that period. Some newer formulations extend coverage to 12 weeks, but the majority of widely used products remain on a 4‑week schedule.
Factors that can shorten or lengthen the effective period:
- Cat’s weight class (dosage is weight‑specific)
- Health status (skin conditions, severe allergies)
- Frequency of bathing, swimming, or heavy grooming
- Coat thickness (dense coats may impede distribution)
- Ambient temperature and humidity (extreme conditions affect chemical stability)
- Development of resistance in local flea populations
Brand labels provide precise intervals. For example, a product containing imidacloprid is marketed for 30 days, while a fluralaner‑based spot‑on claims up to 12 weeks of protection. The label also notes the need to apply to a dry, hair‑free area on the back of the neck to ensure optimal absorption.
To maintain continuous protection, apply the next dose exactly at the end of the stated interval, even if no fleas are observed. Observe the cat for signs of irritation or loss of efficacy; if fleas reappear before the next scheduled application, consult a veterinarian for alternative treatment or a possible resistance issue.
In summary, most flea spot‑on treatments for cats provide a month of reliable control, with specific products offering longer intervals. Duration depends on the active ingredient, cat characteristics, and environmental conditions; adherence to manufacturer guidelines ensures maximal effectiveness.