How long does the Barс flea medication work for cats? - briefly
The Barc flea treatment protects cats for roughly four weeks after a single application. Re‑treatment is recommended once the 30‑day period has elapsed.
How long does the Barс flea medication work for cats? - in detail
The Barc flea medication for felines provides protection that lasts up to four weeks after a single application. The active ingredient, typically a combination of fipronil and (S)-methoprene, spreads across the skin and haircoat, killing adult fleas and preventing the development of eggs and larvae.
Key points regarding the duration of action:
- Initial kill: fleas are eliminated within 12 hours of exposure.
- Ongoing control: new fleas that bite the cat are killed within 6 hours for the entire four‑week period.
- Prevention of reproduction: the insect growth regulator disrupts the life cycle, stopping eggs from hatching throughout the treatment window.
Factors that can influence effectiveness include the cat’s body weight, health status, and exposure to water or heavy grooming. Over‑dosing or applying the product to a cat outside the recommended weight range may shorten the protective period.
If a flea infestation persists after the expected four weeks, a repeat application is advisable, following the product’s label instructions. Veterinary consultation is recommended for cats with skin conditions, allergies, or concurrent medications, as these may require adjustments to the treatment schedule.