Cat flea and tick treatment: when to treat?
Published on 6/26/2026
How often should you treat a cat for fleas and ticks?
External parasite protection is generally regular, often monthly, but this depends heavily on the product used (some last longer) and the cat's level of exposure. A cat that goes outside in a risky environment (garden, countryside, contact with other animals) needs more sustained protection.
Since the duration of effectiveness varies greatly from one product to another, it is your vet who determines the most suitable frequency and product.
Does an indoor cat need parasite treatment?
Yes, this is a persistent misconception. Even without going outside, a cat can catch fleas: they can be brought in from outside on clothing or shoes, or via another animal in the household. Parasite protection therefore remains relevant, even if the frequency can be adapted for a strictly indoor cat.
Why are ticks a risk for cats?
Ticks don't just bite: they can transmit diseases. The risk is higher during tick season, but in some regions exposure is present all year round. For a cat that goes outside, vigilance and suitable protection are important. If in doubt about an attached tick, ask your vet for advice.
Facts & figures
often monthly — General recommendation for external parasite protection
Source: ESCCAP
Frequently asked questions
Are parasite treatment and deworming the same thing?
No. External parasite treatment protects against external parasites (fleas, ticks). Deworming treats internal parasites (intestinal worms). The two are complementary and follow separate schedules.
Can you use a dog parasite treatment on a cat?
No, never without veterinary advice: some molecules intended for dogs are toxic, even fatal, for cats. Always use a product intended for cats and approved by your vet.