Frontline Plus for Cats & Kittens – Flea & Tick Treatment
Total protection against fleas and ticks Fleas aren't just annoying — they're a genuine health problem for your cat. Frontline Plus for Cats is a fast-acting, long-lasting topical treatment that doesn't only kill adult fleas. It breaks the whole infestation...
- Breaks the flea cycle
- Tick & lice defence
- Waterproof formula
- Safe for kittens
Total protection against fleas and ticks
Fleas aren't just annoying — they're a genuine health problem for your cat. Frontline Plus for Cats is a fast-acting, long-lasting topical treatment that doesn't only kill adult fleas. It breaks the whole infestation cycle by targeting eggs and larvae too, so the next generation never hatches — in your cat's coat or in your carpet.
For cats & kittens 8 weeks and older, weighing 1.5 lbs or more.
Full ingredient and material breakdown, sourcing region, and third-party testing notes are printed on the packaging and listed here at launch.
Measure at the widest point and size up if you land between two sizes. Free exchanges within 30 days if the fit is wrong.
Free shipping on orders over $49, otherwise a flat $4.99. Most orders arrive in 2–5 business days. Unused items can be returned for 30 days.
Product details
About this item
- Kills every flea life stage — adult fleas, flea eggs and flea larvae, so an infestation can't rebuild itself
- Kills ticks and chewing lice — including ticks that may transmit Lyme disease, Rocky Mountain spotted fever, ehrlichiosis and anaplasmosis
- Waterproof — stays effective after bathing, water immersion or sunlight exposure
- Two active ingredients — fipronil kills adults, (S)-methoprene stops eggs and larvae developing
- Gentle enough for kittens — approved from 8 weeks, and safe for breeding, pregnant and nursing cats
- No prescription needed — one easy spot-on application per month
Why cat parents choose Frontline Plus
Breaks the flea cycle
Adults, eggs and larvae all get hit — the reason infestations stop coming back instead of just pausing.
Tick & lice defence
Kills all tick life stages plus chewing lice, protecting indoor and outdoor cats alike.
Waterproof formula
Once dry (24 hours), grooming, bathing and rainy adventures won't wash it off.
Safe for kittens
Cleared for kittens from 8 weeks and 1.5 lbs, and for breeding, pregnant or nursing queens.
Six months of protection in one box
Each box contains 6 applicators. One application covers your cat for a full 30 days — half a year of cover, no repeat ordering.
How it works
Frontline Plus is a dual-action formula. Fipronil collects in the oils of the skin and hair follicles, then releases steadily onto the coat — which is why one dose keeps working for weeks.
| Fipronil — kills adult fleas, ticks and chewing lice | 9.8% |
| (S)-methoprene — insect growth regulator; stops eggs and larvae developing | 11.8% |
How to apply
- Open the applicator. Lift and remove the plastic tab, peel back the foil, then hold the applicator upright with the foil side facing you and snap the tip.
- Find the spot. Part your cat's hair between the shoulder blades until you can see skin — somewhere they can't turn around and lick.
- Apply. Place the tip just above the skin and squeeze the entire contents into a single spot. Apply directly to skin, not on top of the coat.
- Let it dry. Avoid touching the treated area until it's fully dry.
- Repeat every 30 days for continuous, year-round protection.
Specifications
| Brand | Frontline (Boehringer Ingelheim) |
| Form | Topical liquid (spot-on) |
| Count | 6 applicators — 6-month supply |
| For | Cats & kittens, 8 weeks+, 1.5 lbs+ |
| Duration | 30 days per application |
| Actives | Fipronil 9.8%, (S)-methoprene 11.8% |
⚠️ Important safety information
- Cat product only. Never use a dog formulation on a cat — the dosages differ and dog products can be dangerous to cats.
- Do not apply more than one dose per cat per month.
- Individual sensitivities are rare but possible. Temporary irritation at the application site can occur; if it persists or worsens, contact your vet.
- Harmful if swallowed. Causes eye irritation. Avoid contact with skin, eyes and clothing. Wash hands thoroughly after handling.
- Children should not apply this product. Keep out of reach of children and pets.
- Read the full label and directions before every use.
This is an EPA-registered pesticide product. It is a violation of federal law to use it in a manner inconsistent with its labeling. "#1 name in flea and tick protection" and "trusted for over 20 years" are manufacturer claims based on data held by Boehringer Ingelheim. Always read the product label before use, and consult your veterinarian with any health concerns about your cat.
Frequently asked questions
Fipronil begins killing fleas within hours of application. You may notice fleas rising to the top of the coat as they die, which is a sign it is working rather than a sign of a new infestation.
No. Frontline Plus for Cats comes in a single strength for all cats over 1.5 lbs, so there is no size chart to work out.
Yes. It is approved from 8 weeks old and 1.5 lbs, and it is safe for breeding, pregnant and lactating queens.
Never. The dosages differ and dog formulations can be dangerous to cats. Only use the product labelled for cats.
Yes, once it is dry. It is waterproof after 24 hours and stays effective after bathing, water immersion or sun exposure.
Applying between the shoulder blades makes this unlikely, but if it happens you may see brief drooling or a bad taste reaction. It typically passes quickly. Contact your vet if symptoms persist.
Yes. Monthly application is the recommended schedule for continuous flea, tick and chewing lice control, particularly where there is a high reinfestation risk or flea allergy dermatitis.
No. It is available over the counter.
Most treatments only kill adult fleas. This one pairs fipronil for adults with S-methoprene to stop eggs and larvae developing, so the next generation never hatches in the coat or your carpet.