FRONTLINE TRITAK For Dogs contains fipronil and (s)-methoprene which are the 2 ingredients in Frontline Plus and then Tritak contains cyphenothrin, and additional ingredient to help with a faster flea kill that also kills flea eggs and larvae, too.

The active ingredients in FRONTLINE ® TRITAK™ For Dogs feature a sustained release formula developed for fast-acting and long-lasting control of fleas, ticks, and chewing lice for up to 1 month on dogs. READ ENTIRE LABEL BEFORE EACH USE. USE ONLY ON DOGS AND PUPPIES OVER 12 WEEKS OF AGE.

What is the difference between FRONTLINE ® PLUS and FRONTLINE ® SPOT ON? Both products kill fleas and ticks on your pet, however FRONTLINE® PLUS has an advanced formula that also stops flea eggs that fall off pets from hatching in your home.

FRONTLINE is usually used as FRONTLINE Spot On, but there are occasions when applying as a spray is more suitable. This can be more difficult to apply, but in some situations is more effective, and there is a longer activation of the treatment.

Summary of Reviews for FRONTLINE Spot On Flea & Tick Treatment Dogs & Cats. 548 out of 589 (93%) customers would recommend this product.

24 hours Frontline starts working once the product has spread over the whole body surface, which can take up to 24 hours after application. Thereafter, fleas are killed within 24 hours and ticks killed within 48 hours.

FRONTLINE Spot On is a topical application for the treatment and prevention of fleas and ticks. It contains the active ingredient Fipronil, which works to over-stimulate the nervous system of the parasite and kill 98-100% of adult fleas within 24 hours; remaining effective for up to 5 weeks in cats and 8 weeks in dogs.

95% are in the environment as flea eggs, larvae and pupae. Seeing fleas after treatment isn't really about how long it takes for flea treatment to work or for fleas to die. It's about the number of life stages in the pet's environment that develop into new fleas and jump on a pet.

Seeing fleas after treatment isn't really about how long it takes for flea treatment to work or for fleas to die. It's about the number of life stages in the pet's environment that develop into new fleas and jump on a pet.

FRONTLINE Plus can control fleas for up to three months, however, if there is a high risk of reinfestation or if the pet has fleas which may cause flea allergy dermatitis, a once monthly application may be needed.

Frontline starts working once the product has spread over the whole body surface, which can take up to 24 hours after application. Thereafter, fleas are killed within 24 hours and ticks killed within 48 hours.

However, this does not mean that the treatment has not worked or that the fleas are immune – the reasons are fairly simple: Fleas are hatching in your home and re-infecting your pet. Your pet picked up a 'hitch-hiker' flea. Treated fleas become more active before they die – making them more visible.