VetUK Flea and Tick Treatment Plus is a Fipronil based spot-on solution for the treatment of flea, tick and biting lice infestations on cats and dogs. Fipronil is an extremely effective insecticide that works quickly to overwhelm the parasites central nervous system, and will continue to kill fleas for up to 8 weeks in dogs and for up to 4 weeks in cats. It will also remain effective against ticks for up to 4 weeks in dogs and up to 2 weeks in cats.

VetUK Flea and Tick Treatment Plus also contains (S)-Methoprene, which is another insecticide that acts as a growth regulator to inhibit the growth of flea eggs, larvae and their pupae from developing for up to 8 weeks.