Effipro Spot On is an effective treatment for the prevention of fleas & ticks. Each application of Effipro Spot On lasts at least 4 weeks for fleas & 2 weeks for ticks. Fleas & ticks are a widespread & permanent source of risk for all pets. They are a direct & indirect cause of certain disorders in small animals. Both fleas & ticks can infest pets & transmit serious diseases causing skin lesions, pain & infection. They can also transmit tapeworms to pets. If ticks feed on a pets blood they become engorged & they will multiply in the outside environment, not immediately on the pet. & if ticks are not eliminated they may spend between 3 & 10 days on your pet. A one-off treatment to fight fleas & ticks is not sufficient. You should treat your pets regularly throughout the ye