FIPROtec Combo Spot-On Cat FIPROtec Combo Spot-On Cat – A spot on containing fipronil and S-methoprene which kills fleas, ticks and biting lice. Prevents flea eggs hatching and larvae developing in the home for six weeks. For cats over 8 weeks of age, weighing more than 1kg. UK authorised veterinary medicine. Beaphar FIPROtec® COMBO Spot On for Cats contains fipronil and the insect growth regulator S-methoprene. It which not only kills adult fleas, ticks and biting lice, but also interrupts the flea life cycle, preventing any exposed eggs and/or larvae from developing in your home for up to six weeks. FIPROtec® COMBO Spot On for Cats kills adult fleas for up to four weeks and ticks for up to two weeks. Suitable for cats over 8 weeks of age and weighing more than 1kg. Suitable for pregnant and lactating queens.