I use this on both my cats its excellent. The vet recommended it and its cheaper to buy online with a prescription than from the vets directly. Its specifically good if your cat has a tendency on going into wooded areas where there is a chance of ticks being around. My cats haven't had any flea infestations in their lives, 4 years almost. Have been using this for the past 2 years as it protects from ticks as well as fleas and it can also give some protection from worms.

I applied this to our cat and I'm still combing fleas off him days later. Would not recommend.