I can’t believe I was stupid enough to by this stuff. I have been using revolution for a couple of years now but since this was an outside cat ..by choice.. I decided to use an otc flea product. BIG MISTAKE..I put this stuff on the kitten and it wasn’t 10 minutes later this kitten couldn’t hardly walk..it couldn’t eat or drink, it was lathargic. I brought him in and hoped it would make it thru the night so I could take him to the vet first thing in the a.m. I was lucky ,Brett (the kitten) did make it but it was a night I never want to go thru again. I have given Brett a bath and am keeping him in with me until he gets over this. The vet gave him a capstar tablet, it kills fleas and ticks instantly and told me to wait at least 2 weeks before applying revolution, which I might add kills fleas, ticks,ear mites and worms. I’ll never use another otc flea and tick product again.