Cat's Allergic Reaction to Advantage II?

I would call the vet - I've seen some animals have reactions to other flea products (usually the over-the-counter ones) that look more like a burn or a sore on the skin where the stuff is applied that is painful and really bothers them. Usually cats have more serious reactions when the wrong stuff is applied (neurological signs, facial/head twitching) but Advantage (as long as it is what is labeled for cats, not dogs) should be okay. What you are describing does not sound typical and I could give your vet a call.

The pill you can get from your vet is called Cap-Star.

My kitty is also allergic to topical flea preventatives. All the fur at the site falls out and the skin would sometimes scab over. It gets worse over time.

I suggest you do give her a bath. Use baby shampoo, unscented if you can get it. Use lots of the soap and really get it onto her skin as much as you can. Rinse really really well. It will get the stuff off and at least decrease the reaction.

Please, don't ever use topical again. It gets worse each time.

I would bring her to the vet in the morning. They can give a steroid shot to help counter the reaction. That is not a normal reaction to flea medicine.
Revolution is my favorite anti-flea topical medication. It's one of the safer ones and really works. My cats are indoors only and the very rare times they get fleas it never takes more than a couple doses. It kills the eggs as well as the adults.

I would call the vet. Just in case. I would hate for the allergic reaction
to get worse. I'm sorry about your cat. Poor little thing. Good luck.

My cat is also allergic to flea powder and any of that stuff that you put between the shoulder blades. I almost lost her once, she got really ill after an application of the powder. I can also tell that the topical treatments burn her skin, she hates that stuff!
I now give her a pill once a month that costs 18 bucks at the vet, unfortunately I dont know the name of it, but it tastes like a cat treat and she eats it without a problem, however she will sleep for 2 days after she takes it.
It's poison, so it's scary.... but she's fine after that, and no fleas.

Cats do have allergic reactions. Your best plan is to call your vet. Even if your cat doesn't *seem* to be uncomfortable, something's wrong.