I hate to put in a word for Advantage because I'm usually a skeptic when it comes to prescription-only stuff, but this is one that I 100% support. It's in the locked cabinet in agriculture stores or by script from your vets office, but I believe it's
definitely worth the price (about $50 for a six-pack). Max, the indoor/outdoor cat, often used to bring fleas in and share them with the other four. Everybody gets itchy and nothing I've ever tried (read: everything) worked except this. Because I have five cats, I buy the
original Advantage for big dogs (>55 lbs), NOT THE MULTI OR ADVANTIX, and dose it individually to the cats using syringes without needles. The ingredients are the exact same (checked twice) in the original Advantage. The only difference is the dosage in the little squirt bottles, and the price. The big dog box is usually the same price as the small cats box, and you get a ton more of the actual product.
The big dogs usually get 4.0ml per tube. The standard dose for cats 9+lbs is 0.8ml.
Each tube takes care of my 5 cats when dosed correctly. A note to remember is that 1cc = 1ml. So it's a direct conversion. I use a 1cc syringe and dose at the .8 mark. It also makes getting it on them a lot easier.
The reason I really like the Advantage is that when my cats had fleas badly, the house had fleas just as bad, or worse. I tried Frontline. I tried all the Hartz and OTC crap. I tried the salt and borax tricks. I tried all of the home/natural "remedies" to get rid of them out of my house and carpet. I even contemplated more serious chemical warfare (foggers, diazinon & other pesticides). The ONLY thing that worked, was dosing the cats with Advantage. A week after I dosed, my house was flealess. I can't say why either, but since I've been dosing my cats with it, I've never had another issue with fleas in the house, nor on the cats...even Max.
Here's
an article on the net about it that I just found while writing this up. It basically explains the same thing I just did.
Sorry for the long post.