Anyone know if the IGR Novaluron is safe for cats?

So I see that the Sentry brand "knock-off" of Frontline Plus, Fiproguard, has a new product called Fiproguard *Plus* (as opposed to Fiproguard Max, which has a different 2nd ingredient).

The Frontline brand has as its Insect Growth Regulator 2nd ingredient = S-methoprene.

The cheaper Sentry Fiproguard Plus has as its IGR "Novaluron".

It is labeled as being Not For Use On Cats.

However, I have seen a few products over the years that warn against that when its been arguable whether the ingredients do cause harm.

But I haven't been able to find anything in literature or labeling that specifically addresses, at all, Novaluron and cats.

I'm always on the look-out for economical opportunities to protect my growing cat army - and I've been doing the Frontline Plus - Large Dog method,

so I get more bang for my buck.

But if this new Sentry product's IGR is OK for cats, it will save me probably on average another $10 or so per 3-pack.

I do know that Lufenuron is safe for cats, but I don't want to assume that a "cousin" chemical behaves the same in an animal's body.

Thanks if you know!

Whoops - I misspoke -

it's not Sentry's "Fiproguard" I'm referring to.

It's Pet Armor Plus:

http://www.petarmor.com/product_dogs/petarmor-plus-igr/

Anyway - I'm asking about the safety of the ingredient Novaluron for cats.

(It'd be nice if we could edit posts beyond a certain time frame)  

I do not know about that specific ingredient, but you may want to look at this site:
http://www.consumeraffairs.com/pets/sentry.html
If they are making at least one unsafe product, all their products are suspect. The reports at the top of the list are mostly dogs, but if you keep scrolling, there are many reports of cats having seizures and/or dying.
Over the counter flea products are notorious for being dangerous and they are not regulated. Plus, they are usually ineffective at actually killing fleas and flea eggs. The only two safe otc options are Frontline and Advantage. Sentry is not identical to Frontline. They may both contain fipronil as the active ingredient, but the inactive ingredients are different and it is suspected that is where the chemicals causing these reactions are located.

Here is a TCS discussion on Pet Armor Plus, which is just as dangerous as the Sentry:
http://www.thecatsite.com/t/231282/pet-armor-plus

  lt says this on the label:

DO NOT USE ON CATS. Keep cats away from treated dogs for 24 hours. If applied to a cat or
ingested by a cat contact vour veterinarian

l wouldn't consider it.

I just bought a Frontline plus knockoff which has the IGR Novaluron.  The cat version, made by Sentry, contained methoprene, which I have used for years in other brands/products with no problems, but the dog formula was different.  I did some research on this formula (fipronil and Novaluron) and found many complaints from owners whose dogs and cats had gotten very sick or died from using this (mostly from neurological or renal problems, with very rapid onset).  After checking into it further I found that Novaluron is now banned in Europe, so I decided to send it back and stick with the old, if pricey name brand versions.  Not worth the risk for me. (I do use the dog size of Advantage or Frontline and titrate it for the cat's weight.)

I second not using that stuff, Novaluron is specifically labelled as "not safe for cats" so even using it on a dog (if it comes into contact with your cats) could be bad. After some research it looks like the only generic that has the same active ingrediants as Frontline's newest formulation is ZoGuard, so maybe consider that instead?

To add to that, it looks like Zoguard retails for $28 at Domyown, so ~8 dollars cheaper (via Amazon) per three month supply then Frontline Plus, but they unfortunately don't ship outside of the continental U.S...