Cat having side effects from Sergeant's Gold Squeeze-on
My cat turns 1 next month and yesterday I gave him a flea and tick treatment, Sergeants gold squeeze-on for cats and kittens 5 lbs. and over, I followed the directions exactly and almost immediately he started trying to lick it off (I'm not sure if he ingested any of the medication or not) but he got really squirrly running around with dilated pupils. I thought maybe it was just burning him since it's a chemical so I didn't worry too much and figured he'd calm down soon. It's been about 17 hours and his pupils are still dilated and I'm noticing the tip of his tail is quivering and he's slightly shaking. He's not running around spastically anymore, now he's walking around really slow and seems kind of depressed.
I'm not really worried, just a little concerned. I've tried researching online, and have found lots of horror stories about this product, but only involving dogs, not cats, and people who didn't use it properly (most used it with another flea treatment).
Should I be concerned or is this normal behavior and side effects? I have never used this exact product on this cat or others, but I have used one other product for this cat, one that I got from the Vet (I think Revolution) and that one worked fine, no side effects. The other store bought products I've used on my other cat never effected him, but I read Seargent's uses a different ingredient than most other products.