My Pug is very sick from Hartz Flea Drops

Last week I notice my 1.5yr old pug was itching himself.  I had a close look and noticed a black flee and was planning on taking him to the vet to get a product to help.

That night, I was at wallmart shopping and went to get him a treat, when looking I noticed Walmart sold various flea removal products so I deceided to purchase the Hartz once-a-month drops.

I applied as directed and within the next 12hrs things got bad.  I noticed him being very aggiated and itchy, to the point I could tell he was very uncomfortable and crying/morning.  He could not go more than a few seconds without trying to reach or itch himself, I could tell he was in serious distress.

I gave him a long bath and tried washing the area of application, I repeated 3 more baths in the next hour.  At this point he started vomitting yellow mucuis and could not stand still.

I took him to the emerengcy vet who gave him a shot to assist, also provided a benedryl injection.  I had to keep my pug “drugged” up on benedryl to help with his disress for a few days, which helped the affects to his reaction.  After 4 days, he still has a serious itch problem where the application was applied.  I also have noticed a few other issues, which I think is nerve damage.  He has 2 areas near his back side that if you touch, he back legs will uncontrolably kick quickly.

I feel terrible about this whole situation and guilty for giving this to my best friend.

I love him very much and hope this passes, I cannot stop thinking about how I may of caused permanent damage giving this product to him.

DO NOT USE THIS PRODUCT ~ EVER !!!!