"It doesn't happen very often at all, but just like a person they can have a bad reaction to any kind of medication," Cheryl Whitfield told WYTV.
Austintown police Sgt. Rick John said he received a call from the veterinary clinic.
"The Austintown Vet Clinic is on the phone, can we give them some Narcan and does it work on dogs?" John told WYTV reported.
The officer drove to a pharmacy and obtained Narcan, which reversed the effects of the medication.
"I had to watch, I was intrigued by it. And I wasn't 100 percent certain it would work on a dog," John told WYTV.
Although Narcan is a spray, Whitfield used an IV to make the medicine work faster, the television station reported.
"I took a needle and syringe … and drew it into syringe and gave it right in the vein, and he was up within seconds to minutes afterwards," Whitfield told WYTV.
Trooper went home moments later and was doing much better by Monday, the television station reported.