To my knowledge, the only products sold with fentanyl were pain patches. They were put on after surgery and taken off 3 days later. They worked great in humans and animals when used as directed. I did read that addicts would get the patches and chew on them. Oxycontin was a designed slow release pain pill for severe pain. Pain is easier to prevent and takes less drug. But they figured out to chop it up and snort it or cook it and inject it, become addicted to it, so it got a bad name. There are a lot of people out there that are in legitimate severe pain and that's what Oxycontin was designed for. So they crack down on it and who gets hurt....the people that use it legitimately and legally.