It was originally thought that oxycodone (brand name: oxycontin) was safe from potential abuse.
When oxycodone was firstly discovered, it was thought that it can replace heroin and morphine, because of their massive hazardous and harmful use, and dependence. But that wasn’t the case, because oxycodone shortly became common drug of abuse.
It is still used as an opioid medication for treatment of moderate to severe pain.