This illustration image shows tablets of opioid painkiller Oxycodon delivered on medical prescription taken on September 18, 2019 in Washington,DC. - Millions of Americans sank into addiction after using potent opioid painkillers that the companies churned out and doctors freely prescribed over the past two decades. Well over 400,000 people died of opioid overdoses in that period, while the companies involved raked in billions of dollars in profits. And while the flood of prescription opioids into the black market has now been curtailed, addicts are turning to heroin and highly potent fentanyl to compensate, where the risk of overdose and death is even higher.