On average, 44 people in the United States die every day from an overdose of opioid prescription painkillers. These drugs — such as Vicodin, Percocet, codeine, and morphine — reduce the brain’s recognition of pain by binding to certain receptors in the body. With continued use, a person can develop a physical dependence on these drugs, such that withdrawal symptoms occur if the drug is stopped. These drugs can also cause a “high.” Both of these effects contribute to addiction — that is, the loss of control around the use of a drug, even though it causes harm to the person. Addiction to opioid painkillers is the biggest risk factor for heroin addiction.