Claim: Heroin is a common illicit opioid.

Opiate is a term classically used in pharmacology to mean a drug derived from opium . Opioid , a more modern term , is used to designate all substances , both natural and synthetic , that bind to opioid receptors -LRB- including antagonists -RRB- . Opiates are alkaloid compounds naturally found in the opium poppy plant Papaver somniferum .  The psychoactive compounds found in the opium plant include morphine , codeine , and thebaine . All opioids , like opiates , are considered drugs of high abuse potential and are listed on various `` Substance-Control Schedules '' under the Uniform Controlled Substances Act of the United States .   In 2013 , between 13 and 20 million people used opiates recreationally -LRB- 0.3 % to 0.4 % of the global population between the ages of 15 and 65 -RRB- .