Opioids are a class of drugs that include the illegal drug heroin, synthetic opioids such as fentanyl, and pain relievers available legally by prescription, such as oxycodone (OxyContin®), hydrocodone (Vicodin®), codeine, morphine, and many others. Learn about the health effects of prescription opioids and read the DrugFacts on Fentanyl, Heroin, and Prescription Opioids.
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Marijuana
Marijuana refers to the dried leaves, flowers, stems, and seeds from the hemp plant, Cannabis …