Heroin is a highly addictive and illegal drug made from the opioid morphine. It is a white or brownish powder typically dissolved and injected into the veins, smoked or snorted. Heroin produces a strong sense of euphoria and a sense of well-being, which makes it highly addictive.
Regular use of heroin can lead to physical dependence and withdrawal symptoms, including restlessness, muscle and bone pain, insomnia, and diarrhea, when use is discontinued. In addition, regular use of heroin can also lead to serious health problems, including collapsed veins, infections of the heart and lungs, liver and kidney disease, and HIV/AIDS from sharing needles. Heroin is considered a dangerous and highly addictive substance and is classified as a Schedule I controlled substance in many countries, including the United States.