Morphine and heroin are both opioids but not the same substance. Morphine is a natural product extracted from the opium poppy and is used in medical settings to treat severe pain. Heroin, on the other hand, is synthesised from morphine and is typically used illicitly due to its potent euphoric effects. While both substances have a high potential for addiction, heroin is sometimes considered more dangerous due to its illegal status and the risks associated with unregulated use.