Illegal drugs, also known as controlled substances, are drugs that are prohibited by law to produce, possess, sell, or use without authorization. These substances can have serious health and social consequences and are deemed illegal due to their potential for abuse, addiction, and harm to individuals and society. Examples of commonly known illegal drugs include cocaine, heroin, marijuana (in some jurisdictions), LSD, ecstasy, methamphetamine, and opioids like fentanyl and heroin. The severity of penalties for illegal drug-related activities varies between countries and jurisdictions.
