The document discusses the reasons for restrictions on narcotic substances like opioids and opiates. It describes how narcotics were originally used as pain relievers but can become addictive with repeated use and cause overdoses. It then tells the story of a Reddit user who tried heroin and became addicted, overdosing multiple times before getting sober after 6 years of treatment. The restrictions aim to prevent drug abuse and overdoses, as synthetic opioids have led to many deaths from overdoses, especially among young people. National laws like the Narcotic Drugs and Psychotropic Substances Act of India provide guidelines on controlled use and penalties for illegal sale and use of narcotics.