While using narcotics, someone might experience a sense of euphoria but as time passes by drowsiness, nausea and even vomiting follow. Overdosing can lead to coma, death, convulsions and other unpleasant things.
Among narcotics, we can find morphine, heroin, codeine, opium, Fentanyl, Vicodin, methadone, and OxyContin. It's very difficult to stop taking doses, and usually withdrawal symptoms present when someone tries to stop being an addict. Anxiety, cramps, chills and sweating, tremors, and even diarrhea can appear in the process.
Sometimes addicts use contaminated seringes or needles to inject drugs. This can lead to the transmission of blood-related deceases like HIV and hepatitis. And most of the deaths caused by narcotics are due to infections of vital life supporting functions of the lungs, brain, and/or heart.