Drug use disorders are mental and behavioral disorders due to the use mind-altering (psychoactive) substances for nonmedical purposes. A wide range of often illegal drugs are included here. They include opiates (such as heroin and morphine), amphetamines, cocaine, barbiturates (sleeping pills), drugs that cause hallucinations (such as lysergic acid = LSD) and hydrocarbons ('glue sniffing'). Alcohol is treated separately in Map 443. Most of the drugs associated with these disorders are addictive or habit-forming. The desire to repeat the experience becomes progressively greater.
Estimating mortality directly attributable to illicit drug use such as overdose death is often difficult because the drugs are illegal, stigmatised and hidden. Deaths from diseases spread by non-sterile needles and syringes, such as Hepatitis B Map 387, Hepatitis C Map 388 and HIV/AIDS Map 378, are counted separately.
Drug use disorders caused 0.15% of all deaths worldwide in 2002, an average of 14 deaths per million people per year.