Many individuals who abuse alcohol and drugs also experience mental illness, and many individuals who have mental illness experience problems with substance abuse. Alcohol and drugs can be a kind of self-medication, and in such instances, individuals who have mental illness could have conditions like depression or anxiety that might temporarily be eased when the individual is intoxicated. Mental illness is always aggravated by alcohol and drug abuse, and of major concern is that individuals abusing alcohol and drugs are more likely to attempt suicide and also to die from suicide attempts.

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