Editing Mental Health and Psychosocial Nursing (section)

=== General Concepts ===
Tolerance is the need for more substance for the same effect. Withdrawal is a substance-specific syndrome on cessation. Substance use disorder is diagnosed by impaired control, social impairment, risky use, and pharmacologic criteria, and graded mild, moderate, or severe.

Screening: CAGE (Cut down, Annoyed, Guilty, Eye-opener), AUDIT, CRAFFT for adolescents. Ask about substance use in a nonjudgmental, matter-of-fact way, including exact substances, amounts, routes, and time of last use. '''Time of last use determines when withdrawal will begin''' and is the most important assessment datum on admission.