Generalized anxiety disorder (GAD) is an anxiety disorder characterised by excessive, uncontrollable and often irrational worry about events or activities.  This excessive worry often interferes with daily functioning, and sufferers are overly concerned about everyday matters such as health issues, money, death, family problems, friendship problems, interpersonal relationship problems, or work difficulties.^[5][6] Symptoms may include excessive worry, restlessness,trouble sleeping, feeling tired, irritability, sweating, and trembling.

These symptoms must be consistent and ongoing, persisting at least six months.  GAD is also common in individuals with a history of substance abuse and a family history of the disorder.