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\r\n\t\t\t\t\t\t\t\t<\/div>\r\n\t\t\t\t\t\t\t<\/div><\/div> and trembling. These symptoms must be consistent and ongoing, persisting at least six months, for a formal diagnosis of GAD. GAD is also common in individuals with a history of substance abuse and a family history of the disorder. Standardized rating scales such as GAD-7 can be used to assess the severity of GAD symptoms. Medications that have been found to be useful include duloxetine, pregabalin, venlafaxine, and escitalopram. In a given year, about two percent of American adults and European adults experience GAD. Globally about 4% are affected at some point in their life. GAD is seen in women twice as frequent as men.\r\n\r\nsee more at Wikipedia<\/a>\r\n\r\n