Xanax is an anti-anxiety and antidepressant medication. Xanax belongs to a medication class known as benzodiazepine. White Xanax Bars are the 2mg strength of medication Xanax. White Xanax Bar to treat anxiety and panic disorder. White Xanax Bars is an anti-anxiety and antidepressant medication. They look rectangular-shaped, white, 15.00 mm in size, and imprinted X ANA X 2 on them. White XANAX Bar contain inactive ingredients, but they may vary- docusate sodium, silicon dioxide, cellulose powdered, corn starch, magnesium stearate, and sodium benzoate.