Error in drug class. The article “Identifying and Managing Posttraumatic Stress Disorder” (December 15, 2013, p. 827) contained an error in Table 3 (p. 832). Of the four drugs listed under the header “alpha-adrenergic blockers,” only prazosin (Minipress) is an alpha-adrenergic blocker. The header should have been “antiadrenergic agents” instead. The online version of this article has been corrected.