关键词：处方药;门诊;治疗;成年人;费用;人口;家庭
摘 要：This Statistical Brief provides descriptive statistics on expenditures for the top five therapeutic classes of outpatient prescription drugs, ranked by total expenses in 2009 for adults age 18 and older in the U.S. civilian noninstitutionalized population. Prescription drug therapeutic classes are defined according to the Multum Lexicon therapeutic classification system. In 2009, 18 broad therapeutic classifications were identified.