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每年美国人在非处方药品上的花费达140亿美元，年增长率为8％～10％，这种增长来源于两个：一是自我保健的趋势，二是非处方药品（Over－The－Counter，OTC）数量的增加。主要是许多药品由处方药（RX）转变为非处方药（RX－to－OTC），并延伸成为系列产品。医生和药剂师应当了
Americans spend 14 billion U.S. dollars each year on non-prescription drugs at an annual growth rate of 8% -10%. This growth comes from two sources: one is the trend of self-care and the other is Over-The-Counter OTC) increase in the number. The main reason is that many medicines are converted from prescription drugs (RXs) to over-the-counter (RX-to-OTCs) and extended into a series of products. Doctors and pharmacists should do it