1991年美国抗生素市场价值从1990年的48亿美元增长到53亿多美元,预计1997年可达125亿美元。头孢菌素类可能保持最大的市场份额,到1997年预计营业额约达42亿美元,其次是喹诺酮,销售额将超过29亿美元。1991年,头孢菌素占44.8％的市场份额,而继辉瑞公司的氟康唑(Fluconazole,商品名:Diflucan)投放市场后,抗真菌药的销售额增长50％。1987年Mile公司推出环丙沙星(商品名:Cipro)后,喹诺酮类出现最 In 1991, the market value of the antibiotics in the United States increased from 4.8 billion U.S. dollars in 1990 to 5.3 billion U.S. dollars and is expected to reach 12.5 billion U.S. dollars in 1997. Cephalosporins are likely to maintain the largest market share, with estimated revenues of about $ 4.2 billion by 1997, followed by quinolones, with sales of more than $ 2.9 billion. Cephalosporins accounted for 44.8% of the market in 1991, and sales of antifungal drugs increased 50% following the launch of Pfizer’s Fluconazole (Diflucan). Quinolones appear most after Mile launched ciprofloxacin (trade name: Cipro) in 1987