However, FDA-approval is a long and difficult process, and prior to approval drug manufacturers are prohibited by the FDA from promoting any off-label use of any of their medications to the public.
然而，要得到FDA的批准是一个漫长而艰难的过程，首先是要批准FDA禁止药物制造商促进向公众推荐任何药物治疗的非常规使用这一条款。
However, FDA-approval is a long and difficult process, and prior to approval drug manufacturers are prohibited by the FDA from promoting any off-label use of any of their medications to the public.
然而，要得到FDA的批准是一个漫长而艰难的过程，首先是要批准FDA禁止药物制造商促进向公众推荐任何药物治疗的非常规使用这一条款。
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