Because the pediatric drug market is small, pediatric drugs have a short shelf life, and cost is the bottom line, even in the United States 75 % of drugs prescribed for children have not been clinically tested for children.
由於小兒專用製劑的市場小、儲架期短，基於成本考量，即使在美國，高達 75％的藥品都缺乏小兒適應症的臨床研究。