【評論主題】8 處方中含 2% Ephedrine HCl（食鹽價為 0.28）及 0.5% Chlorobutanol（食鹽價為 0.24），依食鹽價法計算以 NaCl 為等張調節劑配製該處方 200 mL 時

【評論內容】

等張所需NaCl=0.9%x200ml=1.8gEphedrine=2%x200mlx0.28=>1.12g Chlorobutanol=0.5%x200mlx0.24 => 0.24g1.8-1.12-0.24=0.44