青霉素类药物应用广泛,用量往往以克计算,而有越来越大的趋势,则所含的离子量随之增高;又常用于重危患者,免疫功能差。尤其是心、肝、肾功能不良和电解质平衡紊乱的患者,更应严格根制离子的摄入量。因此,应用该类药物时,其离子的含量很重要,临床大夫问到时,一般参考书很少直接记载,只好根据药物分子式临时计算。如青霉素钾 Penicillin drugs are widely used, the amount is often calculated in grams, and there is an increasing trend, the ion content will be increased; often used in critically ill patients, poor immune function. In particular, heart, liver, kidney dysfunction and electrolyte imbalance in patients with more should be strictly root intake of ions. Therefore, the application of such drugs, the ion content is very important, the clinical doctor asked, the general reference books rarely directly documented, had to be based on the provisional formula for the drug. Such as penicillin potassium