目前,许多医院青霉素皮试液系由药剂科或护士统一配制贮备液,分发至科室冰箱内保存,有的限3d内使用,有的限一周内使用。笔者认为这种做法不妥,提出如下意见供参考。众所周知,青霉素钾盐及钠盐的粉针均较稳定,但其水溶液极不稳定,如20万u/ml青霉素G溶液于30℃放置24h,其效价下降56%,青霉烯酸含量增 At present, many hospital penicillin skin test solution by the pharmacy department or nurse uniform preparation of stock solution, distributed to the department refrigerator to save, some limited 3d use, and some limited use within a week. The author believes that this practice is wrong, put forward the following opinions for reference. As we all know, penicillin potassium salt and sodium salt of the needle are more stable, but its aqueous solution is extremely unstable, such as 20 million u / ml penicillin G solution at 30 ℃ for 24h, its potency decreased 56%, penem acid content increased