Stability of frozen solutions of cefazolin sodium

Am J Hosp Pharm. 1976 Jul;33(7):639-41.

Abstract

The stability of frozen solutions of cefazolin sodium was investigated in nine commonly used diluents at concentrations of 1 g with 2.5 ml, 500 mg with 100 ml and 10 g with 45 ml in both glass and polyvinylchloride plastic containers. The diluents were: Water for Injection USP; 0.9% Sodium Chloride Injection USP; 5% Dextrose Injection USP (D5W); D5W with 0.02% sodium bicarbonate; D5W in Lactated Ringer's Injection USP; Lactated Ringer's Injection USP; Ionosol B in D5W; Normasol M in D5W; and Plasmalyte in D5W. Frozen cefazolin sodium solutions, containing Water for Injection USP, 5% Dextrose Inection USP or 0.9% Sodium Chloride Injection USP as the diluents, retained more than 90% of labeled potency for up to 26 weeks when frozen within one hour after reconstitution and held at -10 C or -20 C. Frozen cefazolin sodium solutions, made with other diluents, were stable for up to four weeks when frozen within one hour after reconstitution and held at -10 C.

MeSH terms

  • Animals
  • Biological Assay
  • Cefazolin / analysis*
  • Cefazolin / pharmacology
  • Cefazolin / toxicity
  • Cephalosporins / analysis*
  • Drug Stability
  • Female
  • Freezing
  • Hydrogen-Ion Concentration
  • Lethal Dose 50
  • Mice
  • Staphylococcus aureus / drug effects
  • Time Factors

Substances

  • Cephalosporins
  • Cefazolin