Physicochemical stability of a preanesthetic mixture of hydroxyzine hydrochloride and atropine sulfate

Am J Hosp Pharm. 1975 Nov;32(11):1133-7.


The stability of a combination of hydroxyzine hydrochloride and atropine sulfate stored in syringes was studied. Syringes containing the two drugs were stored at 25 C and 3 C for ten days and analyzed at specific time intervals. Absorption spectra, chromatographic characteristics and pH were determined. Results showed the admixture to be stable for ten days at room temperature or under refrigeration. The technique used would probably not detect any significant degradation of atropine sulfate unless the reaction occurred with the hydroxyzine hydrochloride.

MeSH terms

  • Atropine / standards*
  • Chemical Phenomena
  • Chemistry, Physical
  • Drug Combinations
  • Drug Stability
  • Hydrogen-Ion Concentration
  • Hydroxyzine / standards*
  • Kinetics
  • Temperature


  • Drug Combinations
  • Hydroxyzine
  • Atropine