Precipitation behaviors as a function of (a) marketed products of DZP and (b) infusion fluids. (a) Horizon injection or Cercine injection was diluted with purified water. (b) Horizon injection was diluted with saline, purified water, 5% glucose injection, and Soldem 3A. Horizon injection was completely dissolved in acetonitrile/water (50:50 v/v), and it was used as a control. Each value represents the mean ± S.D., N = 3.