The goal of this study was to develop a parenteral microemulsion formulation of Ceftazidime antibiotics. The ceftazidime sparingly soluble in organic solvent like ethanol, DMSO, and dimethyl formamide were determined. For biological experiment, organic solvent- free aqueous solutions of ceftazidime (hydrate) are prepared by directly dissolving the crystalline compound in aqueous buffer. The peudo ternary phase diagrams of oil, surfactant, cosurfactants (Butanol/ Isopropyl alcohol mixture) and water were constructed to identify boundaries for microemulsion existence. Ceftazidime microemulsion particle size, solution viscosity and conductivity were evaluated. The microemulsion stability and haemolytic activity were examined after dilution in 5% dextrose solution for injection to 1 mg/mL ceftazidime. In vitro haemolysis studies indicated that Ceftazidime microemulsions were well tolerated by erythrocytes. The novel microemulsion formulation of Ceftazidime was developed that is suitable for parenteral administration. This new formulation could potentially have less vehicle-associated side effects that current commercial formulation of Ceftazidime based on Cremophor® EL and isopropyl alcohol solution.