The healthcare provider prescribes cefazolin 500 mg IM every 6 hours. The available vial is labeled, "Cefazolin 1 gram," and the instructions for reconstitution state. "For IM use, add 2.5 mL sterile water for injection to provide a total volume of 3.0 mL." After reconstitution, how many mL should be administered to the client? (Enter numeric value only. If rounding is required, round to the nearest tenth.)

Convert the available dose from grams (g) to milligrams (mg). Available dose = 1 gram Conversion factor = 1 g = 1000 mg Available dose = 1 g x 1000 mg/g = 1000 mg. Identify the final concentration of the reconstituted solution. Reconstituted dose = 1000 mg Reconstituted volume = 3.0 mL Concentration = 1000 mg/3.0 mL Calculate the volume in milliliters (mL) to administer. Prescribed dose = 500 mg Volume (mL) = (Prescribed dose (mg) / Available concentration (mg)) x Available volume (mL) = (500 mg / 1000 mg) x 3.0 mL = 0.5 x 3.0 mL = 1.5 mL