The healthcare provider prescribes cefazolin 800 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 How many mL should the nurse administer? (Enter numerical value only. If rounding is required, round to the nearest tenth.)

Here's how to calculate the volume (mL) the nurse should administer for cefazolin: 1. We know the following: Prescribed dose: 800 mg cefazolin IM every 6 hours (given) Vial content: 1 gram cefazolin (given) However, we need to consider the reconstitution process for accurate dosage calculation. Reconstitution information: For IM use, add 2.5 mL sterile water for injection. This dilution creates a total volume of 3.0 mL. 3. We need to find the concentration of cefazolin in the reconstituted solution (mg/mL). Concentration (mg/mL) = Total drug amount (mg) / Total volume (mL) after reconstitution Concentration (mg/mL) = 1 gram (which is 1000 mg) / 3.0 mL Concentration (mg/mL) = 333.33 mg/mL (round to nearest tenth) 4. Now, we can find the volume to administer for the prescribed dose (800 mg) considering the concentration (333.33 mg/mL) in the reconstituted solution. Volume to administer (mL): Dose (mg) / Concentration (mg/mL) Volume to administer (mL): 800 mg / 333.33 mg/mL Volume to administer (mL): 2.40 mL (round to nearest tenth) Therefore, the nurse should administer approximately 2.4 mL of the reconstituted cefazolin solution intramuscularly.