The physician orders azithromycin 500 mg in 250 mL of D5W IVPB to be infused over 1.5 hours. Tubing drop factor is 15 gtt/mL Calculate the flow rate in drops per minute.

Calculation: Total volume to be infused = 250 mL. Identify the infusion time and convert it to minutes. Infusion time = 1.5 hours Infusion time in minutes = 1.5 hours × 60 minutes/hour = 90 minutes.. Drop factor = 15 gtt/mL. Calculate the flow rate in milliliters per minute (mL/minute). Flow rate (mL/minute) = Total volume (mL) / Infusion time (minutes) = 250 mL / 90 minutes = 2.7777 mL/minute. Calculate the flow rate in drops per minute (gtt/minute). Flow rate (gtt/minute) = Flow rate (mL/minute) × Drop factor (gtt/mL) = 2.7777 mL/minute × 15 gtt/mL = 41.6666 gtt/minute. Round the answer to the nearest whole number. = 42 gtt/minute.