The physician orders erythromycin 1 g in 100 mL of D5W to infuse in 30 minutes. Calculate the flow rate in milliliters per hour. _____________ (LABEL CORRECTLY TO RECEIVE CREDIT: DO NOT USE SPACES IN YOUR ANSWER, I.e. 33mL/hr)

Total volume to be infused = 100 mL. Infusion time in minutes = 30 minutes. Convert the infusion time from minutes to hours. Infusion time in hours = 30 minutes / 60 minutes/hour = 0.5 hours. Calculate the flow rate in milliliters per hour (mL/hr). Flow rate (mL/hr) = Total volume (mL) / Infusion time (hr) = 100 mL / 0.5 hr = 200 mL/hr.