A nurse is preparing to administer perphenazine 0.032 g PO divided in four equal doses daily to a client who has psychosis. Available is perphenazine oral solution 16 mg/5 mL. How many mL should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

Step by step calculation: Determine the total daily dosage in grams: 0.032 g Convert grams to milligrams: 0.032 g×1000 mg/g=32 mg Divide the total daily dose into four equal doses: Dose per administration=32 mg/4=8 mg Determine the concentration available: 16 mg/5 mL Use the formula: Volume (mL)=Required dose/(mg)Concentration (mg/mL) First, find the mg/mL concentration: 16 mg/5 mL=3.2 mg/mL Now calculate the volume: Volume (mL)=8 mg/3.2 mg/mL Volume (mL)=2.5