A nurse is preparing to administer fluoxetine 15 mg PO to a client who has premenstrual dysphoric disorder. Available is fluoxetine oral solution 20 mg/5 mL. How many mL should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

Rationale: How to solve it: Determine the dosage required: 15 mg Determine the concentration available: 20 mg/5 mL Use the formula: Volume (mL)=Required dose (mg)/Concentration (mg/mL) Convert the concentration into a simpler fraction: 20 mg/5 mL=4 mg/mL Calculate the volume: Volume (mL)=15 mg/4 mg/mL Simplify the calculation: Volume (mL)=3.75 mL Round to the nearest tenth: 3.8 mL