A nurse is preparing to administer diphenhydramine 30 mg IM stat to a client who is having an allergic reaction. Available is diphenhydramine 50 mg/1 mL. How many mL should the nurse administer? (Round the answer to the nearest tenth.)

Step 1 is to identify the ordered dose and the available concentration Ordered Dose: 30 mg Available Concentration: 50 mg / 1 mL Step 2 is to calculate the volume to administer in milliliters (mL) (Ordered Dose ÷ Available Dose) × Available Volume = Result (30 ÷ 50) × 1 = Result 30 ÷ 50 = 0.6 0.6 × 1 = 0.6 Volume to administer = 0.6 mL Step 3 is to round to the nearest tenth 0.6 mL = 0.6 mL