A nurse is preparing to administer diphenhydramine 1.25 mg/kg IM to a child who weighs 68 lb. Available is diphenhydramine injection 50 mg/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.)

Identify the given information: Dose of diphenhydramine: 1.25 mg/kg Weight of the child: 68 lb Concentration of diphenhydramine injection: 50 mg/mL Convert the child's weight from pounds to kilograms: 1 lb ≈ 0.453592 kg Calculate the total dose of diphenhydramine in mg: Total dose = Dose/kg x Weight (kg) Substitute the values: Total dose = 1.25 mg/kg x 68 lb x (0.453592 kg/1 lb) Total dose ≈ 38.6 mg Calculate the volume of diphenhydramine injection to be administered: Volume = Total dose (mg) / Concentration (mg/mL) Substitute the values: Volume = 38.6 mg / 50 mg/mL Volume ≈ 0.772 mL Round the answer to the nearest tenth: Volume ≈ 0.8 mL