A nurse is preparing to administer lorazepam 1 mg PO to an older adult client who has insomnia and who cannot swallow oral tablets. Available is lorazepam oral solution 2 mg/mL. How many mL should the nurse plan to administer? (Round to the nearest tenth. Use a leading zero if it applies.)

Step 1 is to determine the amount of lorazepam that needs to be administered, which is 1 mg. Step 2 is to calculate the volume of lorazepam oral solution needed to deliver this dose. This is done using the formula: Dose (mg) ÷ Concentration (mg/mL) Given that the solution has a concentration of 2 mg/mL, we calculate: 1 mg ÷ 2 mg/mL = 0.5 mL Therefore, the nurse should administer 0.5 mL of lorazepam oral solution.