A nurse is preparing to administer diphenhydramine 30 mg IM to a client. 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 Desired Dose and Available Concentration: Desired Dose: 30 mg of diphenhydramine Available Concentration: 50 mg/mL (This means there are 50 mg of diphenhydramine in every 1 mL of solution) Set up the Calculation: We need to find the volume (in mL) that contains the desired dose of 30 mg. We can use the following formula: Volume (mL) = Desired Dose (mg) / Available Concentration (mg/mL) Plug in the Values and Calculate: Volume (mL) = 30 mg / 50 mg/mL Volume (mL) = 0.6 mL Round to the Nearest Tenth : 0.6 mL