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: Identify desired dose and concentration Desired dose = 30 mg, Concentration = 50 mg/1 mL Step 2: Use the formula Volume (mL) = Desired dose ÷ Concentration Step 3: Insert values = 30 ÷ 50 Step 4: Calculate = 0.6 mL Step 5: Round to the nearest tenth ≈ 0.6 mL Final Answer: 0.6