A client is receiving ketorolac IM 45 mg every 6 hours for postoperative pain. The available 2 mL vial is labeled, "Ketorolac IM 30 mg/mL." How many mL should the nurse administer? (Enter numerical value only. If rounding is required, round to the nearest tenth.)

Given: Ordered dose of Ketorolac: 45 mg IM every 6 hours Concentration of Ketorolac: 30 mg/mL Step 1: Set up the proportion: Desired dose (mg) / Volume to administer (mL) = Concentration (mg/mL) Step 2: Substitute the values: 45 mg / Volume = 30 mg/mL Step 3: Solve for the unknown volume: Volume = 45 mg / (30 mg/mL) Volume = 45 mg x (1 mL / 30 mg) Volume = 1.5 mL