A nurse is preparing to administer adenosine 12 mg IV bolus to a client. Available is adenosine injection 60 mg/20 mL. How many mL should the nurse administer? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)

Calculation: Determine the desired dose: Ordered dose: 12 mg Determine the available concentration of the medication: Available concentration: 60 mg / 20 mL Calculate the volume needed to administer the desired dose: Formula: Volume (mL) = Desired dose (mg) × (Volume of solution (mL) / Available dose (mg)) = 12 mg × (20 mL / 60 mg) = 240 mL / 60 = 4 mL