A nurse is preparing to administer fentanyl 100 mcg IM one time for pain to a client who is in labor and requests pain medication. Available is fentanyl injection 0.05 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.)

Given: Prescribed dose: 100 mcg of fentanyl Available concentration: 0.05 mg/mL Steps to solve: Convert mcg to mg: 1 mg = 1000 mcg So, 100 mcg = 0.1 mg Determine the volume to be administered: Set up a proportion to solve for the unknown volume (X): 0.05 mg/mL = 0.1 mg/X mL Cross-multiplying gives us: 0.05 mg x X mL = 0.1 mg x 1 mL Simplifying: 0.05X = 0.1 Solving for X: X = 0.1 / 0.05 = 2 mL