ATI Dosage Calculation and Safe Medication Administration 3.0 - Powdered Medications A nurse is preparing to administer cefazolin 500 mg IV bolus. The nurse reconstitutes a vial of cefazolin to yield a final concentration of 100 mg/mL. How many mL should the nurse administer? - ANSWER 5 mL Rationale: 1. 100 mg/1 mL = 500 mg/x mL 2. 100x = 500 3. x = 5 mL A nurse is preparing to administer amoxicillin 775 mg PO. The nurse reconstitutes a container of amoxicillin to yield a final concentration of 400 mg/5 mL. How many mL should the nurse administer? (Round to the nearest tenth.) - ANSWER 9.7 mL Rationale: 1. 400 mg/5 mL = 775 mg/x mL 2. 400x = 3,875 3. x = 9.6875 mL 4. x = 9.7 mL (rounded) A nurse is preparing to administer cefaclor 400 mg PO. The nurse reconstitutes a container of cefaclor to yield a final concentration of 187 mg/5 mL. How many m L should the nurse administer? (Round to the nearest tenth.) - ANSWER 10.7 mL Rationale: 1. 187 mg/5 mL = 400 mg/x mL 2. 187x = 2,000 3. x = 10.695187 mL 4. x = 10.7 mL (rounded) A nurse is preparing to administer pentamidine 1.75 mg IM. The nurse reconstitutes a vial of pentamidine to yield a final concentration of 100 mg/mL. How many mL should the nurse administer? (Round to the nearest tenth.) - ANSWER 1.8 mL Rationale: 1. 100 mg/1 mL = 175 mg/x mL 2. 100x = 175 3. x = 1.75 mL 4. x = 1.8 mL (rounded) A nurse is preparing to administer nafcillin 0.5 g IM. The nurse reconstitutes a vial of nafcillin to yield a final concentration of 250 mg/mL. How many mL should the nurse adminis ter? - ANSWER 2 mL Rationale: 1. 0.5 g = 500 mg 2. 250 mg/1 mL = 500 mg/x mL 3. 250x = 500 4. x = 2 mL A nurse is preparing to reconstitute and administer a powdered medication in a multidose vial. Which of the following actions should the nurse plan to take? A. Use a filtered needle to administer the medication. B. Briskly shake the medication vial after adding the diluent. C. Label the vial with the date and time before administering the medication. D. Swab the rubber seal on the vial with triclosan pr ior to adding the diluent. - ANSWER C. Label the vial with the date and time before administering the medication. Rationale: A. The nurse should use a filtered needle to withdraw mixed liquid medications from a vial to filter out particles that could harm the client. The nurse should use a new, non -
filtered needle to administer the medication to the client. B. The nurse should g ently roll the medication to mix it. Shaking the medication can cause bubbles to form that could harm the client. C. The nurse should label the vial with the date, time, the nurse's initials, and the concentration of the medication to ensure safe medicatio n administration. D. The nurse should swab the rubber seal on the medication vial with an alcohol swab to disinfect the vial before adding the diluent.
filtered needle to administer the medication to the client. B. The nurse should g ently roll the medication to mix it. Shaking the medication can cause bubbles to form that could harm the client. C. The nurse should label the vial with the date, time, the nurse's initials, and the concentration of the medication to ensure safe medicatio n administration. D. The nurse should swab the rubber seal on the medication vial with an alcohol swab to disinfect the vial before adding the diluent.
