How can I get more practice with Pharmacology in particular dosage calculations?
Answer
1. The nurse is providing discharge teaching for a client who has been prescribed 500 mg of an oral liquid medication. The mother shows the nurse the label of the medication, which reads 250 mg / 5 mL. The nurse would instruct the mother to give how many milliliters?
500 mg x 5mL / 250 mg = 10 mL
2. The physician orders 1000 cc D5W with 1/4% NS to infuse in 8 hours. The drop factor of the administration set is 15 gtt/mL. Calculate the number of drops/min you would administer.
1000 cc / 8 hours x 15 gtt / min x 1 hour / 60 mins = 31.25 gtt / min
3. 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 mL should the nurse administer? (Round to the nearest tenth.)
400 mg x 5 mL / 187 mg = 10.7 mL