NURSING NUR 2349 Dosage Calculations_ Questions and answers

Dosage Calculations Questions & answers Desired Over Have: Round answer to the nearest tenth. 1. The physician orders to give IV Penicillin 100,000 units. The Penicillin on hand is labeled 250,000 units/mL. How much of the drug will you administer? 2. Administer a dose of Vitamin K ( Aquamephyton) 0.5 mg. Available: Vitamin K 1 mg/1mL. How many mLs would you administer? 3. Morphine sulfate 6 mg IV push q4h for pain. On hand: Morphine sulfate 10 mg per mL. How many mLs would you give? 4. Doctor orders 10 units of insulin per hour via infusion pump. Insulin 100 units in 250 normal saline solution is available. How many mL will the nurse set the pump on? 5. Order: Kanamycin (Kantrex) 1 g po q6h x 3 days. Drug available Kantrex 500 mg. How many capsules will you administer per day? 6. In ectopic pregnancies RhoGam is administered. Order is for 300 mcg IM. On- hand is RhoGam 150mcg/mL. How many milliliters would you administer? 7. Ordered is Misoprostol (Cytotec) 200 mcg po to be given q4h for 24 hours. On-hand is 100 mcg tablet. How many tablets would you administer each day? 8. Methotrexate is given for molar pregnancy in serial IM injections. An order for Methotrexate 25 mg weekly x 4 weeks was written. On-hand is Methotrexate 50 mg/2mL vial. How many millimeters would you administer each week? 9. Dexamethasone is used in preterm labor patients. Order is for 6 mg every 12 hrs for 2 doses. On-hand is Dexamethasone 12 mg/2mL vial. How many millimeters would you administer per dose? 10. Zofran (Ordansetron) 8 mg tablets po q4-6 hrs PRN. On-hand is Zofran 4 mg. How many tablets would you administer? 11. The physician ordered Digoxin 250 mcg po qid. The label reads 1 tablet equals 0.25 mg. How many tablets will you administer? 12. The nonsteroidal medication naproxen (Naprosyn) has been prescribed for a patient, 1375 mg/day in divided doses. Each tablet contains 0.275 g. How many tablets equal this daily dose? 13. The order is to give 600 mg of Ampicillin IM qhr. The directions for dilution on the 2gm vial reads: Reconstitution with 4.8 mL of sterile water to obtain a concentration of 400 mg per mL. How many mL will you administer per dose? 14. The physician ordered 180 mg of Dilantin po q8h. The patient weighs 98 lbs. The label of the drug reads 250 mg per 5 mL. How many milliliters will you administer to the patient per dose? 15. The physician ordered Amoxicillin 10 mg IM q6h. Amoxicillin is supplied in 125 mg per 5 mL. How many milliliters will you administer per dose? 16. Ordered: Atropine 0.6 mg IM. Label reads 0.3mg per 0.6 mL. How many milliliters will you give per dose? Fluid Maintenance: Round to the nearest whole number. 17. An infant weighs 40 lbs. What is the required of fluid per day in mL? 18. Infuse 695 mL over the next 900 min by infusion pump. What is the IV flow rate in mL/hr? 19. Maggie, who weighs 13 kg 1, 20. Reggie, who weighs 24 kg 21. Jessie, who weighs 80 lbs 22. Lisa, who weighs 11 kg 1 BSA & Recommended Dosage: Round answer to the nearest tenth. 23. A pediatrician has ordered ampicillin 50 mg/kg/day po divided q6h for a child who weigh 44 lbs a. How many kilograms does the child weigh? b. How many milligrams should the child receive per day? c. How many milligrams should the child receive per dose? 24. Use the ordered dose from problem #23. The pharmacy has supplied reconstituted ampicillin, with a supply dosage of 500 mg/5 mL. How many milliliters should be given per q6h dose? 25. Mandy, a child who weighs 15 kilograms, is to be given amoxicillin. The recommended dosage of amoxicillin for children is 20 to 40 mg/kg/day po in equally divided doses administered q 8h. a. What is the minimum recommended range of milligrams of medication for this child per day? Maximum? b. What is the minimum recommended range of milligrams of medication for this child per q8h dose? Maximum? 26. The pediatrician has ordered amoxicillin 125 mg po q8h for Mandy. The available supply of amoxicillin is 125 mg/5 mL. a. Is her order within the recommended range for this medication? (yes/no) b. If so, how many mL of amoxicillin should be given per q8h administration? 27. A pediatrician orders Demerol 1mg/kg/day po divided q4h prn for a child who weighs 33 lbs. a. How many kilograms does this child weigh? b. How many milligrams of Demerol should this child receive per day? c. How many milligrams of Demerol should this child receive per dose? 28. A 6-year old weighing 25 kg has a staph infection and the provider has ordered Penicillin. The recommended dose of Penicillin for children is 25 to 50 a. What is the minimum recommended range of milligrams of medication for this child per day? Maximum? 29. The following order was written for a child weighing 66 lbs. Order: Morphine 0.2 mg/kg/day po q6h prn pain. a. How many kilograms does this child weigh? b. How many milligrams should the child receive per day? c. How many milligrams should the child receive per dose? 30. The pediatrician orders Dicloxacillin 62.5 mg po q6h for a child with a staph infection. The child weighs 77 lbs. The drug reference recommends a dose of 12.5-50 mg/kg in divided doses of q6h for a child 40 kg, with a maximum of 4 g per day. a. How many kilograms does this child weigh? b. Calculate the minimum recommended dosage. c. Calculate the maximum recommended dosage. d. Is this order within the recommended range for this child? e. If unsafe, what action should be taken by the nurse? Flow Rates: Round answer to the nearest whole number. 31.1200 mL D10W IV to infuse in 10 hours by infusion pump. 32.2 L D5W IV to infuse 24 hours by infusion pump. 33.1.5 L D5 ½ NS IV to infuse 20 hours by infusion pump. 34.30 mL D5W with antibiotic IV to infuse in 30 minutes by infusion pump. 35. Calculate the IV flow rate for 50 mL NS to infuse by infusion pump over 45 minutes. 36. Calculate the IV flow rate for 250 mL to infuse by infusion pump over two hours. 125 Drop Factor: Round answer to the nearest whole number. 37.1L NS to infuse in 10 hours. Drop factor is 10 gtt/mL. 38.1000 mL D5W IV to infuse in 8 hours. Drop factor is 20 gtt/mL. 39.1L NS IV to infuse in 10 hours. Drop factor is 10 gtt/mL. 40.50 mL NS with antibiotic IV to infuse in 20 minutes. Drop factor is 20 gtt/mL. 41. Calculate the IV flow rate for 1000 mL D5NS to infuse over 10 hours. Drop factor is 10 gtt/min. 42. Calculate the IV flow rate for 500 mL of D5 ½ NS to infuse over 4 hours. Drop factor is 15 gtt/min. 43. Calculate the IV flow rate for 100 mL NS to infuse over 30 minutes. Drop factor is 20 gtt/min. 44. Calculate the IV flow rate for 1L to infuse over 8 hours. Drop factor is 10 gtt/min. 45. Calculate the IV flow rate for 1000 mL D5W IV to infuse in 8 hours. Drop factor is 15 gtt/mL. BSA: Round to the nearest tenth. 46. Marcus, who weighs 9 kg and is 50 inches tall. BSA 47. Tonya, who is 80 cm tall and weighs 20 kg. BSA 48. Alicia, who weighs 15 kg and is 90 cm tall. BSA 49. Tommy, who is 35 inches tall and weighs 40 lbs. BSA 50. Allison, who measures 56 inches tall weighs 68 lbs. BSA 51. Kevin, who measures 61 inches tall and weighs 84 lbs. BSA 52. Jenny, whose BSA is 0.45 m2, is to receive Oncovin 2 mg/m2 once per week. The supply dosage available is 5 mg/mL. a. How many milligrams of Oncovin should she receive per administration? b. How many milliliters should be administered per dose? 53. Matt, who measures 177.5 cm tall and weighs 81.8 kg. BSA 54. Sally, whose BSA is 1.25 m2, is to receive acyclovir 600 mg po qid. The drug reference guide recommends 500 mg/m2 q8h. The supply available is 800 mg/2mL. a. How many milligrams of acyclovir should she receive per administration? b. How many milliliters should be administered per dose (round to nearest tenth)? c. Is this considered a safe dose? If not, what should the nurse do? 55. Kevin, a 5-year old with herpes simplex, is measured at 42 inches tall and weighs 43 lbs. The pediatrician prescribes ritonavir 200 mg po bid. The drug reference recommends the dose of 250 mg/m2 bid for a child. a. What is Kevin’s BSA (round to nearest tenth)? b. Calculate the recommended dose. c. Is this dose safe? If not, what should the nurse do? Critical Care: Round answer to the nearest whole number. 56. A critical care patient who weighs 80 kg has an order for 10 mcg/kg/min of dobutamine to be administered by electronic pump. The supply of dobutamine is 500 mg in 250 mL of D5W. What is the flow rate per hour? 57. The patient is to receive Pitocin (oxytocin) at a rate of 8 milliunits per minute. The IV contains 10 units of Pitocin in 1000 mL Lactated Ringers. How many mL/hr should be set on the pump to infuse the required dose? 58. Lidocaine 2 g IV in 500 mL D5W at 2mg/min via infusion pump. Determine the flow rate. Round to the nearest tenth. 59. Nitroglycerin 125 mg IV in 500 mL D5W to infuse at 42 mcg/min. Determine the flow rate. Round to the nearest tenth. 60.250 mL of IV solution with 225 mg of a medication to infuse at 3 mcg/kg/min via infusion pump. Patient weighs 110 lbs. Determine the flow rate and round to a whole number. 61. Lidocaine 2 g IV per 1,000 mL D5W at 4mg/min. Calculate flow rate and round to nearest tenths. 62. Pronestyl 0.5 g IV per 250 mL D5W at 2 mg/min. Calculate flow rate and round to the nearest tenths. 63. Isuprel 2 mg IV per 500 mL D5W at 6 mcg/min. Calculate flow rate and round to the nearest tenths. 64. Medication X 450 mg IV per 500 mL NS at 4 mcg/kg/min. Weight is 198 lbs. Round to the nearest tenth. 65. Dopamine 800 mg in 500 mL NS IV at 15 mcg/kg/min. Weight is 70 kg. Round to the nearest tenth. Heparin: Calculate the flow rate. Round to the nearest whole number. 66. Order: 0.45% NS 1,000 mL IV with heparin 25,000 units to infuse at 1,000 units/hr. 67. Order: D5W 500 mL IV with heparin 40,000 units to infuse at 1,100 units/hr. 68. Order: 0.45% NS 500 mL in IV with heparin 25,000 units to infuse at 500 units/hr. 69. Order: D5W 500 mL IV with heparin 40,000 units to infuse at 1,500 units/hr. 70. Order: D5W 500 mL IV with heparin 25,000 units to infuse at 800 units/hr.