pharm exam 4 review questions part 1 (dosage calc)

A client is being treated for congestive heart failure (CHF) and is to receive 0.5 milligrams of digoxin, which is available in 250-microgram tablets. The nurse would correctly administer how many tablets?

ANS: 2 tabs

A patient has an order for Chloromycetin, 500 mg every 6 hours. The drug comes in 250 mg capsules. What would the nurse administer?

ANS: 2 tabs

A health care provider's prescription reads 1000 mL of normal saline (NS) to infuse over 12 hours. The drop factor is 15 drops (gtt)/1 mL. The nurse prepares to set the flow rate at how many drops per minute? Fill in the blank. Record your answer to the nearest whole number.

21 ml

A health care provider's prescription reads morphine sulfate, 8 mg stat. The medication ampule reads morphine sulfate, 10 mg/mL. The nurse prepares how many milliliters to administer the correct dose?

0.8 ml

The child diagnosed with infectious gastroenteritis is prescribed trimethoprim sulfa 10 mg/kg/day in divided doses twice a day. The child weighs 60 pounds. The medication comes 100 mg/5 mL. How many milliliters will the nurse administer with the morning dose?

6.81 ml

The doctor orders Cardizem 75 mg IV. Instructions on the 50 mg vial say to reconstitute with sterile water to prepare a solution of 10 mg/2ml. You prepare 2.5 vials, how many milliliters will be needed to prepare the prescribed dose? 375 ml/dose 0.07 ml/dose 15 ml/dose 7.5 ml/dose

ANS C: 15 mL/dose

A vial of Doxil reads 0.5 g per vial. Instructions say to reconstitute each 12 mg with 2.5 ml of normal saline. How many milliliters of normal saline will be needed to reconstitute the vial to the recommended concentration?* A. 63 ml/vial 15,000 ml/vial 1.25 ml/vial 104.2 ml/vial

ANS D: 104.2 mL/vial

A nurse is to administer 30 mg of furosemide (Lasix) to a client with congestive heart failure (CHF). The vial contains 40 mg/mL. Which is the correct dose to administer?

ANS: 0.75 mL

A physical orders 75 mcg of a drug IM daily. The drug is available in a vial labeled 0.5 mg in 5 mL. How many mL with the patient receive?

ANS: 0.75 mL

A nurse is to administer 150 mg of a drug intramuscularly. The label on the multidose vials reads 100 mg/mL. How much would the nurse give?

ANS: 1.5 mL

The nurse is administering mannitol to the client with a head injury. The order reads 1,000 mL IVPB over 6 hours. At which rate should the nurse administer the medication via a pump?

ANS: 167 mL/hr. Simaya Webex Tionne C. Henson Host cam Shaniya Durant - 62% + Rationale: The nurse should divide the volume (1,000 mL) by the number of hours (6). This equals 166.6666. The nurse should round up if the number is greater than 5; therefore, the nurse should set the pump at 167 mL/hr.

The health care provider prescribes gentamicin 4 mg/kg/day PO in three divided doses for a client that weighs 132 Ibs. The label on the vial reads 80 mg/mL. How many mL does the nurse administer for each dose?

ANS: 1ml 4mg * 60kg = 240mg ( Per 24 hours) = 240mg / by 3 doses= 80mg per dose (Order=80mg per dose) = available is 80mg/per 1 ml = (Order / available * the ml) = 80mg/80mg *1 ml = 1ml

A child weighs 13.5kg and is prescribed a medication for 0.8mg/kg/dose. The stock strength is 10mg/2mL. What volume will you give the patient?

ANS: 2.16ml OR 2.2mL

The nurse is providing discharge teaching for a client who has been prescribed 600 mg of an oral liquid medication. The mother shows the nurse the label of the medication, which reads: 250 mg/mL. The nurse would instruct the mother to give how many milliliters?

ANS: 2.4 mL

A client who is recovering from gastric surgery is receiving I.V. fluids to be infused at 100 mL/hour. The I.V. tubing delivers 15 gtt/mL. The nurse should infuse the solution at a flow rate of how many drops per minute to ensure that the client receives 100 mL/hour?

ANS: 25 ggt/min. Rationale: To administer I.V. fluids at 100 mL/hour using tubing that has a drip factor of 15gtt/mL, the nurse should use the following formula: 100 mL/60 minutes × 15 gtts/1 mL = 25 gtt/minute.

The nurse provides care for a client admitted for pre-eclampsia. The health care provider prescribes magnesium sulfate at a maintenance dose of 1.5 grams per hour. Magnesium sulfate is available in 4 grams in 100 mL 0.9% sodium chloride. The nurse adjusts the flow rate to run at how many milliliters per hour? (Round at the end of the equation. Record your answer using one decimal place.)

ANS: 37.5ml/hr Order- 1.5g/hr Have is 4g/100ml = 1.5g/4g= 0.375 times ml given = 100ml = 0.375* 100ml= 37.5 ml

A 3.4kg child is ordered a medication for 5mg/kg/day with 4 doses per day. How many mg would you administer per dose?

ANS: 4.25 mg

A pediatric patient is prescribed to receive 5 mg/kg/day of a medication, divided in two equal doses. If the child weighs 48 pounds, how much medication is the nurse supposed to administer? 54 mg 80 mg 55 mg 78 mg

ANS: C Rationale: Calculate the intended dosage for the child using the following formula: Step 1: Convert pounds to kilograms 48 pounds = 1 kilogram 48 = 21.81 kg 1 pound 2.2 pounds 2.2 kg Step 2: Calculate the dosage for 1 day 5 mg/kg/day x 21.81 kg = 109.05 mg per day Step 3: Divide the daily dose into 2 equal doses 109.05 mg/2 = 54.53 or 55 mg

A pediatric client with ventricular septal defect repair is placed on a maintenance dosage of digoxin. The dosage is 8 mcg/kg/day, and the client's weight is 7.2 kg. The health care provider (HCP) prescribes the digoxin to be given twice daily. The nurse prepares how many mcg of digoxin to administer to the client at each dose? 12.6 mcg 21.4 mcg 28.8 mcg 32.2 mcg

ANS: C Rationale: Rationale: Calculate the daily dosage by weight first: 8mcg=day x 7.2 kg = 57.6mcg per day The HCP prescribes digoxin twice daily; 2 doses in 24 hours will be administered: 57.6 mcg per day/2 doses = 28.8 mcg for each dose