Drug Calculation Questions
Q1: A vial of amoxicillin 500mg is reconstituted with WFI to give a concentration of 200mg/ml. Calculate the volume of this solution to be drawn up for injection if the preparation is for 120mg.
- 0.7 ml
- 1.6 ml
- 0.6 ml
- 8.3 ml
Q2: Doctor’s Order: Nafcillin 500mg po pc; Available: Nafcillin 1 gm tab (scored). How many tabs will you administer per day?
- 2.5 tabs
- 2 tabs
- 1.5 tabs
- 1 tab
Q3: 450 mg of aspirin is required. Stock on hand is 300mg tablets. How many tablets should be given?
- 2 tablets
- 1 ¾ tablets
- 1 ⅔ tablets
- 1 ½ tablets
Q4: Doctor’s order: 1.5 L of NS to be infused over 7 hours; Drop factor: 15 gtt/ml. What flow rate (mL/hr) will you set on the IV infusion pump?
- 53.6 ml/hr
- 214.3 ml/hr
- 35.7 ml/hr
- 142.9 ml/hr
Q5: Your patient has had the following intake: 2 ½ cups of coffee (240 mL/cup), 11.5 oz of grape juice, ¾ qt of milk, 320 mL of diet coke, 1¼ L of D5W IV, and 2 oz of grits. What will you record as the total intake in mL for this patient?
- 2,325 ml
- 3,265 ml
- 3,325 ml
- 2,235 ml
Q6: Doctor’s Order: Demorol 50 mg IVP q 6 hr prn pain: Available: Demerol 75 mg/1.3 mL. How many mL will you administer?
- 0.87 ml
- 1.87ml
- 2ml
- 2.87ml
Q7: Doctor’s Order: Infuse 50 mg of Amphotericin b in 250 mL NS over 4 hr 15 min; Drop factor: 12 gtt/ml. What flow rate (mL /hr) will you set on the IV infusion pump?
- 11.8 ml/hr
- 58.8 ml/hr
- 14.1 ml/hr
- 60.2 ml/hr
Q8: 800ml of fluid is to be given IV. The fluid is running at 70ml/hr for the first 5 hours then the rate is reduced to 60ml/hr. Calculate the total time taken to give 800ml.
- 11 hours 20 minutes
- 9 hours
- 10 hours 25 minutes
- 12 hours 30 minutes
Q9: A patient is to be given amoxicillin 175mg. What volume of solution should be drawn up for the injection if the concentration after dilution with water for injection is 300mg/ml?
- 0.6 ml
- 0.7 ml
- 1.7 ml
- 0.9 ml
Q10: A patient has been prescribed 1L of a saline solution. The rate is set at 150 ml/hr. How long will the infusion take?
- 5 hours and 20 minutes
- 4 hours and 40 minutes
- 6 hours and 10 minutes
- 6 hours and 36 minutes
Q11: Over a period of 9 hours a patient is to receive half a liter of dextrose 4 % in 1/5 normal saline via a volumetric infusion pump. At what flow rate should the pump be set?
- 24 ml/hr
- 55.5 ml/hr
- 180 ml/hr
- 1.8 ml/hr
Q12: 700ml of saline solution is to be given over 8 hours. The IV set delivers 20 drops/ml. What is the required drip rate?
- 18.3 drops/min
- 49.5 drops/min
- 29.2 drops/min
- 32.7 drops/min
Q13: Doctor’s Order: bumex 0.8 mg IV bolus bid; Reconstitution instructions: Constitute to 1,000 micrograms/ 3.1 mL with 4.8 mL of 5% Dextrose Water for Injection. How many mL will you administer?
- 2 ml
- 3.5 ml
- 3 ml
- 2.5 ml
Q14: A patient is prescribed 120 ml of Hartmann’s solution to be given over 5 hours. The microdrip delivers 60 drops/ml. calculate the required drip rate in drops/min
- 20 drops/min
- 2.5 drops/min
- 24 drops/min
- 32 drops/min
Q15: Doctor’s order: Synthroid 75 mcg po daily; Available: Synthroid 0.15mg tab (scored). How many tab will you administer?
- 1 tab
- 0.5 tab
- 2 tabs
- 1.5 tabs
Q16: A solution contains paractamol 120mg/5ml. How many milligrams of paracetamol are in 40 ml of the solution?
- 600 mg
- 960 mg
- 320 mg
- 160 mg
Q17: One gram of dextrose provides 16kj of energy. How many kilojoules does a patient receive from an infusion of half a liter of dextrose?
- 32kj
- 16kj
- 8kj
- 4kj
Q18: A patient is prescribed phenobarbitone 140mg. stock ampoules contain 200mg/ml. what volume must be withdrawn for injection?
- 0.7 ml
- 1.4 ml
- 6 ml
- 0.6 ml
Q19: Doctor’s order: Diuril 1.8 mg/kg pot id; Available: Diuril 12.5 mg caps. How many caps will you administer for each dose to a 14 kg child?
- 2 caps
- 2.5 caps
- 3 caps
- 1.5 caps
Q20: Doctor’s order: Infuse 1200 mL of 0.45% Normal Saline at 125 mL/hr; Drop Factor: 12gtt/ml. How many gtt/min will you regulate the IV?
- 2 gtt/min
- 12 gtt/min
- 25 gtt/min
- 27 gtt/min
Q21: A post-operative patient is to receive a PCA infusion of fentanyl 350 micrograms in 35 ml of normal saline via a syringe pump. The PCA is set to give a bolus dose of 1 ml each time the button is pressed. What is the concentration of the fentanyl in the saline solution?
- 0.01 mg/ml
- 0.35 mg/ml
- 1 mg/ml
- 0.1 mg/ml
Q22: Doctor’s Order: Cleocin Oral Susp 600 mg po qid; Directions for mixing: Add 100 mL of water and shake vigorously. Each 2.5 mL will contain 100 mg of Cleocin. How many tsp of Cleocin will you administer?
- 3 tsp
- 5 tsp
- 3.5 tsp
- 1 tsp
Q23: Doctor’s Order: Heparin 7,855 units Sub Q bid; available; Heparin 10,000 units per ml. How many mL will you administer?
- 0.79 ml
- 1.79 ml
- 0.17 ml
- 1.17 ml
Q24: 400mg of penicillin is to be given IV. One hand is penicillin 600mg in 2 ml. What volumes should be drawn up?
- 1.3 ml
- 3 ml
- 0.7 ml
- 1.6 ml
Q25: Doctor order: Rocephin 0.5 grams in 250 mL of D5W to infuse IVPB 45 minutes; Drop factor: 12 gtt/ml. How many gtt/ min will you regulate the IVPB?
- 6 gtt/min
- 30 gtt/min
- 67 gtt/min
- 87 gtt/min
Q26: Doctor’s order: Tylenol supp 1 g prq q 6 hr prn temp >101; available: Tylenol supp 325 mg (scored). How many supp will you administer?
- 2 supp
- 1 supp
- 3 supp
- 5 supp
Q27: Mrs B has been ordered 100 ml to be infused over 45 minutes via a 20 drops/ml giving set. What drip rate should be set?
- 50 drops per minute
- 44 drops per minute
- 41 drops per minute
- 52 drops per minute
Q28: Doctor’s order: Streptomycin 1.75 mg /lb IM q 12 hr; Available: Streptomycin 0.35 g/ 2.3 mL. How many mL will you administer a day to a 59 kg patient?
- 1.5 ml
- 2ml
- 2.5 ml
- 3ml
Q29: Doctor order: Mandol 300 mg in 50 mL of D5W to infuse IVPB 15 minutes; drop factor: 10 gtt/mL. How many mL/hr will you set on the IV infusion pump?
- 200 ml/hr
- 87.5 ml/hr
- 3.3 ml/hr
- 50 ml/hr
Q30: Doctor’s Order: Kantamycin 7.5 mg/kg IM q 12 hr; Available: Kantamycin 0.35 gm/mL. How many mL will you administer for each dose to a 71 kg patient?
- 2 ml
- 1 ml
- 2.5 ml
- 1.5 ml
Q31: One liter of Hartmann’s solution is to be given over 12 hours. Calculate the flow rate of a volumetric infusion pump
- 1.4 ml/hr
- 16.6 ml/hr
- 83.3 ml/hr
- 72 ml/hr
Q32: A Patient is to be given co-amoxiclav. The Recommended dosage is 20mg/kg/day, 3 doses per day. Calculate the size of a single dose if the patient’s weight is 24kg
- 160 mg
- 60 mg
- 120 mg
- 180 mg
Q33: At 22H00 hours on Thursday, 1 Liter of Saline is set to run at 80ml/hr. When will the infusion be finished:
- 08:30 AM
- 06:00 AM
- 12:00 PM
- 10:30 AM
Q34: Doctor’s order: Tazidime 0.3 g Im tid; Reconstitution instructions: For IM solution add 1.5 mL of diluent. Shake to dissolve. Provides an approximate volume of 1.8 mL (280mg/mL). How many mL will you give?
- 1.9 ml
- 2 ml
- 3 ml
- 1.1 ml
Q35: Doctor’s order: Sulfasalazine Oral susp 500 mg q 6 hr; Directions for mixing: Add 125mL of water and shake well. Each tbsp, will yield 1.5 g of Sulfasalazine. How many mL will you give?
- 5 mL
- 15 mL
- 100 mL
- 2 mL
Answers
- 0.6 ml
- 1.5 tabs
- 1 ½ tablets
- 53.6 ml/hr
- 3,265 ml
- 0.87 ml
- 58.8 ml/hr
- 12 hours 30 minutes
- 0.6 ml
- 6 hours and 36 minutes
- 55.5 ml/hr
- 29.2 drops/min
- 2.5 ml
- 24 drops/min
- 0.5 tab
- 960 mg
- 8kj
- 0.7 ml
- 2 caps
- 25 gtt/min
- 0.01 mg/ml
- 3 tsp
- 0.79 ml
- 1.3 ml
- 67 gtt/min
- 3 supp
- 44 drops per minute
- 3ml
- 200 ml/hr
- 1.5 ml
- 83.3 ml/hr
- 160 mg
- 10:30 AM
- 1.1 ml
- 5 mL