Oral Medications Dosage Calculations Practice Quiz (Part 2: 40 Items)
1. 1. Question
A health care provider orders acetaminophen (Tylenol) supp 1 g pr q
... [Show More] 6 hr prn temp > 101. Available: Tylenol supp. 325 mg (scored). How many supp. will you administer? Fill in the blank. Record your answer to the nearest whole number.
o Answer: (3) supp.
Incorrect
Correct answer:
• 3 supp.
Formula: Rationale:
• 1 g is equal to 1000 mg.
• Convert first by dividing 1 g with 325 mg to get 0.003 g.
• Then, use the standard formula above.
• Multiply 0.003 g to 1000 mg (desired dose) to get 3.
• Finally, multiply 3 to 1 supp (vehicle) to get 3 supp.
Computation:
2. 2. Question
A nurse practitioner prescribes clindamycin (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? Fill in the blanks. Record your answer to the nearest whole number.
• Answer: (3) tsp.
Incorrect
Correct answer:
• 3 tsp.
Formula: Rationale:
• Use the standard formula above.
• Divide 600 mg (desired dose) by 100 mg (drug on hand) to get 6 mg.
• Then, multiply 6 mg to 2.5 mL (vehicle) to get 15 mL.
• Convert mL to teaspoon; 1 tsp is equal to 5 mL.
• Multiply 15 mL to 1 tsp, then divide it by 5 mL to get 3 tsp.
Computation:
3. 3. Question
A health care provider ordered sulfasalazine (Azulfidine) Oral Susp 500 mg q 6 hr; Directions for mixing: Add 125 mL of water and shake well. Each tbsp will yield 1.5 g of sulfasalazine. How many mL will you give? Fill in the blanks.
• Answer: (5) ml.
Incorrect
Correct answer:
• 5 ml.
Formula: Rationale:
• Use the standard formula above.
• Divide 500 mg (desired dose) with 1.5 g (drug on hand) to get 333.3.
• Multiply 333.3 to 1 g and divide it by 1000 mg to get 0.3 tbsp.
• 1 tbsp is equal to 15 mL.
• Multiply 0.3 to 15 mL to get 4.9 mL.
• Finally, round it off to a whole number to get 5 mL.
Computation: 1 tbsp = 15 ml
4. 4. Question
A health care provider prescribes potassium chloride (Klotrix) 0.35 mEq/ lb po dissolved in 6 oz of oj at 8 am; Available: Klotrix 8 mEq/mL. How many mL of Klotrix will you add to the oj for a 20.5 Kg patient? Fill in the blanks.
• Answer: (2) ml.
Incorrect
Correct answer:
• 2 ml.
Formula: Rationale:
• 1 kg is equal to 2.2 lbs.
• Convert kg to lbs first; multiply 20.5 kg to 2.2 lbs to get 45.1 lbs.
• Since 0.35 mEq is recommended for 1 lb, multiply 45.1 lbs to 0.35 mEq to get 15.8 mEq/lb.
• Then, use the standard formula above.
• Divide 15.8 meq/lb (desired dose) by 8 mEq/lb (drug on hand) then multiply it by 1 mL (vehicle) to get 1.9 mL.
• Finally, round off to a whole number to get 2 mL.
Computation: 20.5 kg x 2.2 lbs = 45.1 lbs. 45.1 lbs. x 0.35 0.35 mEq/lb = 15.8 mEq/lb
5. 5. Question
A health care provider orders megestrol (Megace) Oral Suspension 160 mg po bid; Directions for mixing: Add 100 mL of water and shake vigorously. Each 0.5 mL will contain 10.7 mg of megestrol. How many tbsp of megestrol will you administer? Fill in the blanks. Record your answer using one decimal place.
• Answer: (0.5) tbsp
Incorrect
Correct answer:
• 0.5 tbsp.
Formula: Rationale:
• Use the standard formula above.
• Divide 160 mg (desired dose) with 10.7 mg (drug on hand) to get 14.9 mg.
• Then, multiply 14.9 mg to 0.5 mL (vehicle) to get 7.5 mL.
• 1 tbsp is equal to 15 mL.
• Convert by multiplying 7.5 mL to 1 tbsp, then divide it by 15 mL to get the final answer of 0.5 tbsp or ½ tbsp.
Computation:
6. 6. Question
A health care provider prescribes hydroxyzine (Vistaril) Oral Susp 10 mg q 4 hr prn anxiety; Directions for mixing: Add 125 mL of water and shake well. Each tsp will yield 15 mg of Vistaril. How many mL will you give? Fill in the blanks. Record your answer using one decimal place.
• Answer: (3.3) ml
Incorrect
Correct answer:
• 3.3 ml
Formula: Rationale:
• Use the standard formula above.
• Divide 10 mg (desired dose) by 15 mg (drug on hand) to get 0.67 mg.
• Multiply 0.67 mg to 1 tsp to get 0.67 tsp.
• 1 tsp is equal to 5 mL.
• Convert by multiplying 0.67 tsp to 5 mL and dividing it by 1 tsp to get 3.35 mL.
• Finally, round it off to one decimal place to get 3.3 mL.
Computation:
7. 7. Question
A health care provider prescribes ondansetron (Zofran) 8 mg p.o. t.i.d.; Available: Zofran in a 100 ml bottle labeled 4 mg/tsp.; How many ml will the nurse administer for each dose? Fill in the blanks.
• Answer: (10) ml
Incorrect
Correct answer:
• 10 ml
Formula: Rationale:
• Use the standard formula above.
• Divide 8 mg (desired dose) with 4 mg (drug on hand) to get 2 mg.
• 1 tsp is equal to 5 mL.
• Multiply 2 mg to 5 mL (vehicle) to get 10 mL.
Computation: Formula: Solution:
8. 8. Question
A health care provider orders cefaclor (Ceclor) 45 mg/kg/day p.o. in 3 divided doses for a patient who weighs 66 pounds. A 75 ml stock medication is labeled Ceclor 125 mg/ml. How many ml would the nurse administer per dose? Fill in the blanks. Record your answer using one decimal place.
• Answer: (3.6) ml
Incorrect
Correct answer:
• 3.6 ml
Formula: Rationale:
• 1 kg is equal to 2.2 lbs.
• Convert by dividing 66 lbs by 2.2 lbs then multiply by 1 kg to get 30 kgs.
• Multiply 45 mg/kg/day (desired dose) to 30 kgs to get 1,350 then divide it by 1000 to get 1.350 mg/day.
• Divide 1.350 mg/day into 3 doses then multiply it by 1000 to get 450 mg/dose.
• Divide 450 mg by 125 mg (drug on hand) then multiply it by 1 mL (vehicle) to get 3.6 mL.
Computation: Formula: Solution: 45 mg/kg/day x 30 kg = 1.350 mg/day ÷ 3 doses = 450 mg per dose
9. 9. Question
You are providing home care for a patient who needs 15 mL of magnesium hydroxide/aluminum hydroxide (Maalox) PO. She has only standard measuring spoons in the house. How many tablespoon(s) do you instruct her to take her dose? Fill in the blanks. Record your answer to the nearest whole number.
• Answer: (1) tablespoon(s)
Incorrect
Correct answer:
• 1 Tablespoon
Rationale:
• 1 tbsp is equal to 15 mL.
• Convert by multiplying 15 mL to 1 tbsp, then divide it by 15 ml to get 1 [Show Less]