Chapter 12 Methods of Dosage Calculations

True / False Questions Chapter 012 Methods of Dosage Calculation 1. The dosage ordered will be found on all drug labels. True False 2. The prescription dosage unit and the dosage unit on hand will always be the same. True False 3. It is important to determine the desired dose before calculating the amount to administer. True False 4. There will be a slight difference in the answer obtained when using proportion versus dimensional analysis calculation methods. True False 5. The unit of measurement of the desired dose must be the same as the dose on hand. True False 6. The dosage strength of a drug can be determined from the drug label. True False 7. The dose on hand is the amount given at one time. True False 12-1 Chapter 012 Methods of Dosage Calculation 8. The dosage ordered becomes the desired dose once it is converted into the same unit of measurement as the dose on hand. True False 9. In a proportion using fractions, units of measure from the fractions can be cancelled only if they are in the same portion of the fraction. True False 10. In a proportion of ratios, units of measure can be canceled if they are in the mean of one ratio and the extreme of the other ratio. True False 11. When using dimensional analysis, the desired dose, or unknown, stands alone on one side of the equation. True False 12. In a proportion, units from the two fractions can be canceled only when they are in the different portions of the fraction. True False 13. In a proportion using ratios, units can be canceled only when they are found in the same part of each of the ratios. True False 14. When using dimensional analysis, cancel units on the right side of the equation. The remaining unit of measure on the right side of the equation should match the unknown unit of measure on the left side of the equation. True False 12-2 Chapter 012 Methods of Dosage Calculation 15. In dimensional analysis, units can be canceled only when they are found in both numerators of the fractions. True False 16. The formula to calculate the amount to administer using the proportion method with fractions is H:Q=D:A. True False 17. The proportion method with ratios to determine the amount to administer uses the following formula and involves cross-multiplication: True False H / Q = D / A. 18. The formula method for calculating the amount to administer uses the formula: D/H ´ Q = A. True False 19. The desired dose is the amount of drug in the labeled container. True False 20. Dosage strength measures the amount of drug per dosage unit. True False 21. The dose on hand is the total amount of drug in the labeled container. True False 12-3 Chapter 012 Methods of Dosage Calculation 22. The amount to administer is the volume of a liquid or solid dosage units that contains the desired dose and is found by calculation. True False 23. There are three methods that can be used to calculate the desired dose: proportion, dimensional analysis, and formula methods. True False 24. To prevent calculation errors, always include units of measure. True False 25. When calculating the amount to administer, you can use any of the three methods (proportion, dimensional analysis, and formula method) and reach the same result. True False 12-4 Chapter 012 Methods of Dosage Calculation 26. The physician ordered Synthroid 0.05 mg. This is the label from the drug on hand. You will have to convert milligrams to micrograms to determine amount to administer. True False 27. The dosage strength of this medication is 0.05 mg/1 tablet. True False 28. The physician ordered 0.5 g of Zithromax four times daily for 3 days. The amount to administer is 12.5 mL. Refer to label for dosage on hand. True False 29. The dose on hand for this medication is 5 mL. True False 12-5 Chapter 012 Methods of Dosage Calculation 30. The dosage unit for this drug is tablets. True False Multiple Choice Questions 31. The dose on hand is found on which of the following documents? A. Medication Administration Record B. drug label C. medication card D. prescription 12-6 Chapter 012 Methods of Dosage Calculation 32. The _________________ is the amount of drug and frequency of administration ordered by the physician. A. dosage ordered B. desired dose C. dosage unit D. dose on hand 33. The desired dose must be in the same unit of measurement as the A. dosage strength. B. dosage unit. C. ratio strength. D. dose on hand. 34. The dosage ordered is found on which of the following? A. Medication Administration Record (MAR) B. eMAR C. drug label D. prescription 35. The prescription reads Paxil 40 mg po daily. Forty (40) mg is the A. dose on hand. B. dosage ordered. C. dosage unit. D. dosage strength. 36. The desired dose is A. the amount of drug contained in each dosage unit. B. the units by which a drug is measured when it is administered. C. the amount of drug contained in each dosage unit. D. the amount of drug to be given at a single time. 12-7 Chapter 012 Methods of Dosage Calculation 37. Which of the following is not used to calculate the desired dose? A. formula method B. proportion method using ratios C. dimensional analysis method D. proportion method using fractions 38. In a proportion using ratios, when can units of measure be canceled? A. They can never be canceled. B. When they are found in the same part of each ratio. C. When they are found in opposite parts of each ratio. D. When they are found in the first ratio. 39. The correct formula for calculating the amount to administer by the formula method is A. B. C. D. 40. Which of these is used to determine the amount to administer using proportion with ratios? A. B. H : Q = D : A C. D. 12-8 Chapter 012 Methods of Dosage Calculation 41. Which of these is used to determine the amount to administer using proportion with fractions? A. B. Q : H = A : D C. D. 42. The amount to administer is A. dose on hand per dosage unit. B. the amount of drug contained in each dosage unit. C. the volume of a liquid or the number of solid dosage units that contains the desired dose. D. the units by which the drug will be measured when it is administered. 43. The quantity of solid or liquid in which the dose is supplied is the A. dosage ordered B. dosage unit C. dosage strength D. supply dose 44. The supply dose is also known as the A. desired dose B. dose on hand C. dosage unit D. dosage strength 45. The dosage strength for Dilantin is A. 100 mg/ 1 tablet B. 30 mg / 1 tablet C. 30 mg / 1 capsule D. 100 mg / 1 capsule 12-9 Chapter 012 Methods of Dosage Calculation 46. The order for Synthroid is 0.1 mg per day. What is the amount to administer? A. 0.5 tablet B. 2 tablets C. 1 tablet D. 3 tablets 47. What is the dose on hand for Nitrostat ? A. 0.4 mg B. 1/100 gr/1 tablet C. tablet D. 100 tablets 12-10 Chapter 012 Methods of Dosage Calculation 48. What is the supply dose for this medication? A. 0.4 mg B. 1/150 gr / 1 tablet C. 1/150 gr D. tablet 49. What is the dosage strength of Flumadine ? A. Not given B. 1 tablet C. 100 mg D. 100 mg/1 tablet 50. The physician ordered 0.1g Flumadine po bid x 7 days. The amount to administer per dose will be A. 2 tablets B. 0.5 tablet C. 1 tablet D. 1.5 tablets 12-11 Chapter 012 Methods of Dosage Calculation 51. What is the dosage unit for amiodarone HCl? A. 1 mL B. 150 mg / 1 mL C. 50 mg D. 150 mg / 3 mL 52. The physician ordered 75 mg IV Stat. What is the amount to administer? A. 1 mL B. 1.5 mL C. 2 mL D. 2.5 mL 12-12 Chapter 012 Methods of Dosage Calculation 53. The physician ordered 87.5 mg po q 12 h for 10 days. What is the amount to administer? A. 5 mL B. 2.5 mL C. 3.5 mL D. 1 tsp 54. Physician order: 1.5 tsp po q 12 h for two days. What is the desired dose? A. 150 mg B. 7.5 mL C. 10 mL D. 187.5 mg 55. Ordered: 1 tsp po q 12 hr for 10 days. What is the desired dose? A. 125 mg B. 10 mL C. 5 mL D. 75 mg Fill in the Blank Questions 56. Ordered: diphenhydramine 50 mg po qhs prn. On hand: diphenhydramine 25 mg capsules. The amount to administer is __________. ________________________________________ 57. Ordered: Digoxin 0.125 mg po daily. On hand: Digoxin 0.25 mg scored tablets. The amount to administer is _____________. ________________________________________ 12-13 Chapter 012 Methods of Dosage Calculation 58. Ordered: Ferrous Fumarate 300 mg po tid. On hand: Ferrous Fumarate 100 mg/5 mL. The amount to administer is ____________. ________________________________________ 59. Refer to the label. Ordered: Vantin 200 mg po every 12 hours. See label for dosage on hand. The amount to administer is ______________. ________________________________________ 12-14 60. Ordered Vantin Chapter 012 Methods of Dosage Calculation 175 mg po q 12 hours See label for dose on hand Amount to administer:________. ________________________________________ 61. Ordered: EES Granules 360 mg q 6 hr. See label for dose on hand. The amount to administer is ______________. ________________________________________ 62. Ordered: EES Granules 100 mg q 6 hr. See label for dose on hand. The amount to administer is ______________. ________________________________________ 12-15 Chapter 012 Methods of Dosage Calculation 63. Ordered: Humalog 0.25 mL TID with meals. Refer to label for drug on hand. The desired dose is ______________. ________________________________________ 64. Ordered: EES Granules 2.5 mL q 6 hr. See label for dose on hand. The desired dose is ______________. ________________________________________ 65. Ordered: amiodarone HCl 150 mg IV now. On hand: See label. You will need ___________ vial(s) to administer this dose. ________________________________________ 66. Ordered: amiodarone HCl 75 mg IV now. On hand: see label. The amount to administer is ____________. ________________________________________ 12-16 Chapter 012 Methods of Dosage Calculation 67. Ordered: Ritalin® HCl 15mg. On hand: See label. The amount to administer is ____________. ________________________________________ 12-17 Chapter 012 Methods of Dosage Calculation 68. Ordered amoxicillin/clavulanate 875 mg every 12 hours. See label for medication on hand. (base dose on amount of amoxicillin available) The amount to administer is ________________. (round to nearest tenth) ________________________________________ 69. Ordered amoxicillin/clavulanate 450mg every 8 hours. See label for medication on hand. (base dose on amount of amoxicillin available) The amount to administer is ________________. (round to nearest hundredth) ________________________________________ 12-18 Chapter 012 Methods of Dosage Calculation 70. The dose on hand for this drug is ________________. ________________________________________ 71. What is the dosage unit? ________________________________________ 12-19 72. Ordered: Amicar Chapter 012 Methods of Dosage Calculation 1250 mg po q1 hour for 8 hours On hand: see label The amount to administer is ____________. ________________________________________ 73. Ordered: Erythromycin 0.5 g po every 6 hours. See label for available medication. The dose to administer is _______________. ________________________________________ 12-20 Chapter 012 Methods of Dosage Calculation 74. The dosage strength for Risperdal M-Tab is _______________. ________________________________________ 75. Ordered Risperdal 2.5 mg po daily at bedtime On hand: see label The amount to administer is __________. ________________________________________ 76. Ordered: Synthroid 125 mcg po daily. On hand: see label. The amount to administer is __________. ________________________________________ 77. Ordered: Phenobarbital gr ii po q 8h. On hand: Phenobarbital 60 mg per tablet The amount to administer is ____________. (Use gr i = 60 mg) ________________________________________ 12-21 78. Ordered: Levothroid Chapter 012 Methods of Dosage Calculation 0.168 mg. See label for dosage on hand. The amount to administer is ____________. ________________________________________ 79. Ordered: Levothroid 0.056 mg. See label for dosage on hand. The amount to administer is ____________. ________________________________________ 12-22 Chapter 012 Methods of Dosage Calculation 80. Refer to the figure above. Order: Increase patient's current dose of Celexa (10 mg) po daily by 20 mg per day starting next dose. See label for dosage on hand. The new amount to administer is ____________. ________________________________________ 81. Ordered: Celexa 20 mg po daily. See label for dosage on hand. The amount to administer is ____________. ________________________________________ 12-23 82. Ordered: Procardia Chapter 012 Methods of Dosage Calculation 30 mg TID. See label for dosage on hand. The total number of tablets needed per day is ____________. ________________________________________ 83. Ordered: Levothroid 0.224 mg po daily. On hand: see label. The amount to administer is ____________. ________________________________________ 12-24 Chapter 012 Methods of Dosage Calculation 84. Ordered: Furosemide 50 mg IV STAT On hand: see label. The amount to administer is ____________. ________________________________________ 85. Ordered: Furosemide 6.5 mL IV STAT On hand: see label The desired dose is _____________. ________________________________________ 86. Ordered: Demerol 75 mg IM q6h prn. On hand: Demerol 50 mg/mL. The amount to administer is ____________. ________________________________________ 12-25 Chapter 012 Methods of Dosage Calculation 87. Ordered: Aerobid -M 500 mcg BID. See label for medication available. The amount to administer is ____________. ________________________________________ 88. Ordered: Heparin 1000 units IV q 12h. On hand: Heparin 5000 units/mL. The amount to administer is ____________. ________________________________________ 12-26 89. Ordered Targretin Chapter 012 Methods of Dosage Calculation 525 mg PO daily On hand: see label The amount to administer is _______. ________________________________________ 90. Ordered Targretin 675 mg PO daily On hand: see label The amount to administer is _______. ________________________________________ 12-27 Chapter 012 Methods of Dosage Calculation 91. Ordered: Zofran 16 mg po q6h prn. On hand: Zofran 8 mg tablets. The amount to administer is ____________. ________________________________________ 92. Ordered: Penicillin 400 mg po q6h. On hand: Penicillin 250 mg/5 mL. The amount to administer is ____________. ________________________________________ 93. Ordered: Klonopin 1.25 mg po tid. On hand: Klonopin 0.5 mg scored tablets. The amount to administer is ____________. (use appropriate fractions) ________________________________________ 12-28 94. Ordered: Rocephin Chapter 012 Methods of Dosage Calculation 0.75 g IVSS daily On hand: see label The amount to administer is ________. ________________________________________ 95. Ordered: Rocephin 0.25 g IVSS q 12 h On hand: see label The amount to administer is ________. ________________________________________ 96. Ordered: Papaverine 45 mg IVSS q 8 hr. On hand: Papaverine 30 mg/mL. The amount to administer is ____________. ________________________________________ 97. Ordered: Pegaspargase 525 international units IM q 14 days On hand: Pegaspargase 750 international units/1mL. The amount to administer is ____________. ________________________________________ 98. Ordered: Rabeprazole sodium 60 mg po daily. On hand: Rabeprazole sodium 20 mg tablets. The amount to administer is ____________. ________________________________________ 99. Ordered: Acyclovir 500 mg po q 8 hr. On hand: Acyclovir 200 mg/5 mL oral suspension. The amount to administer is ____________. ________________________________________ 12-29 Chapter 012 Methods of Dosage Calculation 100. Ordered: Amantadine 200 mg po daily. On hand: Amantadine 50 mg/5 mL. The amount to administer is ____________. ________________________________________ 101. Ordered: Benazepril hydrochloride 20 mg daily. On hand: Benazepril hydrochloride 10 mg/tablet. The amount to administer is ____________. ________________________________________ 102. Ordered: Nelfinavir mesylate 1.25 g po bid. On hand: Nelfinavir mesylate 625 mg tablets. The amount to administer is ____________. ________________________________________ 12-30 Chapter 012 Methods of Dosage Calculation Key True / False Questions 1. (p. 261) The dosage ordered will be found on all drug labels. FALSE The dosage ordered will be found on the physician's order, prescription, or the medication administration record (MAR). Bloom's: Remembering Difficulty: Easy Learning Outcome: 12.1 Determine information needed to perform dosage calculation. 2. (p. 262) The prescription dosage unit and the dosage unit on hand will always be the same. FALSE The dosage ordered and the dose on hand are often expressed in different units of measurement. In these cases, the dosage ordered must be converted to the same unit of measurement as the dose on hand. Bloom's: Remembering Difficulty: Easy Learning Outcome: 12.1 Determine information needed to perform dosage calculation. 3. (p. 261) It is important to determine the desired dose before calculating the amount to administer. TRUE Before you calculate the amount to administer, it is first necessary to determine the desired dose. The desired dose tells you how many grams, milligrams, or grains of a drug the patient is to receive. The amount to administer tells you how many tablets, capsules, teaspoons, or milliliters of the medication must be given to deliver the desired dose. Bloom's: Remembering Difficulty: Easy Learning Outcome: 12.1 Determine information needed to perform dosage calculation. 12-31 Chapter 012 Methods of Dosage Calculation Key 4. (p. 263, 273) There will be a slight difference in the answer obtained when using proportion versus dimensional analysis calculation methods. FALSE Either of these methods will provide the same answer. Bloom's: Remembering Difficulty: Easy Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 5. (p. 262) The unit of measurement of the desired dose must be the same as the dose on hand. TRUE The unit of measurement of the desired dose must be the same as the dose on hand. Bloom's: Remembering Difficulty: Easy Learning Outcome: 12.1 Determine information needed to perform dosage calculation. 6. (p. 261) The dosage strength of a drug can be determined from the drug label. TRUE The dosage strength of a drug can be determined from the drug label. Bloom's: Remembering Difficulty: Easy Learning Outcome: 12.1 Determine information needed to perform dosage calculation. 7. (p. 262) The dose on hand is the amount given at one time. FALSE The dose on hand is the amount of drug contained in each dosage unit. Bloom's: Remembering Difficulty: Easy Learning Outcome: 12.1 Determine information needed to perform dosage calculation. 12-32 Chapter 012 Methods of Dosage Calculation Key 8. (p. 262) The dosage ordered becomes the desired dose once it is converted into the same unit of measurement as the dose on hand. TRUE The dosage ordered becomes the desired dose once it is converted into the same unit of measurement as the dose on hand. Bloom's: Remembering Difficulty: Easy Learning Outcome: 12.1 Determine information needed to perform dosage calculation. 9. (p. 263) In a proportion using fractions, units of measure from the fractions can be cancelled only if they are in the same portion of the fraction. TRUE In a proportion using fractions, units from the fractions can be cancelled only if they are in the same portion of the fraction. Units in the denominator of one fraction cannot be canceled with the units in the numerator of the other. Bloom's: Remembering Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 10. (p. 267) In a proportion of ratios, units of measure can be canceled if they are in the mean of one ratio and the extreme of the other ratio. FALSE In a proportion of ratios, units can be canceled only when they are found in the same part of each of the ratios. Bloom's: Remembering Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 12-33 Chapter 012 Methods of Dosage Calculation Key 11. (p. 265, 277) When using dimensional analysis, the desired dose, or unknown, stands alone on one side of the equation. TRUE When using dimensional analysis, the desired dose, or unknown, stands alone on one side of the equation. Bloom's: Remembering Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 12. (p. 263, 273) In a proportion, units from the two fractions can be canceled only when they are in the different portions of the fraction. FALSE In a proportion, units from the two fractions can be canceled only when they are in the same portion of the fraction. Units in the denominator of one fraction cannot be canceled with units found in the numerator of the other. Bloom's: Remembering Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 13. (p. 263, 273) In a proportion using ratios, units can be canceled only when they are found in the same part of each of the ratios. TRUE In a proportion using ratios, units can be canceled only when they are found in the same part of each of the ratios. Bloom's: Remembering Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 12-34 Chapter 012 Methods of Dosage Calculation Key 14. (p. 265, 277) When using dimensional analysis, cancel units on the right side of the equation. The remaining unit of measure on the right side of the equation should match the unknown unit of measure on the left side of the equation. TRUE When using dimensional analysis, cancel units on the right side of the equation. The remaining unit of measure on the right side of the equation should match the unknown unit of measure on the left side of the equation. Bloom's: Remembering Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 15. (p. 267) In dimensional analysis, units can be canceled only when they are found in both numerators of the fractions. FALSE In dimensional analysis, units can be canceled only when they are found in both the numerator and the denominator of the fraction. Bloom's: Remembering Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 16. (p. 273) The formula to calculate the amount to administer using the proportion method with fractions is H:Q=D:A. FALSE The formula for the fraction proportion method to calculate the amount to administer is D / A . Bloom's: Remembering Difficulty: Medium Learning Outcome: 12.2 Utilize three methods of dosage calculations. 12-35 H / Q = Chapter 012 Methods of Dosage Calculation Key 17. (p. 273) The proportion method with ratios to determine the amount to administer uses the following formula and involves cross-multiplication: FALSE H / Q = D / A. The proportion method using ratio to determine the amount to administer uses the following formula and involves multiplying the means and extremes. H : A = D : A. Bloom's: Applying Difficulty: Easy Learning Outcome: 12.2 Utilize three methods of dosage calculations. 18. (p. 280) The formula method for calculating the amount to administer uses the formula: D/H ´ Q = A. TRUE The formula method for calculating the amount to administer uses the formula: D/H ´ Q = A. Bloom's: Applying Difficulty: Easy Learning Outcome: 12.2 Utilize three methods of dosage calculations. 19. (p. 262) The desired dose is the amount of drug in the labeled container. FALSE The desired dose is the amount of actual drug to be administered at one time. Bloom's: Remembering Difficulty: Easy Learning Outcome: 12.1 Determine information needed to perform dosage calculation. 20. (p. 262) Dosage strength measures the amount of drug per dosage unit. TRUE Dosage strength measures the amount of drug per dosage unit. Bloom's: Remembering Difficulty: Easy Learning Outcome: 12.1 Determine information needed to perform dosage calculation. 12-36 Chapter 012 Methods of Dosage Calculation Key 21. (p. 262) The dose on hand is the total amount of drug in the labeled container. FALSE The dose on hand is the amount of drug present in a dosage unit. Bloom's: Remembering Difficulty: Easy Learning Outcome: 12.1 Determine information needed to perform dosage calculation. 22. (p. 262) The amount to administer is the volume of a liquid or solid dosage units that contains the desired dose and is found by calculation. TRUE The amount to administer is the volume of a liquid or solid dosage units that contains the desired dose and is found by calculation. Bloom's: Remembering Difficulty: Easy Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 23. (p. 261) There are three methods that can be used to calculate the desired dose: proportion, dimensional analysis, and formula methods. FALSE There are two methods that can be used to calculate the desired dose. The formula method is not used to calculate desired dose. Bloom's: Remembering Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. 12-37 Chapter 012 Methods of Dosage Calculation Key 24. (p. 261) To prevent calculation errors, always include units of measure. TRUE To prevent calculation errors, always include units of measure. Bloom's: Remembering Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 25. (p. 271) When calculating the amount to administer, you can use any of the three methods (proportion, dimensional analysis, and formula method) and reach the same result. TRUE When calculating the amount to administer, you can use any of the three methods (proportion, dimensional analysis, and formula method) and reach the same result. Bloom's: Remembering Difficulty: Medium Learning Outcome: 12.2 Utilize three methods of dosage calculations. 12-38 Chapter 012 Methods of Dosage Calculation Key 26. (p. 262) The physician ordered Synthroid 0.05 mg. This is the label from the drug on hand. You will have to convert milligrams to micrograms to determine amount to administer. FALSE You do not have to convert as the drug is labeled in both milligrams and micrograms. Bloom's: Applying Difficulty: Easy Learning Outcome: 12.1 Determine information needed to perform dosage calculation. 27. (p. 262) The dosage strength of this medication is 0.05 mg/1 tablet. TRUE The dosage strength of this medication is 0.05 mg / 1 tablet. Bloom's: Understanding Difficulty: Easy Learning Outcome: 12.1 Determine information needed to perform dosage calculation. 12-39 Chapter 012 Methods of Dosage Calculation Key 28. (p. 273) The physician ordered 0.5 g of Zithromax four times daily for 3 days. The amount to administer is 12.5 mL. Refer to label for dosage on hand. TRUE H = 200 mg; Q = 5 mL; D = 0.5 g Step A - Convert: x : 0.5 g = 1000mg : 1 g; x = 500 mg Step B - Calculate: 500 mg/200 mg x 5 mL = A 12.5 mL = ADesired dose (500mg) is greater than dose on hand (200 mg) by 2.5 times so it is reasonable. Bloom's: Applying Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 29. (p. 262) The dose on hand for this medication is 5 mL. FALSE The dose on hand is 200 mg; 5 mL is the dosage unit. Bloom's: Understanding Difficulty: Easy Learning Outcome: 12.1 Determine information needed to perform dosage calculation. 12-40 Chapter 012 Methods of Dosage Calculation Key 30. (p. 262) The dosage unit for this drug is tablets. FALSE The dosage unit is capsules. Bloom's: Understanding Difficulty: Easy Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Multiple Choice Questions 31. (p. 262) The dose on hand is found on which of the following documents? A. Medication Administration Record B. drug label C. medication card D. prescription The dose on hand can be found on the drug label. Bloom's: Remembering Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. 32. (p. 262) The _________________ is the amount of drug and frequency of administration ordered by the physician. A. dosage ordered B. desired dose C. dosage unit D. dose on hand The dosage ordered is the amount of drug and frequency of administration ordered by the physician. Bloom's: Remembering Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. 12-41 Chapter 012 Methods of Dosage Calculation Key 33. (p. 262) The desired dose must be in the same unit of measurement as the A. dosage strength. B. dosage unit. C. ratio strength. D. dose on hand. The desired dose must be in the same unit of measurement as the dose on hand. Bloom's: Remembering Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. 34. (p. 262) The dosage ordered is found on which of the following? A. Medication Administration Record (MAR) B. eMAR C. drug label D. prescription The dosage ordered is found on the prescription. Bloom's: Remembering Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. 35. (p. 262) The prescription reads Paxil 40 mg po daily. Forty (40) mg is the A. dose on hand. B. dosage ordered. C. dosage unit. D. dosage strength. 40 mg of Paxil is the dosage ordered. Bloom's: Remembering Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. 12-42 Chapter 012 Methods of Dosage Calculation Key 36. (p. 262) The desired dose is A. the amount of drug contained in each dosage unit. B. the units by which a drug is measured when it is administered. C. the amount of drug contained in each dosage unit. D. the amount of drug to be given at a single time. The desired dose is the amount of drug to be given at a single time. Bloom's: Remembering Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. 37. (p. 280) Which of the following is not used to calculate the desired dose? A. formula method B. proportion method using ratios C. dimensional analysis method D. proportion method using fractions The formula method is not used to calculate the desired dose. Bloom's: Understanding Difficulty: Easy Learning Outcome: 12.1 Determine information needed to perform dosage calculation. 38. (p. 267, 273) In a proportion using ratios, when can units of measure be canceled? A. They can never be canceled. B. When they are found in the same part of each ratio. C. When they are found in opposite parts of each ratio. D. When they are found in the first ratio. In a ratio proportion, units of measure can be cancelled when they are found in the same part of each ratio. Bloom's: Remembering Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 12-43 Chapter 012 Methods of Dosage Calculation Key 39. (p. 280) The correct formula for calculating the amount to administer by the formula method is A. B. C. D. The correct formula for calculating the amount to administer by the formula method is . Bloom's: Remembering Difficulty: Medium Learning Outcome: 12.2 Utilize three methods of dosage calculations. 40. (p. 273) Which of these is used to determine the amount to administer using proportion with ratios? A. B. H : Q = D : A C. D. The proportion method using ratios used to determine the amount to administer is set up as H : Q = D : A. Bloom's: Remembering Difficulty: Medium Learning Outcome: 12.2 Utilize three methods of dosage calculations. 12-44 Chapter 012 Methods of Dosage Calculation Key 41. (p. 273) Which of these is used to determine the amount to administer using proportion with fractions? A. B. Q : H = A : D C. D. The proportion used to determine the amount to administer is Bloom's: Remembering Difficulty: Medium Learning Outcome: 12.2 Utilize three methods of dosage calculations. 42. (p. 262) The amount to administer is A. dose on hand per dosage unit. B. the amount of drug contained in each dosage unit. C. the volume of a liquid or the number of solid dosage units that contains the desired dose. D. the units by which the drug will be measured when it is administered. The amount to administer is the volume of a liquid or the number of solid dosage units that contains the desired dose. Bloom's: Remembering Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. 12-45 Chapter 012 Methods of Dosage Calculation Key 43. (p. 262) The quantity of solid or liquid in which the dose is supplied is the A. dosage ordered B. dosage unit C. dosage strength D. supply dose The quantity of solid or liquid in which the dose is supplied is the dosage unit. Bloom's: Remembering Difficulty: Easy Learning Outcome: 12.1 Determine information needed to perform dosage calculation. 44. (p. 262) The supply dose is also known as the A. desired dose B. dose on hand C. dosage unit D. dosage strength The supply dose is also known as the dosage strength. Bloom's: Remembering Difficulty: Easy Learning Outcome: 12.1 Determine information needed to perform dosage calculation. 45. (p. 262) The dosage strength for Dilantin is A. 100 mg/ 1 tablet B. 30 mg / 1 tablet C. 30 mg / 1 capsule D. 100 mg / 1 capsule The dosage strength is 30 mg / 1 capsule. Bloom's: Understanding Difficulty: Easy Learning Outcome: 12.1 Determine information needed to perform dosage calculation. 12-46 Chapter 012 Methods of Dosage Calculation Key 46. (p. 273) The order for Synthroid is 0.1 mg per day. What is the amount to administer? A. 0.5 tablet B. 2 tablets C. 1 tablet D. 3 tablets H = 50 mg Q = 1 tablet; D = 0.1 mg Step A convert - milligram microgram equivalents listed on label. Step B calculate - 0.1 mg/0.05mg x 1 tablet = A 2 x 1 tab = 2 tablets = A Step C dose ordered is twice that of dose on hand - it is reasonable. Bloom's: Applying Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 12-47 Chapter 012 Methods of Dosage Calculation Key 47. (p. 262) What is the dose on hand for Nitrostat ? A. 0.4 mg B. 1/100 gr/1 tablet C. tablet D. 100 tablets The dose on hand is the amount of drug contained in each dosage unit. Bloom's: Understanding Difficulty: Easy Learning Outcome: 12.1 Determine information needed to perform dosage calculation. 48. (p. 262) What is the supply dose for this medication? A. 0.4 mg B. 1/150 gr / 1 tablet C. 1/150 gr D. tablet Supply dose is the same as dosage strength: the dose on hand per dosage unit. Bloom's: Understanding Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. 49. (p. 262) What is the dosage strength of Flumadine ? A. Not given B. 1 tablet C. 100 mg D. 100 mg/1 tablet Dosage strength is the dose on hand per dosage unit. Bloom's: Understanding Difficulty: Easy Learning Outcome: 12.1 Determine information needed to perform dosage calculation. 12-48 Chapter 012 Methods of Dosage Calculation Key 50. (p. 273, 277, 280) The physician ordered 0.1g Flumadine po bid x 7 days. The amount to administer per dose will be A. 2 tablets B. 0.5 tablet C. 1 tablet D. 1.5 tablets H = 100 mg; Q = 1 tablet; D = 01 g Step A Convert - x:0.1 g = 1000 mg/1 g; 0.1 x 1000mg = x x 1; 100 mg = x Step B Calculate - not necessary as dosage on hand = desired dose (100mg); dosage strength is 100 mg/ 1 tablet so amount to administer is 1 tablet. Step C Dose ordered is equal to the dose on hand, so it is reasonable. Bloom's: Applying Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 12-49 Chapter 012 Methods of Dosage Calculation Key 51. (p. 262) What is the dosage unit for amiodarone HCl? A. 1 mL B. 150 mg / 1 mL C. 50 mg D. 150 mg / 3 mL The dosage unit is the quantity of solid or liquid in which the dose is supplied. In this case it is milliliter. Bloom's: Understanding Difficulty: Easy Learning Outcome: 12.1 Determine information needed to perform dosage calculation. 52. (p. 273, 277, 280) The physician ordered 75 mg IV Stat. What is the amount to administer? A. 1 mL B. 1.5 mL C. 2 mL D. 2.5 mL H = 50 mg; Q = 1 mL; D = 75 mg Step A - no conversion needed. Step B x : 75 mg = 1 mL : 50 mg; 75 x 1 mL = x x 50, divide both sides by 50; x = 1.5 mL Step C referring to the label there are 150 mg/3 mL; 75 mg is half of 150 mg so the amount to administer is reasonable. Bloom's: Applying Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 12-50 Chapter 012 Methods of Dosage Calculation Key 53. (p. 273, 277, 280) The physician ordered 87.5 mg po q 12 h for 10 days. What is the amount to administer? A. 5 mL B. 2.5 mL C. 3.5 mL D. 1 tsp D = 125 mg; Q = 5 mL; D = 87.5 mg Step A no conversion necessary Step B 125 x A = 87.5 x 5 mL 125A / 125 = 437.5 mL / 125 A = 3.5 mL Step C 87.5 mg is less than 125 mg so the amount to administer will be less than 5 mL so it is reasonable. Bloom's: Applying Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 12-51 125 mg / 5mL = 87.5mg / A Chapter 012 Methods of Dosage Calculation Key 54. (p. 263) Physician order: 1.5 tsp po q 12 h for two days. What is the desired dose? A. 150 mg B. 7.5 mL C. 10 mL D. 187.5 mg H = 125 mg; Q = 5 mL; A = 1.5 tsp Step A x : 1.5 tsp = 5 mL : 1 tsp; 1.5 x 5 mL = x x 1; 7.5 mL = x Step B 125 mg : 5 mL = D : 7.5 mL 5 x D = 125 mg x 7.5 5D / 5 = 937.5 mL D = 187.5 mg Step C 5 mL = 1 tsp dose ordered is 1.5 times dose on hand; desired dose is 1.5 times dose on hand so it is reasonable. Bloom's: Understanding Difficulty: Hard Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 55. (p. 263) Ordered: 1 tsp po q 12 hr for 10 days. What is the desired dose? A. 125 mg B. 10 mL C. 5 mL D. 75 mg H = 125 mg; Q = 5 mL; A = 1 tsp Step A 1 tsp = 5 mL Step B Not necessary as dose on hand is 125 mg / 5 mL so desired dose is 125 mg Bloom's: Understanding Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 12-52 / 5 Chapter 012 Methods of Dosage Calculation Key Fill in the Blank Questions 56. (p. 273, 277, 280) Ordered: diphenhydramine 50 mg po qhs prn. On hand: diphenhydramine 25 mg capsules. The amount to administer is __________. 2 capsules D = 50 mg; H = 25 mg; Q = 1 capsule Step A no conversion needed Step B 25 mg/ 1 cap = 50 mg / A 25 x A = 50 x 1 divide both side by 25 A = 2 capsules Step C dose ordered (50 mg) is twice the dose on hand (25 mg) so it is reasonable Bloom's: Applying Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 57. (p. 273, 277, 280) Ordered: Digoxin 0.125 mg po daily. On hand: Digoxin 0.25 mg scored tablets. The amount to administer is _____________. 0.5 tablet H = 0.25 mg; Q = 1 tablet; D 0.125 Step A no conversion necessary Step B x 1 tablet = A 0.5 tablet = A Step C 0.25 mg is twice 0.125 mg so a half tablet is reasonable Bloom's: Applying Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 58. (p. 273, 277, 280) Ordered: Ferrous Fumarate 300 mg po tid. On hand: Ferrous Fumarate 100 mg/5 mL. The amount to administer is ____________. 15 mL H = 100 mg; Q = 5 mL; D = 300 mg Step A no conversion necessary. Step B x 5 mL = A 3 x 5 mL = 15 mL = A Step C dose ordered is 3 times dose on hand so it is reasonable. Bloom's: Applying Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 12-53 0.125mg 300mg / 0.25mg / 100mg Chapter 012 Methods of Dosage Calculation Key 59. (p. 273, 277, 280) Refer to the label. Ordered: Vantin 200 mg po every 12 hours. See label for dosage on hand. The amount to administer is ______________. 20 mL H = 50 mg; Q = 5 mL; D = 200 mg Step A no conversion needed Step B 50mg 50 x A = 5 mL x 200 50A / 50 = 1000 mL / 50 A = 20 mL Step C 200 mg is 4 times larger than 50 mg so it is reasonable Bloom's: Applying Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 12-54 / 5mL = 200mg / A Chapter 012 Methods of Dosage Calculation Key 60. (p. 273, 277, 280) Ordered Vantin 175 mg po q 12 hours See label for dose on hand Amount to administer:________. 17.5 mL H = 50 mg; Q = 5 mL; D = 200 mg Step A no conversion necessary Step B 175mg x 5 mL = A 3.5 x 5 mL = A 17.5 mL = A Step C 175 mg is greater than 3 times the dose on hand but less than 4 times greater so the answer should fall between 15 mL and 10 mL. It is reasonable. Bloom's: Applying Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 12-55 / 50mg Chapter 012 Methods of Dosage Calculation Key 61. (p. 273, 277, 280) Ordered: EES Granules 360 mg q 6 hr. See label for dose on hand. The amount to administer is ______________. 9 mL H = 200 mg; Q = 5 mL; D = 360 mg Step A no conversion needed Step B 360 mg x 5 mL = A 1.8 x 5 mL = A = 9 mL Step C dose ordered is slightly less than two times dose on hand so it is reasonable. Bloom's: Applying Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 62. (p. 273, 277, 280) Ordered: EES Granules 100 mg q 6 hr. See label for dose on hand. The amount to administer is ______________. 2.5 mL H = 200 mg; Q = 5 mL; D = 100 mg Step A no conversion needed Step B 100 mg x 5 mL = A 0.5 x 5 mL = A = 2.5 mL Step C dose ordered is half of dose on hand so it is reasonable. Bloom's: Applying Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 12-56 / 200mg / 200mg Chapter 012 Methods of Dosage Calculation Key 63. (p. 263) Ordered: Humalog 0.25 mL TID with meals. Refer to label for drug on hand. The desired dose is ______________. 25 units H = 100 units; Q = 1 mL; A = 0.25 mL Step A no conversion needed Step B / 0.25 mL 100 units x 0.25 = 1 x D 25 units = D Step C 0.25 is a fourth of 1 mL and 25 units is a fourth of 100 units; so the dose is reasonable. Bloom's: Applying Difficulty: Hard Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 64. (p. 263) Ordered: EES Granules 2.5 mL q 6 hr. See label for dose on hand. The desired dose is ______________. 100 mg H = 200 mg; Q = 5 mL; A = 2.5 mL Step A no conversion needed Step B 200mg x 2.5 = 5 x D 500mg / 5 = 5D / 5 100 units 200 mg 100 mg = D Step C the amount ordered is half of dosage unit so it is reasonable. Bloom's: Applying Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 65. (p. 273, 277, 280) Ordered: amiodarone HCl 150 mg IV now. On hand: See label. You will need ___________ vial(s) to administer this dose. 1 As per the label, the vial holds 150 mg / 3 mL. The ordered dose is 150 mg, so you only need one vial of amiodarone to administer this amount. Bloom's: Applying Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 12-57 / 5 mL / 1 mL = D = D / 2.5mL Chapter 012 Methods of Dosage Calculation Key 66. (p. 273, 277, 280) Ordered: amiodarone HCl 75 mg IV now. On hand: see label. The amount to administer is ____________. 1.5 mL H = 50 mg; Q = 1 mL; D = 75 mg Step A no conversion needed Step B 75mg / 50mg x 1 mL =A 1.5 x 1 mL = A = 1.5 mL Step C dose ordered is greater than dose on hand but less than 2 times that dose so it is reasonable. Bloom's: Applying Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 12-58 Chapter 012 Methods of Dosage Calculation Key 67. (p. 273, 277, 280) Ordered: Ritalin® HCl 15mg. On hand: See label. The amount to administer is ____________. 3 tablets H = 5 mg; Q = 1 tablet ; D = 15 mg Step A no conversion needed Step B 15mg x 1tablet = A 3 X 1 tablet = A = 3 tablets Step C dose ordered is 3 times dose on hand so it is reasonable. Bloom's: Applying Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 12-59 / 5mg Chapter 012 Methods of Dosage Calculation Key 68. (p. 273, 277, 280) Ordered amoxicillin/clavulanate 875 mg every 12 hours. See label for medication on hand. (base dose on amount of amoxicillin available) The amount to administer is ________________. (round to nearest tenth) 7.3 mL H = 600 mg; Q = 5 mL; D = 875 mg Step A no conversion needed Step B 875 mg x 5 mL = A 1.46 x 5 mL =A= 7.3 mL Step C dose ordered is greater than dose on hand and slightly more than 1.5 times the dose on hand so it is reasonable. Bloom's: Applying Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 69. (p. 273, 277, 280) Ordered amoxicillin/clavulanate 450mg every 8 hours. See label for medication on hand. (base dose on amount of amoxicillin available) The amount to administer is ________________. (round to nearest hundredth) 3.75 mL H = 600 mg; Q = 5 mL; D = 450 mg Step A no conversion needed Step B 450 mg x 5 mL = A 0.75 x 5 mL =A= 3.75 mL Step C dose ordered is greater than dose on hand and slightly more than 1.5 times the dose on hand so it is reasonable. Bloom's: Applying Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 12-60 / 600 mg / 600 mg Chapter 012 Methods of Dosage Calculation Key 70. (p. 263) The dose on hand for this drug is ________________. 1.25 g The dose on hand for Amicar is 1.25 g. Bloom's: Applying Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. 12-61 Chapter 012 Methods of Dosage Calculation Key 71. (p. 262) What is the dosage unit? 5 mL The dosage unit for Amicar is 5 mL Bloom's: Applying Difficulty: Easy Learning Outcome: 12.1 Determine information needed to perform dosage calculation. 72. (p. 273, 277, 280) Ordered: Amicar 1250 mg po q1 hour for 8 hours On hand: see label The amount to administer is ____________. 5 mL H = 1.25 g; Q = 5 mL; D = 1250 mg Step A 1g:1000 mg = x : 1250 mg 1000 x x = 1 g x 1250 1000x / 1000 = 1250g / 1000 x = 1.25 g Step B not necessary as label indicates dosage strength is 1.25 g / 5 mL The amount to administer is 5 mL Step C Dose ordered is equal to the dose on hand, so it is reasonable. Bloom's: Applying Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 73. (p. 273, 277, 280) Ordered: Erythromycin 0.5 g po every 6 hours. See label for available medication. The dose to administer is _______________. 12.5 mL H = 200 mg ; Q = 5 mL; O = 0.5 g Step A D mg = 500mg / 200 mg 1000 mg / 1 g x 0.5 g / 1 D mg = 500 mg Step B x 5 mL 2.5 x 5 mL = A = 12.5 mL Step C dose on hand is 2.5 times less than desired dose so it is reasonable Bloom's: Applying Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 12-62 Chapter 012 Methods of Dosage Calculation Key 74. (p. 262) The dosage strength for Risperdal M-Tab is _______________. 0.5 mg / 1 tablet The dosage strength is 0.5 mg/1 tablet Bloom's: Understanding Difficulty: Easy Learning Outcome: 12.1 Determine information needed to perform dosage calculation. 12-63 Chapter 012 Methods of Dosage Calculation Key 75. (p. 273, 277, 280) Ordered Risperdal 2.5 mg po daily at bedtime On hand: see label The amount to administer is __________. 5 tablets H = 0.5 mg; Q = 1 tablet; D = 2.5 mg Step A no conversion needed Step B 2.5 mg x 1 tablet = A 5 tablets = A Step C dose ordered it 5 times the dose on hand so amount to administer is reasonable. Bloom's: Understanding Difficulty: Easy Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 76. (p. 273, 277, 280) Ordered: Synthroid 125 mcg po daily. On hand: see label. The amount to administer is __________. 2 1/2 tablets H = 50 mcg; Q = 1 tablet; D = 125 mcg Step A no conversion needed Step B x 1 tablet 2 1/2 ´ 1 tablet = A 2 1/2 tablets = A Step C desired dose is 2.5 times that of dose on hand so it is reasonable Bloom's: Applying Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 77. (p. 273, 277, 280) Ordered: Phenobarbital gr ii po q 8h. On hand: Phenobarbital 60 mg per tablet The amount to administer is ____________. (Use gr i = 60 mg) 2 tablets H = 60 mg; Q = 1 tablet; O = gr ii Step A D : 2 gr = 60 mg: 1 gr 2 x 60 mg = D x 1 120 mg = D Step B 120 mg / 60mg x 1 tablet 2 x 1 tablet = D = 2 tablets Step C gr i equal 60 mg and dose ordered is twice this so it is reasonable Bloom's: Applying Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 12-64 / 0.5 mg 125 mcg / 50 mcg Chapter 012 Methods of Dosage Calculation Key 78. (p. 273, 277, 280) Ordered: Levothroid 0.168 mg. See label for dosage on hand. The amount to administer is ____________. 1 1/2 tablets H = 112 mcg; Q = 1 tablet; O = 0.168mg Step A 1000mcg / 1 mg = D / 0 . 168 mg 1000 mcg x 0.168 = D x 1 168 mcg = D Step B 168 mcg / 112 mcg x 1 tablet = A 1 1/2 tablet = A Step C dose ordered is one and a half times greater than dose on hand so it is reasonable Bloom's: Applying Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 12-65 Chapter 012 Methods of Dosage Calculation Key 79. (p. 273, 277, 280) Ordered: Levothroid 0.056 mg. See label for dosage on hand. The amount to administer is ____________. 1/2 tablet H = 112 mcg; Q = 1 tablet; O = 0.056 mg Step A 1000mcg / 1 mg = D / 0 . 056 mg 1000 mcg x 0.56 = D x 1 56 mcg = D Step B 56 mcg / 112 mcg x 1 tablet = A 1/2 tablet = A Step C dose ordered is half the dose on hand so it is reasonable Bloom's: Applying Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 12-66 Chapter 012 Methods of Dosage Calculation Key 80. (p. 273, 277, 280) Refer to the figure above. Order: Increase patient's current dose of Celexa (10 mg) po daily by 20 mg per day starting next dose. See label for dosage on hand. The new amount to administer is ____________. 3 tablets H = 10 mg; Q = 1 tablet; D = 30 mg Step A no conversion needed Step B 30 mg x 1 tablet = A 3 x 1 tablet = A = 3 tablets Step C dose ordered is three times greater than dose on hand so it is reasonable Bloom's: Applying Difficulty: Hard Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 81. (p. 273, 277, 280) Ordered: Celexa 20 mg po daily. See label for dosage on hand. The amount to administer is ____________. 2 tablets H = 10 mg; Q = 1 tablet; D = 30 mg Step A no conversion needed Step B 20 mg x 1 tablet = A 2 x 1 tablet = A = 2 tablets Step C dose ordered is twice greater than dose on hand so it is reasonable Bloom's: Applying Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 12-67 / 10 mg / 10 mg Chapter 012 Methods of Dosage Calculation Key 82. (p. 273, 277, 280) Ordered: Procardia 30 mg TID. See label for dosage on hand. The total number of tablets needed per day is ____________. 9 capsules H = 10 mg; Q = 1 capsule; D = 30 mg Step A no conversion needed Step B x 1 capsule = A 3 x 1 capsule = A = 3 capsules 3 capsules per dose x 3 doses per day = 9 capsules Step C dose ordered is three times greater than dose on hand; patient to receive dose 3 times daily so it is reasonable Bloom's: Applying Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 83. (p. 273, 277, 280) Ordered: Levothroid 0.224 mg po daily. On hand: see label. The amount to administer is ____________. 2 tablets H = 112 mcg; Q = 1 tablet; D = 0.224 mg Step A 1000 mcg: 1mg = D : 0.224 mg 1 x D = 1000 mcg x 0.224 D = 224 mcg Step B 224 mcg / 112 mcg x 1 tablet = A 2 x 1 tablet = A = 2 tablets Step C dose ordered is twice the dose on hand so it is reasonable Bloom's: Applying Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 12-68 30 mg / 10 mg Chapter 012 Methods of Dosage Calculation Key 84. (p. 273, 277, 280) Ordered: Furosemide 50 mg IV STAT On hand: see label. The amount to administer is ____________. 5 mL H = 20 mg; Q = 4 mL; D = 50 mg Step A no conversion needed Step B 50 mg x 4 mL = A 1.25 x 4 mL = A = 5 mL Step C dose ordered is slightly greater than dose on hand so it is reasonable Bloom's: Applying Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 85. (p. 263) Ordered: Furosemide 6.5 mL IV STAT On hand: see label The desired dose is _____________. 65 mg H = 20 mg; Q = 4 mL; A = 6.5 mL Step A no conversion needed Step B 40 mg 4 x D = 40 mg x 6.5 4D / 4 = 260 mg / 4 D = 65 mg Step C amount ordered is just over 1.5 times the dosage unit and desired dose is just over 1.5 times the dose on hand so it is reasonable Bloom's: Applying Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 12-69 / 40 mg / 4mL = D / 6.5 mL Chapter 012 Methods of Dosage Calculation Key 86. (p. 273, 277, 280) Ordered: Demerol 75 mg IM q6h prn. On hand: Demerol 50 mg/mL. The amount to administer is ____________. 1.5 mL H = 50 mg; Q = 1 mL; D = 75 mg Step A no conversion needed Step B 75 mg x 1 mL = A 1.5 x 1 mL = A = 1.5 mL Step C dose ordered is 1.5 times greater than dose on hand so it is reasonable Bloom's: Applying Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 87. (p. 273, 277, 280) Ordered: Aerobid -M 500 mcg BID. See label for medication available. The amount to administer is ____________. 2 inhalations H = 250 mcg; Q = 1inhalation; D = 500 mcg Step A no conversion needed Step B / 50 mg x 1 inhalation = A 2 x 1 inhalation = A = 2 inhalations Step C dose ordered is twice the dose on hand so it is reasonable Bloom's: Applying Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 12-70 500 mcg / 250 mg Chapter 012 Methods of Dosage Calculation Key 88. (p. 273, 277, 280) Ordered: Heparin 1000 units IV q 12h. On hand: Heparin 5000 units/mL. The amount to administer is ____________. 0.2 mL H = 1000 units; Q = 1 mL; D = 1000 mg Step A no conversion needed Step B x 1 mL = A 0.2 x 1 mL = A = 0.2 mL Step C dose ordered is a fifth of the dose on hand so amount to administer is reasonable Bloom's: Applying Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 12-71 1000 units / 5000 units Chapter 012 Methods of Dosage Calculation Key 89. (p. 273, 277, 280) Ordered Targretin 525 mg PO daily On hand: see label The amount to administer is _______. 7 capsules H = 75 mg; Q = 1 capsule; D = 525 mg Step A no conversion needed Step B x 1 capsule = A 7 x 1 capsule = A = 7 capsules Step C dose ordered is greater than 5 times the dose on hand but less than 10 times dose on hand so it is reasonable, however 7 capsules is unreasonable. Bloom's: Applying Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 90. (p. 273, 277, 280) Ordered Targretin 675 mg PO daily On hand: see label The amount to administer is _______. 9 capsules H = 75 mg; Q = 1 capsule; D = 675 mg Step A no conversion needed Step B x 1 capsule = A 9 x 1 capsule = A = 9 capsules Step C dose ordered is almost 10 times the dose on hand so it is reasonable, however 9 capsules is unreasonable. Bloom's: Applying Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 12-72 525 mg 675 mg / 75 mg / 75 mg Chapter 012 Methods of Dosage Calculation Key 91. (p. 273, 277, 280) Ordered: Zofran 16 mg po q6h prn. On hand: Zofran 8 mg tablets. The amount to administer is ____________. 2 tablets H = 18 mg; Q = 1 tablet; D = 16 mg Step A no conversion needed Step B 16 mg x 1 tablet = A 2 x 1 tablet = A = 2 tablets Step C dose ordered is twice than dose on hand so it is reasonable Bloom's: Applying Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 92. (p. 273, 277, 280) Ordered: Penicillin 400 mg po q6h. On hand: Penicillin 250 mg/5 mL. The amount to administer is ____________. 8 mL H = 250 mg; Q = 5 mL; D = 400 mg Step A no conversion needed Step B / 8 mg 400 mg x 5 mL = A 1.6 x 5 mL = A = 8 mL Step C dose ordered is slightly more than half than dose on hand so it is reasonable Bloom's: Applying Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 93. (p. 273, 277, 280) Ordered: Klonopin 1.25 mg po tid. On hand: Klonopin 0.5 mg scored tablets. The amount to administer is ____________. (use appropriate fractions) 2 1/2 tablets H = 0.5 mg; Q = 1 tablet; D = 1.25 mg Step A no conversion needed Step B x 1 tablet = A 2 1/2 x 1 tablet = A = 2 1/2 tablets Step C dose ordered is more than twice dose on hand but less than 3 times the dose on hand so it is reasonable Bloom's: Applying Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 12-73 / 250 mg 1.25 mg / .05 mg Chapter 012 Methods of Dosage Calculation Key 94. (p. 273, 277, 280) Ordered: Rocephin 0.75 g IVSS daily On hand: see label The amount to administer is ________. 22.5 mL H = 500 mg; Q = 15 mL; D = 0.75 g Step A x : 0.75 g = 1000 mg : 1 g 0.75 x 1000 mg = x x 1 750 mg = x Step B 750 mg / 500 mg x 15 mL = A 1.5 x 15 mL = A = 22.5 mL Step C dose ordered is greater than dose on hand but not twice the dose so it is reasonable Bloom's: Applying Difficulty: Medium Learning Outcome: 12.1 Determine information needed to perform dosage calculation. Learning Outcome: 12.2 Utilize three methods of dosage calculations. 12-74 Chapter 012 Methods of Dosage Calculation Key 95. (p. 273, 277, 280) Ordered: Rocephin 0.25 g IVSS q 12 h On hand: see label The amount to administer is ________. 7.5 mL H = 500 mg; Q = 15 mL; D = 0.25 g Step A x : 0.25 g = 1000 mg : 1 g 0.25 x 1000 mg = x x 1 250 mg = x Step B 250 mg / 500 mg x 15 mL