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The nurse is checking the dosage of a drug ordered in mg/ kg. A client weighs 275lb. The client weighs kilograms.
- A. 100 kg
- B. 125 kg
- C. 150 kg
- D. 175 kg
Correct Answer: B
Rationale: Pounds must be converted to kilograms using the conversion factor of 2.2 lb in 1 kg. Therefore, 275 / 2.2 = 125.
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A client has been taking warfarin (Coumadin) 5 \mathrm{mg} daily. After a check of the client's INR, the physician wants to increase the client's dose to 7.5 \mathrm{mg} on Wednesdays and continue 5 \mathrm{mg} all the other days of the week. The client has warfarin 5 -mg tablets on hand. The nurse would instruct the client to take tablets on Wednesdays.
- A. 1 tablet
- B. 1.5 tablets
- C. 2 tablets
- D. 2.5 tablets
Correct Answer: B
Rationale: 7.5 mg / 5 mg = 1.5
"Dose desired / dose on hand = dose administered" is the formula for calculating the dose to be administered. Under under which of the following circumstances is this to be used?
- A. When the physician is not available to calculate the dosage
- B. When the dosage is written in the apothecary system
- C. When the dose desired and dose on hand are in the same system
- D. When the label of the drug is in the metric system
Correct Answer: C
Rationale: When the dose ordered by the physician (dose desire is written in the same system as the dose on the drug container (dose on han, the above formula is used for calculating the dose to be administered. When the physician is not available to calculate the dosage, the dosage is written in the apothecary system, and the label of the drug is in the metric system are circumstances in which it becomes necessary for the nurse to compute the drug dosage.
A nurse is checking the label of a drug. Which of the following would the nurse identify as an important item needed to administer a drug? Select all that apply.
- A. Monitoring parameters
- B. Side effects
- C. Dosage form
- D. Drug name
- E. Dosage strength
Correct Answer: C,D,E
Rationale: Although drug labels contain a great amount of information about the drug being given, three specific items are needed to administer a drug: the drug name, dosage form, and dosage strength.
A client weighs 56 kg. The client weighs pounds.
- A. 112.0 lb
- B. 123.2 lb
- C. 134.4 lb
- D. 145.6 lb
Correct Answer: B
Rationale: Kilograms must be converted to pounds using the conversion factor of 2.2 pounds in 1 kg. Therefore, 56 ? 2.2 = 123.2.
The health care provider orders chlorpromazine 25 mg IM. The drug is supplied as chlorpromazine 50 mg/mL in a 1-mL ampule. How much would the nurse administer?
- A. 0.25 mL
- B. 0.5 mL
- C. 0.75 mL
- D. 1.0 mL
Correct Answer: B
Rationale: The drug is supplied as 50 mg in 1 mL. Calculating the dosage using the formula D / H ? Q, the equation would read: 25 mg / 50 mg ? 1 mL = 0.5 mL.