Nokea
Amoxicillin 250 mg is ordered for a child. The pharmacy supplies the drug in a suspension form. The label reads 500 mg/5 mL. The nurse would administer
- A. 1.0 mL
- B. 2.5 mL
- C. 5.0 mL
- D. 7.5 mL
Correct Answer: B
Rationale: 500 mg / 5 mL = 250 mg / X mL
500 ? X = 1250
X = 2.5
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After teaching a group of nursing students about measurement systems, the instructor determines that the teaching was successful when the students identify which of the following as units of the metric system?
- A. Minims
- B. Grains
- C. Drams
- D. Grams
Correct Answer: D
Rationale: Grams are units of weight in the metric system. Minims are units of volume in the apothecary system. Grains and drams are units of weight in the apothecary system.
A client weighs 200 lb. The client is to receive 5 mg/kg per dose of a drug. The client will receive ?. mg of the drug in each dose.
- A. 400.0 mg
- B. 454.5 mg
- C. 500.0 mg
- D. 550.0 mg
Correct Answer: B
Rationale: First, the patient's weight must be converted to kilograms: 200 lb ? 1 kg / 2.2 lb = 90.9 kg. Then the dosage is calculated: 90.9 kg ? 5 mg/kg = 454.5 mg.
The physician writes an order for a client to receive 1 mg of vitamin B12 once every month. Vitamin B12 comes in a 1000 mcg/mL vial. The nurse would administer ?... to the client each month.
- A. 0.5 mL
- B. 1.0 mL
- C. 1.5 mL
- D. 2.0 mL
Correct Answer: B
Rationale: First, the nurse needs to convert the milligrams to micrograms. Therefore, 1 mg = 1000 mcg. Since there is 1000 mcg/mL, the nurse would give 1 mL.
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
A medication is ordered for a client. The dosage he is to receive is 100,000 units. The drug label reads 400,000 units/mL. When setting up the dosage calculation using dimensional analysis, the nurse identifies the unit of measure to be calculated as which of the following?
- A. Milliliters
- B. Units
- C. Milligrams
- D. Tablets
Correct Answer: A
Rationale: The order specifies the client is to receive 100,000 units, and the drug is supplied as 400,000 units/mL. Using dimensional analysis, the goal is to calculate the volume (mL) to administer, so the unit of measure to be calculated is milliliters.