Pharmacology Dosage Calculations and Medication Orders Quiz

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17 Questions

What is the weight of a patient who is 132 lb in kilograms?

60 kg

If a patient's weight is 31 lb, how many milligrams of Cefaclor should they receive per day?

260 mg

What is the total daily dose of mephenytoin for a patient with a body surface area of 0.8 m²?

160 mg

For a patient who is 68 inches tall and weighs 172 lb, what is the Melphalan dosage per dose if it is given every 2 weeks?

160 mg

In the formula 'mg x kg = pts dose', what does 'pts' stand for?


What is the essential part of a medication order that must be included?

Name of drug to be administered

If a client needs to receive 80 mg of a drug, and the available tablets are 40 mg each, how many tablets should the client take?

2 tablets

To convert 2.5 kg to pounds, one would multiply by what factor?


Which abbreviation represents 'hour of sleep' in medication orders?


How many milliliters are in 1 liter?

1000 mL

If a child weighs 33 pounds, approximately how many kilograms does this weight correspond to?

22 kg

What is the correct conversion factor between milligrams (mg) and grams (g)?

1000 mg = 1 g

In the given calculations, what is the third numerator after 250 mg and 1000 mg?

0.5 g

What is the most accurate way to determine drug dose for infants, children, and older adults?

By calculating body surface area (m2)

Which equation is used to calculate the patient's dose per day based on body weight?

Drug Dose x square meters

What is the final answer for the given example involving cyclophosphamide dosing?

3.7 mL per dose

For oral medication, if 1 tablet equals 325 mg, what is the correct conversion factor from milligrams to grams for this scenario?

500 mg = 1 g

Study Notes

Dosage Calculations

  • Fluorouracil dosage calculation: 12mg/kg/day, not to exceed 800mg/day; for a 132lb patient, the dose would be 720mg
  • Cefaclor dosage calculation: 20mg/kg/day in 3 divided doses; for a 31lb patient, the dose would be 280mg, divided into 3 doses of 93mg each
  • Mephenytoin dosage calculation: 200mg/m² PO in 3 divided doses; for a 42-inch tall, 44lb patient, the dose would be 160mg, divided into 3 doses of 53mg each

Pharmacology and Medication Orders

  • Types of medication orders: stat, single, and standing orders
  • Essential parts of a medication order: full name of client, date and time order is written, name of drug to be administered, dosage of drug, frequency of administration, route of administration, and signature of person writing the order
  • Communicating medication orders: written chart, phone, or verbally; copied to Kardex or MAR, or on computer printout

Systems of Measurement and Conversion

  • Gram (weight): 1kg = 2.2lbs
  • Liter (volume): 1L = 1000mL
  • Meter (length): 1m = 100cm = 1000mm
  • Conversions: lb → kg, kg → lb, mL → L, L → mL

Body Surface Area (BSA) and Body Weight

  • BSA calculation: most accurate way for infants, children, older adults, and patients on antineoplastic agents or with low body weight
  • Determining drug dose per body weight: convert lbs to kg, determine drug dose per BW by multiplying drug dose x # of square meters

Test your knowledge on dosage calculations and different types of medication orders including stat orders, single orders, standing orders, and PRN orders. Learn about essential parts of a medication order such as full client name, date, time, and medication details.

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