Free ExCPT Questions and Answers — Questions and Answers
Question 1: You get a prescription for 250 mg of amoxicillin for a 12-year-old child who weighs 88 pounds. Adults should take 500 mg daily. You draw the pharmacist's attention to the prescription because:
- the dosage is too high, according to the child’s weight
- the dosage is under therapeutic dosage
- It is not necessary to alert the pharmacist, the prescription is fine (Correct answer)
- the dosage is too high, according to Young’s Rule
Correct answer: It is not necessary to alert the pharmacist, the prescription is fine
The prescribed dosage of 250 mg of amoxicillin for a 12-year-old weighing 88 pounds is generally considered safe and appropriate. Pediatric dosages for amoxicillin typically range from 20-50 mg/kg/day, and for an 88-pound child (approx. 40 kg), this would be 800-2000 mg/day. A 250 mg dose falls well within this therapeutic range, especially if administered multiple times a day, and is lower than the typical adult dose of 500 mg.
Question 2: Keflin dosage for adults is 1 g. What dosage would be appropriate for a 50-pound child?
- 750 mg
- 170 mg
- 500 mg
- 333 mg (Correct answer)
Correct answer: 333 mg
To determine an appropriate pediatric dosage based on an adult dose, Clark's Rule is often used. This rule calculates the child's dose by dividing the child's weight in pounds by 150 pounds (average adult weight) and multiplying by the adult dose. For a 50-pound child and a 1000 mg (1 g) adult dose, the calculation is (50 lbs / 150 lbs) * 1000 mg, which equals approximately 333 mg.
Question 3: Ethambutol 10 mg/kg is the dosage you requested for a toddler who weighs 88 lb. 1 dosage =
- 400 mg (Correct answer)
- 880 mg
- 200 mg
- 800 mg
Correct answer: 400 mg
To calculate the correct dosage, first convert the child's weight from pounds to kilograms. Since 1 kilogram is approximately 2.2 pounds, an 88-pound toddler weighs 40 kg (88 lb / 2.2 lb/kg). Then, multiply the dosage per kilogram by the child's weight in kilograms: 10 mg/kg * 40 kg equals a 400 mg dosage.
Question 4: You have requested 150 mg of cyclosporine by po. You currently have a stock of a 100 mg/mL solution. Amount disbursed =
- 3 mL
- 1.5 mL (Correct answer)
- 0.75 mL
- 0.35 mL
Correct answer: 1.5 mL
To determine the amount to dispense, use the formula: (Desired Dose / Concentration of Stock Solution). You need 150 mg of cyclosporine, and your stock solution has a concentration of 100 mg per 1 mL. Therefore, dividing 150 mg by 100 mg/mL yields 1.5 mL.
Question 5: Sulfisoxazole susp. 300 mg po is what you've ordered. You currently store a 250 mg/5 mL solution. Amount disbursed =
- 1.2 mL
- 3 mL
- 5 mL
- 6 mL (Correct answer)
Correct answer: 6 mL
To calculate the volume of suspension needed, divide the desired dose by the concentration of the stock solution and then multiply by the volume associated with that concentration. You need 300 mg, and the stock is 250 mg in 5 mL. So, (300 mg / 250 mg) * 5 mL equals 1.2 * 5 mL, resulting in 6 mL to be dispensed.
Question 6: You are ordering 0.25 mg qid of digoxin elixir. You have 0.5 mg/10 mL of stock. Amount given for each dosage
- 0.5 mL
- 2 mL
- 5 mL (Correct answer)
- 10 mL
Correct answer: 5 mL
To find the volume for each dosage, divide the ordered dose by the concentration of the stock solution and multiply by the volume of the stock. The order is for 0.25 mg, and the stock is 0.5 mg in 10 mL. Therefore, (0.25 mg / 0.5 mg) * 10 mL equals 0.5 * 10 mL, which results in 5 mL for each dosage.
Question 7: You are given a Roxicet prescription. The prescription form has to include the following information.
- the name, strength, and form of the drug, written in ink (Correct answer)
- the address of the patient
- the age of the patient
- all of the above
Correct answer: the name, strength, and form of the drug, written in ink
A valid prescription form must include specific essential information to ensure proper medication dispensing and patient safety. This includes the full name of the drug, its strength (e.g., 5 mg), and the dosage form (e.g., tablet, capsule, solution), all clearly written. While patient address and age are often helpful or required by some regulations, the core drug details are universally mandatory.
Free ExCPT Questions and Answers
You get a prescription for 250 mg of amoxicillin for a 12-year-old child who weighs 88 pounds.
Adults should take 500 mg daily.
You draw the pharmacist's attention to the prescription because: