Q: Which equation would you use to estimate a patient's creatinine clearance (CrCl) for drug dosing adjustments?

$$CrCl = \frac{(140 - age) \times weight\ (kg)}{72 \times serum\ creatinine\ (mg/dL)}$$

Question 1

Which of the following best describes the principle of 'monotherapy' in pharmacotherapy?

Accepted Answer

Using a single drug when it is sufficient to treat the patient's condition.

Question 2

A patient is prescribed both omeprazole and famotidine for acid suppression. According to the guiding principles of pharmacotherapy, what is the most appropriate action?

Accepted Answer

Discontinue one medication and use monotherapy unless there is a specific indication for both.

Question 3

Which of the following is NOT a category of drug therapy problem?

Accepted Answer

Drug is too expensive

Question 4

A patient with hypertension states, 'I don't feel sick, so I don't need to take my pills.' Which drug therapy problem does this scenario best illustrate?

Accepted Answer

Non-adherence

Question 5

According to the guiding principles, when should newly approved medications be used?

Accepted Answer

Only if there are clear advantages over older medications.

Question 6

A patient is prescribed amoxicillin but has a documented allergy to penicillin. What drug therapy problem is present?

Accepted Answer

Adverse drug reaction risk

Question 7

Which equation would you use to estimate a patient's creatinine clearance (CrCl) for drug dosing adjustments?

Accepted Answer

$$CrCl = \frac{(140 - age) 	imes weight\ (kg)}{72 	imes serum\ creatinine\ (mg/dL)}$$

Question 8

A patient is taking acetaminophen 500 mg, 2 tablets every 6 hours as needed for pain. What is the maximum daily dose of acetaminophen that should not be exceeded?

Accepted Answer

$$4000\ mg$$

Question 9

Which principle emphasizes the importance of using the lowest effective dose for the shortest duration?

Accepted Answer

Use the lowest dose and shortest duration likely to achieve the desired outcome.

Question 10

A patient is prescribed levofloxacin 750 mg once daily for pneumonia. Her creatinine clearance is 60 mL/min. Is this dose appropriate according to clinical guidelines?

Accepted Answer

Yes, 750 mg once daily is appropriate for CrCl \u003e 50 mL/min.

Question 11

Which of the following is an example of a 'prescribing cascade'?

Accepted Answer

Treating a drug-induced side effect as a new disease with another medication.

Question 12

A patient is prescribed a medication by injection, but oral administration would be equally effective and safe. What principle is being violated?

Accepted Answer

Avoid unnecessary invasive administration when oral is effective and safe.

Question 13

Which of the following is a key component of documenting a drug therapy problem?

Accepted Answer

Patient's medical condition, drug therapy involved, and the association between them.

Question 14

A patient is taking ciprofloxacin with dairy products, which decreases its absorption. What principle does this scenario illustrate?

Accepted Answer

Timing and interactions of drug administration can affect efficacy.

Question 15

Which of the following is an example of a lifestyle modification that may obviate the need for drug therapy?

Accepted Answer

Dietary changes to lower cholesterol.

Question 16

A patient is prescribed two different acetaminophen-containing products for pain. What drug therapy problem is most likely present?

Accepted Answer

Duplicate therapy leading to risk of overdose.

Question 17

Which of the following factors should be considered when prioritizing drug therapy problems?

Accepted Answer

Extent of potential harm, patient's perception, and rate at which harm is likely to occur.

Question 18

A patient forgets to take their medication several times a week. Which drug therapy problem does this represent?

Accepted Answer

Non-adherence

Question 19

Which of the following is a reason for failure of medication regimens?

Accepted Answer

Inappropriate drug selection, poor adherence, and drug interactions.

Question 20

According to the Pharmacists’ Patient Care Process (PPCP), which step involves monitoring and evaluating the patient’s response to therapy?

Accepted Answer

Follow Up: Monitor and Evaluate

Guiding Principles of Pharmacotherapy & Drug-Related Problems

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