(2026) Q&A
1. Which of the following statements best describes pharmacokinetics?
A) The study of how drugs affect the body
B) The study of how the body absorbs, distributes, metabolizes, and excretes drugs
C) The study of how drugs interact with each other and with other substances
D) The study of how drugs are used to treat, prevent, or diagnose diseases
Correct Answer: B) The study of how the body absorbs, distributes, metabolizes, and
excretes drugs
Rationale: Pharmacokinetics describes "what the body does to the drug" and
includes the processes of absorption, distribution, metabolism, and excretion
(ADME). Pharmacodynamics is the study of how drugs affect the body, while
pharmacotherapeutics focuses on the therapeutic uses of drugs.
2. What is the primary difference between a drug's bioavailability and its
bioequivalence?
A) Bioavailability is the fraction of a drug that reaches the systemic circulation, while
bioequivalence is the similarity between two formulations of the same drug in terms
of bioavailability and pharmacological effects
B) Bioavailability is the extent to which a drug produces its intended effects, while
bioequivalence is the equivalence between two formulations in terms of safety and
efficacy
C) Bioavailability is the rate at which a drug is absorbed into the bloodstream, while
bioequivalence is the degree to which two formulations have the same
pharmacokinetic parameters
,D) Bioavailability is the concentration of a drug in the blood or tissues, while
bioequivalence is the interchangeability between two formulations in terms of
dosage
Correct Answer: A) Bioavailability is the fraction of a drug that reaches the systemic
circulation, while bioequivalence is the similarity between two formulations of the
same drug in terms of bioavailability and pharmacological effects
Rationale: Bioavailability is the fraction of an administered drug that reaches the
systemic circulation. Bioequivalence refers to the similarity between two formulations
of the same drug in terms of their bioavailability and pharmacological effects. Factors
such as absorption and first-pass metabolism affect bioavailability.
3. A type B adverse drug reaction (ADR) is one that is unrelated to the pharmacologic
action of the drug. These reactions should be reported to the FDA through which
program?
A) Vaccine Injury Program
B) NIH Clinical Trial Monitoring Program
C) MedWatch Program
D) Patient Injury Program
Correct Answer: C) MedWatch Program
Rationale: The FDA's MedWatch program is the voluntary reporting system for
healthcare professionals to report serious adverse events, product quality problems,
and medication errors. Type B ADRs are idiosyncratic and unpredictable reactions not
related to the drug's primary pharmacology.
, 4. Which of the following herbal supplements is known for its immunostimulant
properties and is commonly used for the common cold and upper respiratory
infections?
A) Echinacea
B) St. John's Wort
C) Kava Kava
D) Valerian
Correct Answer: A) Echinacea
Rationale: Echinacea is an herbal supplement known for its immunostimulant
properties. It stimulates phagocytosis, increases respiratory cellular activity, and
mobilizes leukocytes. It is commonly used for the common cold and upper
respiratory infections.
5. Examples of drug-disease interactions include the following EXCEPT:
A) Delayed gastric emptying observed with diabetic gastroparesis
B) Constipation associated with irritable bowel syndrome
C) Bowel edema and intestinal hypoperfusion from heart failure
D) Renal decline secondary to uncontrolled hypertension
Correct Answer: B) Constipation associated with irritable bowel syndrome
Rationale: Drug-disease interactions occur when a patient's disease state alters the
pharmacokinetics or pharmacodynamics of a drug. Constipation from IBS is a
symptom, not a physiological change that significantly impacts drug handling.
Delayed gastric emptying, bowel edema, and renal decline are physiological changes
that affect drug handling.