Nokea
What describes the action of a drug on the body?
- A. Pharmacodynamics
- B. Pharmacokinetics
- C. Microbiology
- D. Physiology
Correct Answer: A
Rationale: Pharmacodynamics studies the effects of a drug on the body, including mechanisms of action and therapeutic effects, unlike pharmacokinetics, which focuses on drug movement.
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Dulcea has type 2 diabetes and a high triglyceride level. She has gemfibrozil prescribed to treat her hypertriglyceridemia. A history of which of the following might contraindicate the use of this drug?
- A. Reactive airway disease/asthma
- B. Inflammatory bowel disease
- C. Allergy to aspirin
- D. Gallbladder disease
Correct Answer: D
Rationale: Gemfibrozil increases gallstone risk, contraindicating its use in gallbladder disease.
Which of the following anti inflammatory drugs is ineffective in gout?
- A. Piroxicam
- B. Tolmetin
- C. Aspirin
- D. Celecoxib
Correct Answer: C
Rationale: Aspirin increases uric acid levels, worsening gout.
All are explained on pharmacogenetic conditions except
- A. G6PD deficiency
- B. Warfarin insensitivity
- C. Adenosine deaminase deficiency
- D. Malignant hyperthermia
Correct Answer: C
Rationale: Adenosine deaminase deficiency is not typically pharmacogenetic; others are.
Grapefruit juice contains furanocoumarins that have been found to:
- A. Alter absorption of drugs through competition for binding sites
- B. Inhibit CYP 3A4, leading to decreased first-pass metabolism of drugs
- C. Alter vitamin K metabolism, leading to prolonged bleeding
- D. Enhance absorption of calcium and vitamin D
Correct Answer: B
Rationale: Furanocoumarins in grapefruit juice inhibit CYP3A4, reducing first-pass metabolism and increasing drug levels (e.g., statins).
In response to the patient's question about how to know whether drugs are safe, the nurse explains that all medications undergo rigorous scientific testing controlled by what organization?
- A. Food and Drug Administration (FDA)
- B. Drug Enforcement Agency (DEA)
- C. Centers for Disease Control and Prevention (CDC)
- D. Joint Commission on Accreditation of Healthcare Organizations (JCAHO)
Correct Answer: A
Rationale: The FDA is responsible for controlling and regulating the development and sale of drugs in the United States, allowing new drugs to enter the market only after being subjected to rigorous scientific testing. The DEA regulates and controls the use of controlled substances. The CDC monitors and responds to infectious diseases. The JCAHO is an accrediting body that inspects acute care facilities to ensure minimum standards are met.