Nokea
A nurse is preparing to administer medications to a 4-month-old infant. Which of the following pharmacokinetic principles should the nurse consider when administering medications to this client?
- A. Infants have a more rapid gastric emptying time.
- B. Infants have normal liver function.
- C. Infants have a more rapid gastric emptying time.
- D. Infants have an increased ability to absorb topical medications.
Correct Answer: D
Rationale: Immature liver function affects metabolism, and increased topical absorption occurs due to thinner skin; rapid gastric emptying (A,C) is incorrect.
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Genetic polymorphisms account for differences in metabolism, including:
- A. Poor metabolizers, who lack a working enzyme
- B. Intermediate metabolizers, who have one working, wild-type allele and one mutant
- C. Extensive metabolizers, with two normally functioning alleles
- D. All of the above
Correct Answer: D
Rationale: All listed phenotypes (A-C) result from genetic polymorphisms affecting drug metabolism, making D correct.
Patients who are on long-term aspirin therapy should have ____ annually.
- A. Complete blood count
- B. Salicylate level
- C. Amylase
- D. Urine analysis
Correct Answer: A
Rationale: Annual CBC monitors for aspirin-related bleeding; salicylate isn't routine yearly.
Hepatitis B vaccine is contraindicated in patients who:
- A. Were born after less than 32 weeks gestation (give first dose at age 6 months)
- B. Are pregnant
- C. Are on hemodialysis
- D. Are allergic to yeast
Correct Answer: D
Rationale: Hepatitis B vaccine is contraindicated in yeast allergy (it's yeast-derived); prematurity , pregnancy , or dialysis are not.
A characteristic that distinguishes true receptors from other drug binding sites present in blood and other biological tissues is the characteristic of:
- A. binding affinity
- B. reversible binding
- C. signal transduction
- D. stereoselective interaction
Correct Answer: B
Rationale: Reversible binding is a key feature of true receptors, distinguishing them from non-specific binding sites like plasma proteins.
Which statement is not correct about metformin:
- A. Is for internal use only
- B. Reduce weight, apetite
- C. More frequently causes nausea and vomiting comparing with other hypoglicemic drugs
- D. Use for diabetes mellitus type I
Correct Answer: D
Rationale: Metformin is not typically used for type 1 diabetes, which requires insulin, as it acts on insulin sensitivity and hepatic glucose production.