Classification of Drugs Nursing

Classification of Drugs Nursing Related

Review Classification of Drugs Nursing related questions and content

What concept is considered when generic drugs are substituted for brand name drugs?

  • A. Bioavailability
  • B. Critical concentration
  • C. Distribution
  • D. Half-life
Correct Answer: A

Rationale: Bioavailability is the portion of a dose of a drug that reaches the systemic circulation and is available to act on body cells. Binders used in a generic drug may not be the same as those used in the brand name drug. Therefore, the way the body breaks down and uses the drug may differ, which may eliminate a generic drug substitution. Critical concentration is the amount of a drug that is needed to cause a therapeutic effect and should not differ between generic and brand name medications. Distribution is the phase of pharmacokinetics, which involves the movement of a drug to the body's tissues and is the same in generic and brand name drugs. A drug's half-life is the time it takes for the amount of drug to decrease to half the peak level, which should not change when substituting a generic medication.

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Drug which interferes with metabolism of theophylline is:

  • A. Erythromycin
  • B. Gentamicin
  • C. Penicillin
  • D. Furazolidone
Correct Answer: A

Rationale: Erythromycin inhibits P-450, increasing theophylline levels.

The patient is prescribed a medication that was just placed in Phase IV study. The patient tells the nurse, This medication is too expensive. Could the doctor order a generic form of this medication? What is the nurse's most accurate response?

  • A. Medications are not produced in generic form until the patent expires, which normally takes several years.
  • B. You can request the generic form but the binder used may make the drug less effective for this medication.
  • C. The generic form of the medication would not be any less expensive because this is a relatively new medication.
  • D. Generic medications are lower quality drugs and that would mean you would not be getting the best treatment available.
Correct Answer: A

Rationale: When a new drug enters the market, it is given a time-limited patent; generic forms of the medication cannot be produced until the patent expires. Because no generic version of this drug will exist because it is so new, it is impossible to predict what binder will be used or what the cost would be.

Select a suitable therapeutic indication for bethanechol:

  • A. To decrease the heart rate
  • B. To decrease the blood pressure
  • C. For urinary retention
  • D. Decrease intraocular pressure
Correct Answer: C

Rationale: Bethanechol, a muscarinic agonist, stimulates bladder contraction for urinary retention.

A patient who has chronic liver disease reports contact with a person who has tuberculosis (TB). The nurse will counsel this patient to contact the provider to discuss

  • A. a chest x-ray
  • B. a TB skin test
  • C. liver function tests (LFTs)
  • D. prophylactic antitubercular drugs
Correct Answer: B

Rationale: TB exposure requires a skin test first; chest x-ray follows if positive, and LFTs or prophylaxis aren't initial steps. Patients who have exposure to TB should have a TB skin test.

Which aminoglycoside is most commonly used in the treatment of cystic fibrosis patients infected with Pseudomonas aeruginosa?

  • A. Amikacin
  • B. Streptomycin
  • C. Tobramycin
  • D. Gentamicin
Correct Answer: C

Rationale: Tobramycin is frequently used in cystic fibrosis patients for its efficacy against Pseudomonas aeruginosa, often administered via inhalation or IV.

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