Which of the following types of patients are more vulnerable to drug toxicity?
Immunocompromised patients
Immunocompetent patients
Infants and elderly patients
Patients who have allergic reactions
The Correct Answer is A
A. Immunocompromised patients:
Immunocompromised patients, whose immune systems are weakened or impaired, are indeed more vulnerable to drug toxicity. This vulnerability can be due to factors such as decreased ability to metabolize and eliminate drugs, increased susceptibility to infections and opportunistic pathogens, and impaired organ function, particularly in the liver and kidneys, which are involved in drug metabolism and excretion.
B. Immunocompetent patients:
Immunocompetent patients have normal immune function and are generally less vulnerable to drug toxicity compared to immunocompromised individuals. However, susceptibility to drug toxicity can still vary depending on factors such as age, underlying health conditions, renal and hepatic function, and concurrent use of other medications.
C. Infants and elderly patients:
Infants and elderly patients are more vulnerable to drug toxicity due to factors such as immature or declining organ function, altered drug metabolism and elimination, and differences in body composition. In infants, organ systems are still developing, while in elderly patients, age-related changes can affect drug pharmacokinetics and increase the risk of adverse reactions.
D. Patients who have allergic reactions:
Patients who have allergic reactions may experience adverse drug reactions if they are exposed to the offending medication again. However, this does not necessarily make them more vulnerable to drug toxicity in general. Allergic reactions are specific immune responses and differ from drug toxicity, which can occur due to various mechanisms unrelated to allergies.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Antagonistic reaction:
An antagonistic reaction refers to a response where one substance opposes the action of another substance. In the context of hypersensitivity reactions, this term does not accurately describe the immune system's response to an allergen. Hypersensitivity reactions involve an overreaction of the immune system to a harmless substance, rather than opposing actions between substances. Therefore, choice A is not the correct term to describe hypersensitivity reactions.
B. Drug idiosyncrasy:
Drug idiosyncrasy refers to an unusual or unexpected response to a medication that is not related to the known pharmacological properties of the drug or the patient's characteristics. While idiosyncratic drug reactions can sometimes involve immune-mediated mechanisms, they are not synonymous with hypersensitivity reactions. Hypersensitivity reactions specifically involve the immune system's exaggerated response to an allergen, which may or may not be a medication. Therefore, while drug idiosyncrasy may involve unpredictable reactions, it does not specifically address the immune-mediated nature of hypersensitivity reactions.
C. Synergistic reaction:
A synergistic reaction occurs when the combined effect of two substances is greater than the sum of their individual effects. In the context of hypersensitivity reactions, this term does not accurately describe the immune system's response to an allergen. Hypersensitivity reactions involve an exaggerated response of the immune system to an allergen, rather than a synergistic interaction between substances. Therefore, choice C is not the correct term to describe hypersensitivity reactions.
D. Allergic reaction:
An allergic reaction is the correct term to describe hypersensitivity reactions. Hypersensitivity reactions involve the immune system's exaggerated response to a harmless substance, known as an allergen. This response can manifest in various symptoms, ranging from mild to severe, depending on the individual's sensitivity and the nature of the allergen. Allergic reactions can affect different organ systems and can be triggered by a wide range of substances, including foods, medications, environmental allergens, and insect venom. Therefore, choice D accurately describes hypersensitivity reactions.
Correct Answer is B
Explanation
A. Penicillins:
Penicillins are a class of antibiotics commonly used to treat various bacterial infections. While they are generally well-tolerated and have a low incidence of adverse effects, they are not typically associated with cartilage toxicity or tendon rupture, including the Achilles tendon.
B. Fluoroquinolones:
Fluoroquinolones are broad-spectrum antibiotics known for their effectiveness against a wide range of bacteria. However, they are associated with several significant adverse effects, including cartilage toxicity and tendon rupture. These adverse effects, particularly tendon rupture, are most commonly observed in weight-bearing tendons such as the Achilles tendon. Fluoroquinolones should be used cautiously, especially in populations at higher risk for tendon injuries.
C. Aminoglycosides:
Aminoglycosides are another class of antibiotics used to treat severe bacterial infections. While they have their own set of potential adverse effects, such as nephrotoxicity and ototoxicity, they are not associated with cartilage toxicity or tendon rupture.
D. Sulfonamides:
Sulfonamides are antibiotics that inhibit bacterial growth by interfering with the synthesis of folate. While they can cause various adverse effects, including skin reactions and hematologic abnormalities, they are not associated with cartilage toxicity or tendon rupture.
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