Before marketing a new drug that has been approved for use based on clinical effectiveness and safety, the manufacturer wishes to study the potential new uses for the drug. This is an example of which phase of study?
Phase I
Phase II
Phase III
Phase IV
The Correct Answer is D
a) Phase I studies focus on assessing the safety, dosing, and side effects of a drug in healthy volunteers, not its clinical effectiveness or potential new uses.
b) Phase II studies evaluate the drug's effectiveness and safety in a small group of patients with the targeted condition but do not focus on potential new uses.
c) Phase III studies are large-scale trials conducted to confirm the drug's effectiveness and safety before approval but do not typically involve studying new uses of the drug.
d) Phase IV studies occur after a drug has been approved and marketed. These studies, often called post-marketing surveillance, evaluate the drug's effectiveness and safety in the general population and investigate new potential uses or long-term effects.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Complete blood count (CBC) and serum glucose levels are important for overall health monitoring but do not specifically assess drug metabolism or excretion, which are key factors in drug toxicity.
B. Pancreatic enzymes and urinalysis are useful for detecting pancreatic disorders and infections but are not primary indicators of drug toxicity.
C. Serum creatinine and liver function tests (LFTs) are critical for monitoring drug toxicity, especially in older adults. The kidneys and liver are responsible for drug metabolism and excretion. Impaired kidney function, indicated by elevated serum creatinine, can lead to drug accumulation and toxicity. Abnormal LFTs suggest liver dysfunction, which can affect drug metabolism and increase toxicity risk.
D. Serum lipids and electrolytes are important for cardiovascular and metabolic health but do not directly assess drug metabolism or toxicity risk.
Correct Answer is C
Explanation
a) Complete blood counts (CBC) are useful for monitoring infection, anemia, or bone marrow suppression, but they are not the primary concern for azithromycin and acetaminophen toxicity.
b) Electrolytes are important for general health but are not directly related to the major side effects of these drugs.
c) Liver enzymes (AST, ALT) should be monitored because both azithromycin and acetaminophen can cause hepatotoxicity, especially at high doses. Acetaminophen overdose is a known cause of liver failure.
d) Urinalysis may be helpful in assessing kidney function, but it is not the primary focus when monitoring for drug-induced liver toxicity.
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