A nurse is teaching a class about pharmacodynamics. The nurse should include that which of the following medication levels occurs when a medication is at the lowest serum concentration?
Half-life
Peak
Toxic
Trough
The Correct Answer is D
D) Trough:
The trough level of a medication is the lowest concentration of the drug in the bloodstream before the next dose is administered. Monitoring the trough level helps ensure that the medication stays within a therapeutic range, minimizing the risk of toxicity and ensuring effectiveness.
A) Half-life:
Half-life refers to the time it takes for the concentration of a drug in the blood to decrease by half. It is related to how long the drug stays in the system but does not specifically indicate the lowest concentration.
B) Peak:
The peak level is the highest concentration of the drug in the bloodstream after administration. It is used to assess the maximum effect of the drug, not the lowest concentration.
C) Toxic:
Toxic level refers to the concentration of a drug at which it can cause adverse effects or toxicity. It is not related to the lowest concentration but rather to potentially harmful levels.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["100"]
Explanation
Calculating the IV Infusion Rate
Problem: Administer 300 mg of clindamycin IV over 30 minutes. The available solution is 300 mg in 50 mL of 0.9% NaCl.
Steps:
Convert minutes to hours:
30 minutes x (1 hour / 60 minutes) = 0.5 hours
Calculate the infusion rate:
50 mL / 0.5 hours = 100 mL/hour
Answer: The nurse should set the IV pump to deliver 100 mL/hour.
Correct Answer is B
Explanation
A) "I've had a backache for several days."
A backache is not typically associated with digoxin toxicity. This symptom is more likely related to musculoskeletal issues rather than an adverse effect of digoxin.
B) "I feel nauseated and have no appetite."
Nausea and loss of appetite are common symptoms of digoxin toxicity. Digoxin can cause gastrointestinal disturbances as part of its adverse effects, and these symptoms are important indicators that the medication levels may be too high.
C) "I am urinating more frequently."
Increased urination is not an adverse effect of digoxin itself but may be a result of the diuretic effect of other medications often used in conjunction with digoxin for heart failure. It is not typically a direct sign of digoxin toxicity.
D) "I can walk a mile a day."
The ability to walk a mile a day indicates that the client is experiencing functional improvement, not adverse effects. Digoxin is used to improve symptoms of heart failure, and this statement suggests that the medication may be having a beneficial effect.
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