The nurse has given 800mg of a medication that has an 8-hour half-life. How much of the medication will remain in the client's body 24 hours after administration if no additional medication is given?
50 mg
200 mg
100 mg
400 mg
The Correct Answer is C
A half-life is the time it takes for the concentration of a drug in the body to decrease by half. In this case, the medication has an 8-hour half-life, so after 8 hours, the concentration of the medication in the client's body would be reduced to 400mg (half of the initial dose of 800mg). After another 8 hours (16 hours total), the concentration would be reduced to 200mg. After another 8 hours (24 hours total), the concentration would be reduced to 100mg.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Alprazolam is a benzodiazepine that is commonly used to treat anxiety disorders and panic disorders ¹. It can also be used as a sleep aid due to its sedative effects ³.
Option A is not correct because paroxetine is an antidepressant and is not commonly used as a sleep aid.
Option B is not correct because buspirone is an anti-anxiety medication and is not commonly used as a sleep aid.
Option D is not correct because amitriptyline is an antidepressant and is not commonly used as a sleep aid.
Correct Answer is B
Explanation
The therapeutic range for valproic acid is 50-100 mcg/mL ¹. In this case, the client has a serum range for valproic acid of 130 mcg/mL, which is above the therapeutic range but below the toxic level of >100 mcg/mL ¹. The nurse would anticipate that the provider will increase the daily dose of valproic acid to bring the serum range within the therapeutic range.
Option A is incorrect because the serum range is above the therapeutic range and changes may be needed.
Option C is incorrect because changing the medication may not be necessary if adjusting the dose can bring the serum range within the therapeutic range.
Option D is incorrect because decreasing the dose would lower the serum range further below the therapeutic range.
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