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 A
Explanation
The nurse would expect the provider to order acetaminophen or ibuprofen for the client. Headache, fever, chills, and muscle aches are common side effects of interferon beta-1a ¹⁴. These side effects are often referred to as flu-like symptoms and can be managed with over-the-counter pain relievers such as acetaminophen or ibuprofen ¹.
Option B is incorrect because an evaluation by a physician may not be necessary if the client is experiencing common side effects of interferon beta-1a.
Option C is incorrect because discontinuing the medication immediately may not be necessary if the client is experiencing common side effects of interferon beta-1a.
Option D is incorrect because checking the hemoglobin may not be necessary if the client is experiencing common side effects of interferon beta-1a.
Correct Answer is B
Explanation
An agonist is a molecule that can bind to and activate a receptor to induce a biological response ³. Agonists can be endogenous molecules, such as hormones or neurotransmitters, or medications that mimic the action of endogenous agonists ³.
Option A is incorrect because an agonist does not prevent receptor activation by other medications.
Option C is incorrect because an agonist does not increase the affinity of a receptor for a different medication.
Option D is incorrect because an agonist does not both block and activate a receptor.
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