Select the correct order in which pharmacokinetics process occur when a medication is taken via the oral route.

Distribution, Excretion, Absorption Metabolism

Absorption, Excretion, Metabolism, Distribution

Absorption, Distribution, Metabolism. Excretion

Absorption, Metabolism, Distribution, Excretion

Answer and Explanation

The Correct Answer is C

A) Distribution, Excretion, Absorption, Metabolism: This order is incorrect because absorption should occur before distribution. The medication must first be absorbed into the bloodstream before it can be distributed throughout the body. Excretion and metabolism follow after distribution, not before.

B) Absorption, Excretion, Metabolism, Distribution: This sequence is incorrect because distribution occurs after absorption and before metabolism. Excretion is the final step and occurs after metabolism.

C) Absorption, Distribution, Metabolism, Excretion: This is the correct order. After oral administration, the medication is first absorbed into the bloodstream from the gastrointestinal tract. It is then distributed throughout the body. Following distribution, the medication undergoes metabolism (primarily in the liver) to be converted into more water-soluble forms for elimination. Finally, the medication is excreted from the body, typically through the kidneys

D) Absorption, Metabolism, Distribution, Excretion: This order is incorrect because metabolism occurs after distribution, not before. After absorption, the drug must be distributed to various tissues before it is metabolized. Excretion is the final step following metabolism.

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Correct Answer is ["A","F"]

Explanation

A. St. John's wort 450 mg by mouth twice daily: St. John's wort is known to be a potent inducer of cytochrome P450 enzymes and can significantly reduce the effectiveness of warfarin by increasing its metabolism. This interaction can lead to subtherapeutic levels of warfarin and an increased risk of thromboembolic events.

B. Gabapentin 400 mg by mouth twice daily: While gabapentin can interact with other medications, its interactions with warfarin or St. John's wort are generally not as significant as those between warfarin and St. John's wort.

C. Aspirin 81 mg by mouth daily: Aspirin has anticoagulant properties and can have interactions with warfarin. However, the interaction with St. John's wort is less pronounced compared to the interaction between warfarin and St. John's wort.

D. Atorvastatin 80 mg by mouth daily: Atorvastatin primarily affects lipid levels and has different metabolic pathways compared to warfarin. It does not have a strong interaction with St. John's wort.

E. Lisinopril 5 mg by mouth daily: Lisinopril is an ACE inhibitor and does not have significant interactions with St. John's wort or warfarin.

F. Warfarin 5 mg by mouth daily. Warfarin is an anticoagulant that requires careful monitoring due to its interactions with various substances that can either increase the risk of bleeding or decrease its effectiveness.

G. Ginger 5 mg by mouth daily: Ginger can affect platelet function but is not as significant in interaction with warfarin as St. John's wort.

H. Valerian 10 mg by mouth daily: Valerian may have mild interactions with central nervous system depressants but does not have significant interactions with warfarin or St. John's wort.

A. Wait for at least another 30 minutes before calling to have the level drawn. B. Schedule the level to be drawn in 8 hours C. Call the lab to have the medication level drawn immediately D. Arrange for the level to be drawn tomorrow since the peak time has passed.

Correct Answer is A

Explanation

A. Wait for at least another 30 minutes before calling to have the level drawn:
For oral medications, peak drug levels are typically drawn 1 to 2 hours after administration, depending on the medication's pharmacokinetics. Since the client took the medication only 30 minutes ago, it is premature to draw the level now. Waiting an additional 30 minutes would align with the typical peak times for oral medications, ensuring that the drug level reflects its peak concentration.

B. Schedule the level to be drawn in 8 hours:
Drawing the peak level 8 hours after administration would likely be too late, as most oral medications reach their peak concentration within 1 to 2 hours. Scheduling the level for 8 hours later may result in an inaccurate measurement of the peak drug level, leading to potentially misleading clinical information.

C. Call the lab to have the medication level drawn immediately:
Drawing the level immediately after 30 minutes may not provide an accurate representation of the peak drug level. Oral medications generally reach peak levels later, and an early draw could result in a falsely low measurement that does not reflect the drug's maximum concentration.

D. Arrange for the level to be drawn tomorrow since the peak time has passed:
The peak time has not passed, as the medication was only administered 30 minutes ago. Drawing the level tomorrow would be far too late to assess the peak concentration accurately, which is essential for evaluating the effectiveness and safety of the medication.

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Select the correct order in which pharmacokinetics process occur when a medication is taken via the oral route.

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Naxlex Comprehensive Predictor Exams

Correct Answer is ["A","F"]

Explanation

The nurse is caring for a client who needs to have a peak drug level drawn. The client was given an oral medication 30 minutes ago. What is the best action by the nurse?

Correct Answer is A

Explanation

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