Complete the following sentence using the options in the drop down selection. _ Is what the body does with the drug versus which is what the drug does to the body.

Affinity

Efficacy

Biotransformation

Pharmacokinetics

Pharmacodynamics

Answer and Explanation

Correct Answer : D,E

A) Affinity: Affinity refers to the strength of the interaction between a drug and its receptor. It does not describe the body's overall handling of the drug or the drug's effects on the body.

B) Efficacy: Efficacy describes the ability of a drug to produce a desired therapeutic effect. It pertains to the drug’s effectiveness once it interacts with its target but does not encompass the body's handling of the drug.

C) Biotransformation: Biotransformation is the process of drug metabolism, specifically how the body chemically alters a drug. While it is a part of pharmacokinetics, it does not cover the entire concept.

D) Pharmacokinetics: Pharmacokinetics is the term used to describe what the body does with the drug, including absorption, distribution, metabolism, and excretion. It encompasses the processes that determine the drug's concentration in the body over time.

E) Pharmacodynamics: Pharmacodynamics refers to what the drug does to the body, including the relationship between drug concentration and effect. It encompasses the mechanisms of action, including receptor interactions and therapeutic effects.

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Correct Answer is A

Explanation

A. The drug will be more effective when given in a nonenteral route:
Morphine has a high first-pass effect when taken orally, meaning that a significant amount of the drug is metabolized in the liver before it reaches systemic circulation. This reduces the amount of active drug available in the bloodstream. To avoid this extensive metabolism, morphine is often administered through nonenteral routes, such as intravenous or subcutaneous, where it bypasses the digestive system and liver first-pass metabolism, resulting in higher systemic bioavailability and effectiveness.

B. The drug will be most effective when given orally:
Due to the high first-pass effect of oral morphine, a significant portion of the drug is metabolized by the liver before it reaches systemic circulation. This means that oral morphine is often less effective compared to other routes of administration, such as intravenous, because the bioavailability of the drug is reduced.

C. The drug is excreted by the kidneys at a slower rate than most medications:
The high first-pass effect primarily affects the drug's absorption and systemic availability rather than its excretion rate. The rate at which a drug is excreted by the kidneys is generally unrelated to its first-pass effect. Morphine’s excretion is influenced by its metabolism and clearance, but not directly by the first-pass effect.

D. The kidney will metabolize some of the drug before it reaches the bloodstream:
The first-pass effect occurs primarily in the liver, not the kidneys. It involves the metabolism of the drug by the liver before it reaches systemic circulation. Therefore, this option incorrectly attributes the first-pass effect to kidney metabolism.

A. 2 mg B. 0.20 mg C. 0.2 mg D. 2.0 mg

Correct Answer is C

Explanation

A) 2 mg: This dosage is incorrect because it represents two milligrams, which is ten times the intended amount of two-tenths of a milligram (0.2 mg). The intended dosage is much smaller, so this option does not accurately represent the prescribed amount.

B) 0.20 mg: Although this representation is correct, the trailing zero is not necessary and can lead to potential confusion or errors. Standard practice often omits the trailing zero to simplify and clarify dosage instructions.

C) 0.2 mg: This is the most appropriate and clear way to write two-tenths of a milligram. It includes a leading zero before the decimal point, which is important for clarity and reducing the risk of misinterpretation. This format adheres to best practices in medication transcription.

D) 2.0 mg: This option is incorrect because it represents two milligrams, not two-tenths of a milligram. The decimal point and trailing zero do not change the fact that the dosage is significantly larger than what is intended.

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Complete the following sentence using the options in the drop down selection. _____ Is what the body does with the drug versus ____ which is what the drug does to the body.

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Naxlex Comprehensive Predictor Exams

A nurse reads in a drug information guide that PO morphine has a high first-pass effect. Which of the following would the nurse expect?

Correct Answer is A

Explanation

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Correct Answer is C

Explanation

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Complete the following sentence using the options in the drop down selection. _ Is what the body does with the drug versus which is what the drug does to the body.