Which of the following drugs should not be crushed before administration?

First-pass metabolism occurs in the liver after a drug has been absorbed into the bloodstream from the gastrointestinal tract. It can reduce the bioavailability of a drug by metabolizing it before it reaches systemic circulation. First-pass metabolism does not occur with intravenous drug administration because drugs are injected directly into the bloodstream, bypassing the liver. Sublingual drug administration can also bypass first-pass metabolism because drugs are absorbed directly into the bloodstream through the mucous membranes under the tongue.

a. This statement is true, but it is not the best answer because it does not fully explain how first-pass metabolism can be bypassed.

b. This statement is false because first-pass metabolism can reduce, not increase, the bioavailability of a drug.

c. This statement is false because first-pass metabolism does not occur with intravenous drug administration.

Answer: A. Enteric-coated tablets

Rationale:

A) Enteric-coated tablets: Enteric-coated tablets should not be crushed as they are designed to dissolve in the intestines rather than the stomach. Crushing these tablets can destroy the coating, leading to stomach irritation or reducing the drug's effectiveness by releasing it prematurely.

B) Immediate-release tablets: Immediate-release tablets are generally safe to crush as they are designed to dissolve quickly and release their medication immediately. However, it is essential to confirm with each medication as some exceptions exist.

C) Chewable tablets: Chewable tablets are meant to be chewed for quicker absorption, especially for individuals with difficulty swallowing. Crushing is unnecessary and does not alter the intended function of these tablets.

D) Sublingual tablets: Sublingual tablets are designed for absorption under the tongue to bypass the digestive system and enter the bloodstream directly. Crushing sublingual tablets may impair their efficacy as the medication would not be absorbed as intended.