All of the following drugs are administered orally except :
**Core Concept**
Topical or local administration of certain medications bypasses first-pass metabolism, ensuring higher bioavailability and efficacy. However, some medications require systemic absorption and are thus administered orally or through parenteral routes to achieve therapeutic effects.
**Why the Correct Answer is Right**
The correct answer is likely to be a medication that is typically administered via a route other than oral, such as topical, inhaled, or parenteral. This could be due to various reasons, including poor oral bioavailability, potential toxicity, or the need for rapid systemic absorption.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it is often administered orally, such as in the case of many antibiotics, antihistamines, or analgesics.
**Option B:** This option is incorrect because it is commonly administered orally, either as a tablet or capsule, to provide systemic absorption and therapeutic effects.
**Option C:** This option is incorrect because it is typically administered orally, often in the form of a tablet or liquid, to provide systemic absorption and therapeutic effects.
**Clinical Pearl / High-Yield Fact**
One notable exception is insulin, which is administered subcutaneously due to its large molecular size and poor oral bioavailability. This highlights the importance of considering the pharmacokinetic properties of a medication when selecting an administration route.
**Correct Answer: D.**