Drug is absorbed rapidly in the following form
**Core Concept**
The question is testing the knowledge of drug absorption, specifically the role of ionization and lipid solubility in determining the rate of absorption. Ionization of a drug molecule in the gastrointestinal tract can significantly impede its absorption, while lipid solubility is crucial for crossing the intestinal epithelial cells.
**Why the Correct Answer is Right**
The correct answer is a non-ionized, lipid-soluble form of the drug, which allows it to cross the lipid bilayer of the intestinal epithelial cells more easily. This is in accordance with the lipid solubility theory of absorption, which states that non-ionized, lipid-soluble molecules are more readily absorbed.
**Why Each Wrong Option is Incorrect**
* **Option A:** Ionized forms of drugs are less likely to be absorbed, as they are unable to cross the lipid bilayer of the intestinal epithelial cells.
* **Option B:** Water-soluble drugs are more likely to be excreted in the urine rather than being absorbed in the gastrointestinal tract.
* **Option C:** A highly charged molecule is unlikely to be absorbed, as it would be too large to pass through the aqueous pores of the intestinal epithelial cells.
**Clinical Pearl / High-Yield Fact**
When developing new medications, it is essential to consider the ionization state and lipid solubility of the drug molecule, as these factors can significantly impact its absorption and efficacy.
**Correct Answer: C. Non-ionized, lipid-soluble form**