Which of the following inhibits CYP-P450
**Core Concept**
The **cytochrome P450 (CYP450) enzyme system** plays a crucial role in the metabolism of various drugs. Inhibition of this system can lead to significant drug interactions. Understanding the factors that influence CYP450 activity is essential for predicting and managing potential interactions.
**Why the Correct Answer is Right**
Certain compounds can inhibit CYP450 enzymes, either by competing with the substrate for the active site or by forming a stable complex with the enzyme. This inhibition can decrease the metabolism of other drugs, potentially leading to increased drug concentrations and toxicity. Common inhibitors include certain antibiotics, antifungals, and anti-depressants.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not specifically inhibit CYP450.
**Option B:** Similarly, this option does not have a significant inhibitory effect on CYP450.
**Option C:** This option is also incorrect as it is not a known inhibitor of CYP450.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that **grapefruit juice** is a well-known inhibitor of the CYP3A4 isoform of CYP450, and its consumption can lead to significant drug interactions.
**Correct Answer:** D. Grapefruit juice inhibits CYP-P450