**Question:** All of the given are active against hormone-dependent lipase, EXCEPT:

A. Orlistat
B. Fenofibrate
C. Clofibrate
D. Bromocriptine

**Core Concept:**

Hormone-dependent lipase refers to lipase enzymes that are regulated by hormones, particularly those involved in the breakdown of triglycerides in the digestive system. In this context, we are discussing drugs that act on these enzymes.

**Why the Correct Answer is Right:**

D. Bromocriptine is a dopamine agonist primarily used to treat hyperprolactinemia (elevated prolactin levels) and Parkinson's disease. It does not target hormone-dependent lipase directly, making it the correct option in this context.

**Why Each Wrong Option is Incorrect:**

A. Orlistat is a lipase inhibitor that blocks the action of pancreatic lipase, preventing the absorption of dietary fats in the small intestine. This option is incorrect because it does target hormone-dependent lipase.

B. Fenofibrate is a fibrate drug that inhibits acyl-CoA: cholesterol acyltransferase (ACAT), thereby decreasing cholesterol esterification and promoting cholesterol efflux from macrophages. This option is incorrect as it targets the enzyme ACAT rather than hormone-dependent lipase.

C. Clofibrate is a fibrate drug that also inhibits ACAT, which is involved in cholesterol esterification and triglyceride synthesis. This option is incorrect as it targets the same enzyme (ACAT) as fenofibrate, not hormone-dependent lipase.

**Clinical Pearl / High-Yield Fact:**

Highlighting the role of ACAT inhibitors (fibrates) in managing dyslipidemia by modulating cholesterol and triglyceride levels is crucial for understanding their mechanism of action and differentiating them from drugs targeting hormone-dependent lipase. Adequate knowledge of these drugs aids in clinical decision-making for treating lipid disorders and optimizing patient care.