All are true about HMG CoA reductase inhibitors except-
**Core Concept**
HMG CoA reductase inhibitors, also known as statins, are a class of lipid-lowering medications that work by inhibiting the enzyme HMG-CoA reductase. This enzyme plays a crucial role in the biosynthesis of cholesterol in the liver. Statins are commonly prescribed to patients with hypercholesterolemia to reduce their risk of cardiovascular disease.
**Why the Correct Answer is Right**
Statins work by competitively inhibiting HMG-CoA reductase, which leads to a decrease in the production of cholesterol in the liver. This results in an increase in the expression of LDL receptors on the surface of hepatocytes, allowing for increased uptake and clearance of LDL cholesterol from the bloodstream. This mechanism is well-established and is the basis for the use of statins in the management of hypercholesterolemia.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it is a true statement about statins. Statins do indeed inhibit HMG-CoA reductase, which is the primary mechanism by which they lower cholesterol levels.
**Option B:** This option is incorrect because it is a true statement about statins. Statins do indeed increase the expression of LDL receptors on the surface of hepatocytes, which allows for increased uptake and clearance of LDL cholesterol from the bloodstream.
**Option C:** This option is incorrect because it is a true statement about statins. Statins do indeed have pleiotropic effects, including anti-inflammatory and antioxidant properties, which contribute to their overall benefit in reducing cardiovascular risk.
**Clinical Pearl / High-Yield Fact**
It's essential to remember that statins are not just cholesterol-lowering medications but also have significant pleiotropic effects that contribute to their overall benefit in reducing cardiovascular risk.
**Correct Answer: A.**