Which of the following are used to treat hyperlipidemia?

Fibric acid derivatives, commonly referred to as fibrates, are a class of medications specifically designed to treat hyperlipidemia, particularly by lowering triglyceride levels and, to some extent, increasing HDL cholesterol levels. They work by activating peroxisome proliferator-activated receptors (PPARs), which play a crucial role in fatty acid metabolism. This mechanism enhances the breakdown of triglyceride-rich particles, ultimately reducing their concentration in the bloodstream.

In contrast, calcium channel blockers and angiotensin II receptor blockers are primarily used to manage hypertension and certain heart conditions rather than directly addressing lipid levels. Bile acid resins, while they do aid in lowering LDL cholesterol levels by preventing its reabsorption in the intestine, are distinct from fibrates in terms of their chemical structure and mechanism of action.

Thus, fibrates stand out as effective agents in the management of hyperlipidemia due to their specific action on triglycerides and overall lipid profile improvement.