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What's the mechanism of lipitor on hmg coa reductase?

See the DrugPatentWatch profile for lipitor

How does Lipitor work on HMG‑CoA reductase?

Lipitor (atorvastatin) is a statin that lowers cholesterol by inhibiting the enzyme HMG‑CoA reductase in the liver. HMG‑CoA reductase is the rate-limiting step in the mevalonate pathway, which cells use to synthesize cholesterol. By blocking this step, atorvastatin reduces hepatic cholesterol production and pushes liver cells to take up more cholesterol from the bloodstream via increased LDL receptor activity.

What does “inhibiting HMG‑CoA reductase” mean at the drug level?

Atorvastatin competitively inhibits HMG‑CoA reductase, interfering with the enzyme’s ability to convert HMG‑CoA to mevalonate—an early, key step required for cholesterol biosynthesis.

What happens in the body after HMG‑CoA reductase is blocked?

With less cholesterol made in liver cells, the liver increases the number of LDL receptors on hepatocytes, pulling more LDL (“bad cholesterol”) out of the blood. This mechanism is why atorvastatin primarily lowers LDL cholesterol, with additional effects that can include lowering triglycerides and raising HDL to a smaller degree.



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