How Lipitor Lowers Cholesterol
Lipitor (atorvastatin) is a statin drug that blocks an enzyme called HMG-CoA reductase in the liver. This enzyme drives cholesterol production, mainly LDL ("bad") cholesterol. By inhibiting it, Lipitor cuts LDL synthesis by 20-60%, depending on dose.[1]
The liver responds by pulling more LDL from the blood via increased LDL receptors on cell surfaces, clearing it faster. This drops blood LDL levels, reducing plaque buildup in arteries.[2]
Effects on Other Lipids
Lipitor also raises HDL ("good") cholesterol by 5-15% and lowers triglycerides by 20-40%, improving overall lipid profiles.[1][3]
| Cholesterol Type | Typical Change on Lipitor (10-80mg daily) |
|------------------|-------------------------------------------|
| LDL | ↓ 39-60% |
| HDL | ↑ 5-9% |
| Total | ↓ 25-45% |
| Triglycerides | ↓ 19-37% |[1]
How Quickly It Works
LDL drops within 2 weeks, peaking at 4-6 weeks. Full benefits appear after 4 weeks on stable dose.[2]
Why It Reduces Heart Risk
Lower LDL slows atherosclerosis, cutting heart attack and stroke risk by 20-40% in high-risk patients, per trials like ASCOT.[3]
[1]: FDA Lipitor Label
[2]: NEJM: Atorvastatin Review
[3]: Lancet: ASCOT-LLA Trial