Statins are a class of cholesterol-lowering drugs that includes seven individual medications available in the United States. They are among the most widely prescribed drugs in the world, used to reduce LDL (“bad”) cholesterol and lower the risk of heart attack and stroke. Each statin is sold under a brand name but also available as a lower-cost generic.
All Seven Statins by Name
The FDA has approved the following statins as single-ingredient medications:
- Atorvastatin (brand name Lipitor)
- Rosuvastatin (brand name Crestor)
- Simvastatin (brand name Zocor)
- Pravastatin (brand name Pravachol)
- Lovastatin (brand name Mevacor, or Altoprev for the extended-release version)
- Fluvastatin (brand name Lescol)
- Pitavastatin (brand name Livalo)
Several combination products also exist. Vytorin pairs simvastatin with ezetimibe (a different type of cholesterol-lowering drug), while Advicor and Simcor combine a statin with extended-release niacin.
Atorvastatin and rosuvastatin are by far the most commonly prescribed because they are the most potent options in the group.
How Statins Work
Your liver produces most of the cholesterol in your body. Statins block a specific enzyme the liver needs to manufacture cholesterol. When less cholesterol is being made, liver cells respond by pulling more LDL cholesterol out of the bloodstream to compensate. The net effect is a measurable drop in LDL levels, along with a smaller reduction in triglycerides.
Not All Statins Are Equally Strong
Doctors classify statin therapy into three intensity levels based on how much they lower LDL cholesterol. The intensity depends on both which statin you take and what dose you’re on.
- High-intensity: Lowers LDL by 50% or more. Only atorvastatin (40 to 80 mg) and rosuvastatin (20 to 40 mg) reach this level.
- Moderate-intensity: Lowers LDL by 30% to 49%. This includes most statins at their mid-range doses: atorvastatin 10 to 20 mg, rosuvastatin 5 to 10 mg, simvastatin 20 to 40 mg, pravastatin 40 to 80 mg, lovastatin 40 to 80 mg, pitavastatin 1 to 4 mg, and fluvastatin at higher doses.
- Low-intensity: Lowers LDL by less than 30%. This covers the lowest doses of fluvastatin, lovastatin, pravastatin, and simvastatin.
This intensity classification matters because guidelines recommend high-intensity therapy for people at the greatest cardiovascular risk, while moderate-intensity therapy is appropriate for many others. Your doctor picks both the statin and the dose based on how much LDL reduction you need.
Who Takes Statins
Statins are prescribed in two broad situations. For people who have already had a heart attack or stroke, statins help prevent a second event. For people who haven’t had one yet, statins can reduce the chance of a first event if their risk is high enough.
Current guidelines from the American Heart Association and American College of Cardiology identify several groups who benefit most from statin therapy:
- Anyone with very high LDL cholesterol (190 mg/dL or above), regardless of other risk factors. This often points to a genetic condition called familial hypercholesterolemia.
- Adults aged 40 to 75 with diabetes, who are typically started on moderate-intensity statin therapy because diabetes itself raises cardiovascular risk.
- Adults aged 40 to 75 with elevated cardiovascular risk, as estimated by a 10-year risk calculator that factors in age, blood pressure, cholesterol, smoking status, and other variables.
Several additional factors can tip the scale toward starting a statin in borderline cases: a family history of early heart disease, chronic inflammatory conditions like rheumatoid arthritis or lupus, South Asian ancestry, a history of preeclampsia, early menopause, chronic kidney disease, or metabolic syndrome. For adults under 40 or over 75, the decision is more individualized.
Common Side Effects
Muscle aches are the side effect people worry about most, and roughly 10% of statin users in everyday clinical practice stop taking their medication because of muscle-related complaints. However, the picture is more nuanced than that number suggests. In large randomized trials where some participants received a statin and others received a placebo, about 11.7% of people on statins reported muscle symptoms compared to 11.4% on placebo. That near-identical rate suggests that much of the muscle discomfort people attribute to statins has other causes, a phenomenon sometimes called the “nocebo effect,” where expecting side effects makes them more likely to be noticed.
That said, genuine statin-related muscle problems do occur in a small number of people. Severe muscle breakdown is extremely rare but is a reason to contact a doctor promptly if you develop unusual muscle pain, tenderness, or weakness, especially with dark urine.
Liver enzyme elevations show up in about 1% of patients on higher doses, though these are almost always asymptomatic and reverse when the dose is adjusted. Actual liver injury is extraordinarily rare, occurring in roughly 1 in 100,000 people.
Grapefruit and Drug Interactions
Some statins interact with grapefruit juice. Grapefruit contains compounds that block an enzyme in your small intestine responsible for breaking down certain medications. When that enzyme is blocked, more of the drug enters your bloodstream than intended, raising the risk of side effects like muscle and liver damage. Simvastatin and atorvastatin are the two statins most affected. Seville oranges (the kind used in marmalade), pomelos, and tangelos can have the same effect.
Pravastatin, rosuvastatin, and pitavastatin are processed through different pathways and are not significantly affected by grapefruit. If you regularly eat or drink grapefruit products, this distinction could matter when choosing a statin.
Statins can also interact with certain other medications, including some antibiotics, antifungals, and heart rhythm drugs that use the same metabolic pathway. Your pharmacist will typically flag these interactions when filling a prescription.
Choosing Between Statins
All seven statins lower LDL cholesterol through the same basic mechanism, but they differ in potency, interaction profiles, and how your body processes them. Someone who needs a large LDL reduction will likely be prescribed atorvastatin or rosuvastatin. Someone who experiences side effects on one statin can often switch to a different one, since tolerability varies between individual drugs. Pravastatin and pitavastatin tend to have fewer drug interactions because they are metabolized differently than the others.
Cost can also play a role. All seven statins are available as generics, making them relatively inexpensive, but prices still vary. Atorvastatin and simvastatin generics tend to be among the least expensive options.