Pravastatin is a cholesterol-lowering medication used to reduce the risk of heart attack, stroke, and death in people with high cholesterol or existing heart disease. It belongs to the statin class of drugs and works by blocking an enzyme in the liver that produces cholesterol. Sold under the brand name Pravachol, it’s available in 10 mg, 20 mg, 40 mg, and 80 mg tablets.
Lowering Cholesterol
Pravastatin’s primary job is reducing LDL cholesterol, commonly called “bad” cholesterol. It does this by blocking a specific enzyme the liver needs to manufacture cholesterol. When the liver can no longer produce as much cholesterol on its own, it compensates by pulling more LDL out of the bloodstream. The result is lower circulating cholesterol levels.
How much your LDL drops depends on the dose. At 10 mg, expect a 20 to 25 percent reduction. At 20 mg, that rises to 26 to 30 percent. The standard adult starting dose of 40 mg typically lowers LDL by 31 to 35 percent, and the maximum dose of 80 mg can bring it down 36 to 40 percent. These are moderate reductions compared to some newer, more potent statins, which is why pravastatin is often chosen when a patient needs a gentler option or has concerns about drug interactions.
Beyond LDL, pravastatin also lowers triglycerides and raises HDL (“good”) cholesterol. Maximum lipid reduction typically occurs within about two months of starting treatment.
Preventing Heart Attacks and Strokes
Cholesterol numbers matter because of what they predict: cardiovascular events. Pravastatin has been studied extensively for its ability to prevent heart attacks, strokes, and cardiovascular death, both in people who already have heart disease and in those who are at risk but haven’t had an event yet.
A pooled analysis of major pravastatin trials published in the journal Circulation found a 62 percent reduction in fatal or nonfatal heart attacks and a 62 percent reduction in fatal or nonfatal strokes among patients taking the drug. In people with existing coronary heart disease, pravastatin also slows the buildup of plaque in the arteries.
For people without diagnosed heart disease but with high cholesterol, pravastatin is approved to reduce the risk of a first heart attack, reduce the chance of needing procedures like bypass surgery or stenting, and lower cardiovascular death rates. For those who already have heart disease, it carries the additional indication of reducing overall mortality and stroke risk.
Who Takes Pravastatin
Most adults prescribed pravastatin fall into two groups: those with high cholesterol that hasn’t responded well enough to diet and exercise alone, and those whose doctors want to lower their cardiovascular risk regardless of where their numbers started. It’s always used alongside dietary changes, not as a replacement for them.
Pravastatin is also one of the few statins approved for children. Kids ages 8 to 13 with an inherited form of high cholesterol (called heterozygous familial hypercholesterolemia) can take 20 mg daily, while adolescents ages 14 to 18 can take up to 40 mg. These pediatric uses are reserved for cases where LDL remains very high despite dietary changes, particularly when there’s a family history of early heart disease.
Why Doctors Choose Pravastatin Over Other Statins
Pravastatin stands out from other statins in one important way: it is the only statin that does not get broken down by the liver’s main drug-processing system, known as the CYP450 enzyme pathway. Most other statins pass through this system, which is the same pathway that processes dozens of common medications. When two drugs compete for the same enzymes, blood levels of one or both can spike, raising the risk of side effects.
Because pravastatin skips this pathway, it has far fewer drug interactions than statins like simvastatin or atorvastatin. Heart rhythm medications like amiodarone and dronedarone, for instance, pose no significant interaction concern with pravastatin. Digoxin is also safe to combine with it. This makes pravastatin a practical choice for people who take multiple medications, particularly older adults.
That said, pravastatin isn’t interaction-free. The fibrate gemfibrozil roughly doubles pravastatin levels in the blood and should generally be avoided. Immunosuppressant drugs like cyclosporine can increase pravastatin exposure five to tenfold, so doses need to be kept low in transplant patients. The antibiotic clarithromycin also requires a dose cap of 40 mg.
Dosing and How to Take It
The recommended starting dose for adults is 40 mg once daily. If cholesterol levels don’t reach the target, the dose can be increased to 80 mg. Unlike some statins that work best when taken at bedtime (because the liver produces more cholesterol overnight), pravastatin can be taken at any time of day, with or without food.
People with severe kidney impairment typically start at a lower dose of 10 mg. Those taking cyclosporine start at 10 mg at bedtime and generally stay at or below 20 mg.
Common Side Effects
Pravastatin is generally well tolerated. The side effects people report most often are muscle aches, nausea, headache, and cold-like symptoms. Muscle pain is the side effect patients worry about most with any statin, and while it does occur, pravastatin’s water-soluble nature means it doesn’t penetrate muscle cells as easily as fat-soluble statins. This may translate to a somewhat lower risk of muscle-related complaints, though individual experiences vary.
Serious muscle damage, called rhabdomyolysis, is rare but possible, especially when pravastatin is combined with drugs that raise its blood levels (like cyclosporine or gemfibrozil). Signs to watch for include unusual muscle pain or weakness, particularly if accompanied by dark-colored urine. Liver enzyme elevations can also occur, which is why blood tests are sometimes checked after starting treatment.
Pregnancy and Pravastatin
Statins were historically listed as strictly off-limits during pregnancy. In 2021, the FDA reversed that position and removed the blanket contraindication for all statins during pregnancy. The agency determined that the automatic “never use” warning was too broad, particularly for high-risk patients like those with familial hypercholesterolemia or a history of stroke. This doesn’t mean pravastatin is routinely recommended in pregnancy, but the decision is now left to the patient and their doctor based on individual risk.