Statins are among the most widely prescribed medicines in the world, and for good reason: they lower LDL (“bad”) cholesterol and reduce the risk of heart attack and stroke. But if your doctor has suggested a statin, you may have questions about how they work, whether you really need one and what side effects to expect.
How statins work
Statins block an enzyme the liver uses to make cholesterol. As a result, the liver pulls more LDL cholesterol out of the blood. Statins may also help stabilize existing plaque in the arteries, making it less likely to break open and cause a heart attack or stroke.
Common statins include atorvastatin, rosuvastatin, simvastatin and pravastatin. They come in different strengths, and your doctor will choose one based on how much your LDL needs to come down.
Who may benefit from a statin?
According to Mayo Clinic, doctors consider your overall risk of heart attack and stroke, not just your cholesterol number. Statins are often recommended for people who:
- Already have heart disease, or have had a heart attack or stroke
- Have very high LDL cholesterol (190 mg/dL or higher)
- Have diabetes and are in a certain age range
- Have a high estimated 10-year risk of heart disease based on factors like age, blood pressure and smoking
Possible side effects
Most people take statins without problems. When side effects happen, they may include:
- Muscle aches. The most commonly reported side effect. Serious muscle damage is rare.
- Changes in liver enzymes, which your doctor may check with blood tests.
- A small increase in blood sugar, which may slightly raise the risk of developing type 2 diabetes in some people.
- Digestive issues such as nausea or constipation.
For most people at high risk, the heart and stroke benefits outweigh these risks. If you have side effects, talk with your doctor. Switching to a different statin or adjusting the dose often helps.
Important precautions
- Don’t stop on your own. Stopping suddenly can increase your risk. Talk with your doctor first.
- Grapefruit can interact with some statins. Ask your pharmacist whether this applies to yours.
- Pregnancy: statins are generally not recommended during pregnancy. Tell your doctor if you’re pregnant or planning to be.
- Tell your doctor about all medicines and supplements, since some can interact.
Lifestyle still matters
Statins work best alongside healthy habits. A heart-healthy diet, like the Mediterranean diet, more soluble fiber, regular exercise and not smoking all help lower your risk further.
What this means for you
If your doctor recommends a statin, ask what your estimated risk is, how much the medicine is expected to lower it and what side effects to watch for. Make a plan for follow-up blood tests to see how well it’s working.
The bottom line
Statins lower LDL cholesterol and reduce the risk of heart attack and stroke, especially for people at high risk. Most people tolerate them well, and a conversation with your doctor can help you decide whether one is right for you.
Common questions
How long will I need to take a statin?
For many people, statins are a long-term treatment, because cholesterol usually rises again if the medicine is stopped. Your doctor will review your treatment over time.
Can diet changes replace a statin?
Sometimes lifestyle changes are enough, especially when risk is moderate. For people at high risk, diet usually works alongside medicine rather than replacing it.
Do statins cause memory problems?
Some people have reported memory issues, but large studies haven’t shown that statins cause lasting memory problems. If you notice changes, talk with your doctor rather than stopping the medicine on your own.
This article is for general information and isn’t medical advice. Talk with your healthcare provider about your individual needs.
