Statins Explained

Statins Explained: What You Should Know About Your Heart Health
If your doctor has recommended a statin, you might have questions—or even concerns. You're not alone. Statins are among the most widely prescribed medications in the world, yet they're also among the most misunderstood. This guide will help you understand what statins do, why they're prescribed, and what the science really says about their benefits and risks.
What Are Statins?
Statins are medications that lower your "bad cholesterol," also known as LDL cholesterol. Think of LDL cholesterol as sticky particles that can build up inside your arteries over time, forming plaques that narrow the passageways where blood flows. This buildup increases your risk of heart attack and stroke.
How Statins Work
Statins block an enzyme in your liver that produces cholesterol. By lowering LDL, they help prevent new plaque from forming and may even stabilise existing plaques—making them less likely to rupture and cause a heart attack or stroke.
The Bigger Picture
The goal isn't just about the numbers on your lab report. It's about protecting your heart and brain for the long term. Statins are a tool for sustained cardiovascular protection, especially for people at elevated risk.
Why Are Statins Prescribed?
Your doctor considers many factors when recommending a statin—not just your cholesterol level. In Australia, the Australian CVD Risk Calculator is used to assess your overall cardiovascular risk over the next five years, taking into account age, blood pressure, smoking status, family history, and more.
1
Previous Heart Attack or Stroke
Secondary prevention for those with established cardiovascular disease.
2
Diagnosed Heart Disease
Including coronary artery disease or other cardiovascular conditions.
3
Diabetes from Age 35
Diabetes significantly elevates cardiovascular risk, warranting statin therapy.
4
Very High LDL Cholesterol
LDL above 4.9 mmol/L indicates a high-risk profile requiring intervention.
5
High CVD Risk Score
A risk of ≥10% over five years, or 5–10% with additional risk factors.
6
First Nations Australians
Risk assessment is recommended from age 30, recognising the higher burden of cardiovascular disease in this population.
The key idea is prevention (i.e. stopping problems before they happen). Sometimes people with "borderline" cholesterol numbers still benefit from a statin because their overall risk is elevated.
What Are the Benefits?
The evidence for statins is strong. Large studies involving hundreds of thousands of people consistently show that statins provide meaningful, measurable protection against life-threatening cardiovascular events. These benefits build over time and are most pronounced when statins are taken consistently over many years.
33%
Fewer Heart Attacks
Statins reduce the risk of heart attacks by approximately one third.
22%
Fewer Strokes
A significant reduction in stroke risk across all risk groups studied.
8%
Lower All-Cause Mortality
Overall deaths from any cause are reduced in people taking statins.
1–2
Events Prevented per 100
Out of 100 moderate-to-high risk people treated for 5 years, 1–2 heart attacks or strokes are prevented.
The benefits are greatest for people at higher risk—those who've already had a heart attack, have diabetes, or have multiple risk factors. But even in people at moderate risk, statins provide meaningful, long-term protection for your heart and blood vessels.
What About Side Effects?
This is often the biggest concern people have, and it's important to separate fact from fiction. Understanding the true picture—based on clinical evidence rather than anecdote—can help you make a more confident decision.
Muscle Aches — Less Common Than You Think
About 5–10% of people report muscle symptoms in everyday practice. However, in blinded studies where neither patients nor doctors know who's taking a statin or placebo, muscle symptoms occur at nearly the same rate in both groups. Carefully controlled research suggests statins cause genuine muscle symptoms in at most 1% of people. This is partly due to the "nocebo effect"—the expectation of a side effect can make it more likely to occur.
Serious Muscle Injury (Rhabdomyolysis)
This severe complication is extremely rare, occurring in fewer than 1 in 10,000 people per year. Your doctor will monitor for warning signs and act promptly if needed.
Liver Problems
Serious liver injury is very rare, occurring in approximately 1 in 1,000 people. Routine liver function monitoring is not recommended for most people on statins, as significant liver damage is uncommon.
Diabetes Risk
Statins slightly increase the risk of developing diabetes—approximately 2 extra cases per 1,000 people treated per year. This risk is higher if you already have prediabetes. Importantly, even in people who develop diabetes, the cardiovascular benefits of statins far outweigh this risk.
In blinded studies, the same percentage of people stop their medication due to side effects in both the statin and placebo groups (around 8%). Most people tolerate statins very well.
The Nocebo Effect: When Expectation Becomes Symptom
What the Research Shows
Studies show that more than 90% of muscle symptoms reported by people on statins are not due to the medication itself. When people don't know whether they're taking a statin or a sugar pill, side effect rates are virtually identical in both groups.
This phenomenon—where expecting a side effect makes you more likely to experience it—is called the nocebo effect. It's well-documented in medical research and particularly relevant to statins, given the widespread (and often inaccurate) concern about their tolerability.
What This Means for You
This doesn't mean your symptoms aren't real—they absolutely are. It means the statin may not be the cause. Muscle aches are very common in the general population and become more frequent with age, exercise, and other health conditions.
Before attributing symptoms to your statin, it's worth discussing with your doctor to explore whether other factors might be contributing. Switching to a different statin or adjusting the dose often resolves symptoms effectively.
Are Statins Safe Long-Term?
Yes. Statins have been used for over 30 years, and millions of people worldwide have taken them safely for decades. Long-term studies consistently confirm that statins remain both safe and effective even after many years of use.
Memory & Cognitive Health
Multiple large studies show that statins do not cause memory problems or cognitive decline. In fact, some research suggests they may even help protect brain health by reducing cerebrovascular disease.
Cancer Risk
There is no evidence that statins increase cancer risk. Decades of data from large clinical trials and real-world populations confirm no association with any cancer type.
Other Concerns
Statins do not cause clinically significant kidney problems, cataracts, erectile dysfunction, or peripheral neuropathy. These associations have been investigated and not confirmed in rigorous studies.
The established benefits of statins in preventing heart attacks and strokes far outweigh the small risks of side effects. Over 30 years of research involving hundreds of thousands of people confirms their long-term safety profile.
What If I Don't Want to Take a Statin?
It's important to have an honest conversation with your doctor about your concerns. In some cases—particularly if your risk is lower—lifestyle changes alone may be appropriate. These form the foundation of cardiovascular health for everyone, regardless of whether they take medication.
Lifestyle Changes That Help
Eating a heart-healthy diet rich in vegetables, fruits, whole grains, and healthy fats
Regular physical activity—at least 150 minutes per week of moderate exercise
Maintaining a healthy weight and managing stress effectively
Quitting smoking—one of the most powerful steps you can take for heart health
Realistic Expectations
Lifestyle changes are essential and beneficial for everyone—but it's important to be realistic about their limits.
Lifestyle changes typically lower cholesterol by 10–15%.
Statins lower cholesterol by 30–55%.
For many people at higher risk, lifestyle changes alone aren't enough to adequately reduce cardiovascular risk.
Alternative Medications
If you truly cannot tolerate a statin, your doctor has other options available. These alternatives vary in potency and mechanism, and your doctor can help determine which is most appropriate for your situation.
Ezetimibe
Lowers cholesterol by approximately 18%. Well-tolerated, often used in combination with low-dose statins.
Bempedoic Acid
A newer option that lowers cholesterol by approximately 20% and has been shown to reduce heart attacks in people who cannot take statins.
PCSK9 Inhibitors
Powerful injectable medications lowering cholesterol by 45–60%. Evolocumab (Repatha) is PBS-subsidised in Australia for familial hypercholesterolaemia when other treatments are insufficient.
Bile Acid Sequestrants
Older medications that can lower cholesterol effectively, though they commonly cause digestive side effects and are less frequently used today.
What If I Get Side Effects?
The most important thing: don't stop your statin abruptly without talking to your doctor. Stopping suddenly can increase your risk of a cardiovascular event. There are many options to explore before giving up on statin therapy entirely.
Most people who have difficulty with one statin can successfully take a different type or a modified regimen. There are several statins available, and people often tolerate one much better than another. Taking a statin every other day or twice weekly is another evidence-based option that reduces side effects while maintaining much of the benefit. The key is working collaboratively with your doctor to find what works for you—don't give up without exploring all the possibilities.
Common Misconceptions
Common Myths About Statins — Debunked
Misinformation about statins is widespread, and it leads many people to avoid or discontinue a medication that could genuinely protect their health. Here's what the evidence actually shows.
❌ Myth: "Statins Are Dangerous"
Fact: Statins are among the most studied medications in history. Serious side effects are rare, and the benefits in preventing heart attacks and strokes are well-established. Over 30 years of research involving hundreds of thousands of people confirm their safety.
❌ Myth: "I Can Fix My Cholesterol With Diet Alone"
Fact: While diet is important, most of your cholesterol is made by your liver—not absorbed from food. For people at higher cardiovascular risk, diet alone is usually not enough. Diet typically lowers cholesterol by 10–15%, while statins lower it by 30–55%.
❌ Myth: "Natural Supplements Are Safer Than Statins"
Fact: "Natural" doesn't mean safe or effective. Red yeast rice contains the same active ingredient as some statins but in unregulated amounts. Supplements are not held to the same safety and efficacy standards as prescription medications, and none have been proven to reduce heart attacks or strokes.
❌ Myth: "Statins Cause Memory Loss"
Fact: Multiple large studies show no link between statins and cognitive decline. Memory concerns are more likely related to ageing or other factors. Some research even suggests statins may help protect brain health by reducing the risk of vascular dementia.
The Bottom Line
Statins are powerful, well-evidenced tools for preventing heart attacks and strokes. For people at higher cardiovascular risk, the benefits are clear and substantial. Side effects, while possible, are generally mild and much less common than many people believe.
The decision to take a statin should be individualised—based on your specific risk factors, health goals, and personal preferences. The best approach is an open, honest conversation with your doctor.
Know Your Risk
Ask your doctor to use the Australian CVD Risk Calculator to assess your personal five-year cardiovascular risk.
Understand Your Benefits
Discuss the potential benefits of a statin specifically for you, based on your risk profile and health history.
Voice Your Concerns
Share any concerns about side effects openly. Your doctor can help you weigh the evidence and address specific worries.
Explore Your Options
Ask about lifestyle changes and alternative medications if you're uncertain about statins—there may be other paths forward.
You and your doctor are on the same team. 
Statins are recommended when benefit outweighs risk. 
The decision is yours — make it an informed one.