"My doctor wants to put me on statins — do I actually need them?"

Why your doctor prescribed statins — and why the answer isn't as simple as yes or no

Statins are a class of drugs — including atorvastatin (Lipitor), rosuvastatin (Crestor), and simvastatin — that lower LDL cholesterol by blocking an enzyme in the liver called HMG-CoA reductase. Elevated LDL is associated with plaque buildup in arteries, which over time increases the risk of heart attack and stroke. That's the straightforward part. The part your doctor may not have had time to explain is that the degree of benefit from a statin depends enormously on your personal baseline risk — and for a large portion of people being prescribed them today, that benefit is measurably smaller than most people assume.

Cardiologists divide statin candidates into two broad camps: secondary prevention (you've already had a heart attack, stroke, or been diagnosed with cardiovascular disease) and primary prevention (your cholesterol is high, but you've never had a cardiovascular event). The evidence for statins in the secondary prevention group is genuinely strong — they reduce the risk of a second event meaningfully. For primary prevention, the picture is far murkier. A landmark 2019 Cochrane review of 19 trials found statins do reduce events in primary prevention patients, but the absolute risk reduction — the number that actually matters to you personally — is typically 1 to 2 percentage points over five years. That means roughly 100 people need to take a statin for five years for approximately one to two of them to avoid a heart attack or stroke they otherwise would have had.

None of this means statins are useless or that your doctor is wrong. It means the decision is not automatic, and it should be made with a clear-eyed look at your personal 10-year cardiovascular risk score, your lifestyle, your willingness to tolerate potential side effects, and whether non-drug interventions have been genuinely tried first. That conversation doesn't always happen in a 15-minute appointment — but it's the conversation you deserve to have.

The statin question looks different depending on where you're starting from

People land at this question from very different places — and where you're starting from matters a great deal for how you should be thinking about the answer.

Getting this decision wrong cuts both ways — taking statins you don't need carries real costs, and avoiding them when you do need them carries real risks

For people in the secondary prevention category — those who have already had a cardiovascular event — declining statins is a decision with well-documented consequences. Studies consistently show a meaningful increase in recurrent heart attacks and cardiovascular mortality in this group when statins are stopped. If you're in this camp, the bar for opting out is high, and you should have a very specific evidence-based reason, not just general reluctance.

For primary prevention patients, the calculation is genuinely different. Statins are not without side effects: real-world data — as opposed to the cleaner populations in industry-sponsored trials — show muscle symptoms in 5–10% of users, and a documented increase in the risk of new-onset type 2 diabetes of approximately one additional case per 255 patients treated over four years. Unnecessary medication carries unnecessary risk. But if your 10-year cardiovascular risk is high (above 10% on validated scoring tools like the Pooled Cohort Equations), untreated elevated LDL in the presence of other risk factors also carries real danger. The mistake to avoid is treating this decision as either automatically obvious or automatically trivial — it is neither.