Statins: Who Benefits and What to Expect

Statins are among the most studied medications in medicine and among the most argued about. Some people start one because a single number crossed a line. Others refuse one because a friend had sore legs. Both decisions deserve better information than that.

What a statin does

The liver makes most of the cholesterol in your blood. A statin blocks a key enzyme the liver uses to make it. With less cholesterol made inside, the liver puts more receptors on its surface and pulls LDL particles out of the blood. LDL usually falls by about 30 to 50 percent depending on the drug and dose, and ApoB falls a little less.

ApoB is a count of the particles that carry cholesterol into the artery wall. The more particles traveling through the arteries, the greater the chance one gets stuck. Fewer particles means fewer chances. Across the large statin trials, every drop of about 40 mg/dL in LDL lowered heart attacks and strokes by roughly a fifth, and the benefit grows the longer the lower level is held.

Who gets the most benefit

That relative drop is fairly similar from person to person. The absolute benefit is not, because it depends on where you start. Cutting a 20 percent ten year risk by a fifth prevents about 4 events per 100 people. Cutting a 5 percent risk by the same fifth prevents about 1.

The people who gain the most:

• Anyone who has already had a heart attack, stroke or stent.
• LDL of 190 or higher, which is often inherited.
• Diabetes after about age 40.
• A coronary calcium score above zero, which shows plaque is already forming.
• A high Lp(a), which raises risk on its own.

The general guideline line is an ApoB under 100 for most adults. For members we treat, we aim lower, under 60.

What to expect

Muscle aches are the side effect everyone has heard about, and they are less common than people think. In blinded trials, people taking a placebo report aches nearly as often as people taking the statin. The statin itself accounts for only a small share of the complaints. When aches are real, a lower dose, a different statin or every other day dosing usually solves it, and a CK blood test checks for actual muscle injury.

Statins nudge blood sugar up slightly, mostly in people already close to prediabetes. A mild rise in liver enzymes happens occasionally, and serious liver injury is rare. We recheck lipids and ApoB about 6 to 12 weeks after starting.

A statin does not replace food, training and losing fat around the organs. Those move ApoB, blood pressure and insulin together, and for some people at lower risk they are enough without adding a statin.

We decide with your numbers, not a blanket rule: ApoB, Lp(a), a calcium score when it helps, and your history. If nobody has walked through this with you, it's worth a conversation.

This article is educational and is not medical advice.

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