- Statins are the first-choice medicine. Depending on type and strength, they lower LDL by about 30% to 50% or more.
- Across large trials, each 1 mmol/L (39 mg/dL) lower LDL meant about 22% fewer heart attacks, strokes and related events.
- In blinded trials, more than 90% of muscle aches reported by people on statins were not caused by the statin.
- Ezetimibe, PCSK9 medicines, inclisiran and bempedoic acid can be added when a statin is not enough or not tolerated.
If your doctor has suggested a cholesterol medicine, you may have questions. How does it work? Will I need it forever? What about side effects? This guide explains the main options in plain language, what the big trials found and what to expect. It does not replace advice from your own doctor, who will match the choice to your overall heart risk.
Medicine is not a sign that healthy habits failed. Genes, age and other conditions strongly shape LDL, and for many people medicine plus lifestyle is the safest route. See How to Lower LDL Cholesterol for the lifestyle side.
Never stop or change a cholesterol medicine on your own. Stopping a statin can let LDL rise back within weeks. If you have side effects or concerns, talk to your doctor. There is almost always another option.
How statins work
From tablet to lower LDL
How much statins lower LDL
Typical LDL lowering by statin intensity
2018 AHA/ACC cholesterol guideline (Grundy et al., Circulation 2019). Intensity depends on which statin is used and its strength, which your doctor chooses.
The benefit depends on how much LDL falls and for how long. A pooled analysis of 26 trials with 170,000 people found that each 1 mmol/L (about 39 mg/dL) reduction in LDL lowered major vascular events by about 22%. People at higher risk, such as those with heart disease or diabetes, gain the most.
CTT Collaboration, Lancet 2010 and Lancet 2022; Wood et al., N Engl J Med 2020.
Side effects: the facts
Muscle aches are the concern people raise most. A 2022 analysis of blinded trials with over 150,000 people found that statins caused only a small excess of muscle symptoms, mostly in the first year. More than 90% of the muscle symptoms reported by people on statins would have happened anyway. Serious muscle damage is very rare.
The SAMSON trial tested this directly. People who had stopped statins because of side effects took statin tablets, identical dummy tablets and no tablets in different months. About 90% of the symptoms they felt on the statin also appeared on the dummy tablets. This is called the nocebo effect: expecting side effects can make you feel them.
Statins can raise blood sugar slightly, and a small number of people who are already close to the diabetes threshold are diagnosed a little sooner. For people who need a statin, the heart benefit is much larger than this risk. Liver problems are uncommon. If you get unexplained muscle pain, weakness or dark urine, contact your doctor.
Other medicines
| Medicine | How it works | What the trial showed |
|---|---|---|
| Ezetimibe (tablet) | Blocks cholesterol absorption in the gut. Often added to a statin. | IMPROVE-IT: after a heart attack or unstable angina, adding it to a statin lowered LDL further and modestly reduced events over 7 years. |
| PCSK9 antibodies (injection every 2 or 4 weeks) | Stop a protein that destroys LDL receptors, so the liver clears much more LDL. | FOURIER: evolocumab lowered LDL by 59% and cut major events by about 15% in people with heart disease already on statins. |
| Inclisiran (injection twice a year after the first doses) | Tells the liver to make less PCSK9, with a similar end result. | ORION-10 and ORION-11: LDL fell by about half. Large trials are testing its effect on heart attacks and strokes. |
| Bempedoic acid (tablet) | Blocks cholesterol production in the liver at a step before statins act. It does not act in muscle. | CLEAR Outcomes: in people who could not tolerate statins, it lowered LDL by about 21% more than placebo and major events by 13%. |
Cannon et al., NEJM 2015; Sabatine et al., NEJM 2017; Ray et al., NEJM 2020; Nissen et al., NEJM 2023.
In IMPROVE-IT, average LDL was about 54 mg/dL with the combination versus about 70 mg/dL with the statin alone. That extra lowering reduced events by roughly 6%, which fits the “lower is better” pattern seen in statin trials. Other medicines, such as fibrates and prescription omega-3, are mainly used for very high triglycerides. Read Triglycerides Explained for more.
Who usually needs medicine
- People with heart disease, a past stroke or narrowed arteries.
- Adults with LDL of 190 mg/dL (4.9 mmol/L) or more.
- Many adults with diabetes, usually from age 40. See Diabetes and Heart Health.
- People whose estimated 10-year heart risk is high after lifestyle changes.
Your doctor will usually recheck your lipids 4–12 weeks after starting or changing a medicine to see how well it is working. To understand your targets, read Understanding Cholesterol Numbers.
Practical tips for taking them well
Take it at the same time each day, linked to a daily habit such as brushing your teeth. A phone reminder helps.
Tell your doctor and pharmacist about all medicines, supplements and herbal products, as some interact with statins.
Statins are usually stopped before and during pregnancy. Talk to your doctor before you try to conceive.
MythOnce my LDL is normal, I can stop my statin.
FactLDL is normal because of the statin. Stopping it usually lets LDL rise again. Any change should be planned with your doctor.
Common questions
Do I have to take a statin for life?
Usually, yes, because the benefit builds the longer LDL stays low. Your doctor may adjust the medicine over time.
What if I cannot tolerate a statin?
Many people can take a different statin, a lower strength or a different schedule. If not, ezetimibe, bempedoic acid or injectable medicines are options.
Can I stop my medicine if I improve my diet?
Not on your own. Better habits may mean you need less medicine, but only your doctor can decide that after checking your numbers and risk.
- Statins lower LDL by about 30% to over 50% and have the strongest evidence.
- Each 1 mmol/L lower LDL cuts major events by about 22%.
- Most muscle aches on statins are not caused by the statin.
- Ezetimibe, PCSK9 medicines, inclisiran and bempedoic acid add further options.
- Next: Cholesterol, Prediabetes and Fatty Liver: How They Connect.
Sources
- Grundy SM, Stone NJ, Bailey AL, et al. 2018 AHA/ACC guideline on the management of blood cholesterol. Circulation. 2019;139(25):e1082–e1143.
- Cholesterol Treatment Trialists’ Collaboration. Efficacy and safety of more intensive lowering of LDL cholesterol: a meta-analysis of data from 170,000 participants in 26 randomised trials. Lancet. 2010;376(9753):1670–1681.
- Cholesterol Treatment Trialists’ Collaboration. Effect of statin therapy on muscle symptoms: an individual participant data meta-analysis of large-scale, randomised, double-blind trials. Lancet. 2022;400(10355):832–845.
- Wood FA, Howard JP, Finegold JA, et al. N-of-1 trial of a statin, placebo, or no treatment to assess side effects. N Engl J Med. 2020;383(22):2182–2184.
- Cannon CP, Blazing MA, Giugliano RP, et al. Ezetimibe added to statin therapy after acute coronary syndromes. N Engl J Med. 2015;372(25):2387–2397.
- Sabatine MS, Giugliano RP, Keech AC, et al. Evolocumab and clinical outcomes in patients with cardiovascular disease. N Engl J Med. 2017;376(18):1713–1722.
- Ray KK, Wright RS, Kallend D, et al. Two phase 3 trials of inclisiran in patients with elevated LDL cholesterol. N Engl J Med. 2020;382(16):1507–1519.
- Nissen SE, Lincoff AM, Brennan D, et al. Bempedoic acid and cardiovascular outcomes in statin-intolerant patients. N Engl J Med. 2023;388(15):1353–1364.
This article is for general education and is not a substitute for advice from your own doctor or healthcare team.