Inclisiran (brand name Leqvio) is a newer cholesterol-lowering injection given by your provider just twice a year after two starter doses. It uses small interfering RNA to lower the liver's production of PCSK9, a protein that limits how much LDL your liver clears, and it lowers LDL cholesterol by about half. That makes it a strong option for people who cannot get their LDL or ApoB low enough on a statin alone. The important caveat is that the trials so far have proven it lowers cholesterol, but the studies testing whether it prevents heart attacks and strokes are still ongoing. It is well tolerated, with injection-site reactions the main side effect, and it is expensive.
TL;DR: Inclisiran, sold as Leqvio, is a cholesterol-lowering injection that uses RNA interference to lower the liver's production of PCSK9, which drops LDL cholesterol by about half. After two starter doses, it is given only twice a year, which solves the everyday burden of a daily pill. It is a strong option for people whose LDL or ApoB stays too high on a statin. The catch is that its cholesterol-lowering is proven while its heart-attack and stroke prevention is not yet: the large outcome trials are still running, with the first results expected around 2026. It is added on top of a statin rather than used in its place, it is well tolerated apart from injection-site reactions, and it is expensive.
What is inclisiran, and how does it work?
Inclisiran, sold as Leqvio, is a cholesterol-lowering medicine that works in a way no pill does. It is a small interfering RNA, or siRNA, a type of drug that silences a specific gene. In this case it silences the liver's production of a protein called PCSK9. PCSK9 acts like a brake on your body's cholesterol removal: it breaks down the LDL receptors your liver uses to pull LDL cholesterol out of the blood. Fewer receptors means higher LDL. By telling the liver to make less PCSK9, inclisiran leaves more of those receptors in place, and your LDL falls.
The injection is engineered to be absorbed mostly by the liver, which is what lets it work for months from a single dose. After two starter injections, one at the beginning and one at three months, it is given twice a year. That is the headline that draws people in: a cholesterol treatment you handle at a couple of visits a year rather than a daily pill.
How well does it lower cholesterol?
On this measure, inclisiran is strong. In the two pivotal trials, ORION-10 and ORION-11, it lowered LDL cholesterol by about 50% compared with placebo in people already taking the highest statin dose they could tolerate.1 In people with an inherited cholesterol disorder called familial hypercholesterolemia, a separate trial found a similar drop of roughly 48%.2 An earlier dose-finding study set the twice-a-year schedule.3
That degree of lowering matters because LDL, and the ApoB particle count it travels with, is the main driver of plaque in the arteries. Cutting it in half on top of a statin brings many people to a target they could not reach otherwise.
Does inclisiran prevent heart attacks and strokes?
Here is the part that gets glossed over, and the part I care most about. Lowering LDL is not the goal in itself; the goal is fewer heart attacks and strokes. For statins and for the PCSK9 antibodies, we have large trials proving they lower that risk. For inclisiran, we do not have that proof yet. Every published inclisiran trial has measured cholesterol rather than events.
The trials that will answer the question are underway. ORION-4, a study of about 15,000 people with established heart disease, is expected to report around 2026, with two more outcome trials following over the next several years. Until they read out, the expectation that inclisiran prevents heart attacks rests on inference: it lowers LDL a great deal, and lowering LDL by other means lowers risk, so it very likely helps. That is a reasonable expectation, but it is not the same as proof, and I think patients deserve to know the difference.
How does it compare to statins and PCSK9 inhibitors?
A statin is still the foundation. It is proven to prevent events, it is inexpensive, and it does more than lower LDL. Inclisiran is not a replacement for a statin; in the trials it was added on top of one.
The closer comparison is to the PCSK9 inhibitors, evolocumab and alirocumab. Those are also injections that target PCSK9, and they are proven to lower cardiovascular events.4 The difference is how, and how often. The PCSK9 antibodies mop up the PCSK9 protein already in the blood, and are injected every two to four weeks, usually by the patient at home. Inclisiran works one step earlier, telling the liver to make less PCSK9 in the first place, which is what lets it last six months. The trade-off is that the antibodies have the outcome proof today, while inclisiran offers the convenience of twice-a-year dosing with that proof still pending.
For many people the deciding factors are practical: how often you want an injection, whether you would rather manage it yourself or have it done in the office, what your insurance covers, and how you weigh proven benefit against convenience.
Who is inclisiran for, and what does it cost?
Inclisiran fits a specific situation: someone whose LDL or ApoB is still too high despite a statin, or who cannot tolerate enough statin, and who needs substantial extra lowering. The FDA first approved it in 2021 for people with established heart disease or an inherited cholesterol disorder, and it has since been expanded to a broader group at high risk, including some who have not yet had a cardiovascular event.5
Two practical points shape the decision. First, it is given in a medical setting rather than self-injected, so it means a visit for each dose, which for most people is three in the first year and two a year after that. Second, it is expensive, roughly $3,000 or more per injection, on the order of $6,500 a year, usually billed through your medical benefit rather than the pharmacy. Whether that is worth it depends on how far your LDL needs to come down, what your other options are, and what your coverage looks like. This is a decision to make with a physician who knows your full risk picture.
Guidance from the Clinic
Key Takeaways
- Inclisiran (Leqvio) is a twice-a-year injection that uses RNA interference to lower the liver's production of PCSK9, cutting LDL cholesterol by about 50%.
- After two starter doses (day one and month three), it is given every six months, so the first year is three injections and later years are two.
- Its cholesterol-lowering is proven, but its heart-attack and stroke prevention is not yet, with the large outcome trials expected to report from about 2026 onward.
- It is added on top of a statin rather than used as a replacement, and the closest comparison is the PCSK9 antibodies, which already have outcome proof but are injected far more often.
- It is well tolerated, with injection-site reactions the main side effect, and it is expensive (roughly $6,500 a year), usually billed through the medical benefit.
Related at Fishtown Medicine
- Beyond Statins: Other Ways to Lower Cholesterol and ApoB - where inclisiran fits among the options
- PCSK9 Inhibitors (Repatha, Praluent) - the antibody cousins with proven outcome trials
- ApoB and Heart Health - the particle count worth targeting
- What Is a Preventive Cardiologist? - the decision layer around these choices
- Nervous About Statins? - working through statin concerns first
- Advanced Lipid Testing in Philadelphia - measuring ApoB and LDL properly
Scientific References
- Ray KK, Wright RS, Kallend D, et al. "Two Phase 3 Trials of Inclisiran in Patients with Elevated LDL Cholesterol." New England Journal of Medicine. 2020;382(16):1507-1519.
- Raal FJ, Kallend D, Ray KK, et al. "Inclisiran for the Treatment of Heterozygous Familial Hypercholesterolemia." New England Journal of Medicine. 2020;382(16):1520-1530.
- Ray KK, Landmesser U, Leiter LA, et al. "Inclisiran in Patients at High Cardiovascular Risk with Elevated LDL Cholesterol." New England Journal of Medicine. 2017;376(15):1430-1440.
- Sabatine MS, Giugliano RP, Keech AC, et al. "Evolocumab and Clinical Outcomes in Patients with Cardiovascular Disease." New England Journal of Medicine. 2017;376(18):1713-1722.
- U.S. Food and Drug Administration. Leqvio (inclisiran) prescribing information and approval history. 2021, with label expansions in 2023 and 2025.
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