Olezarsen

Key takeaways

Olezarsen belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Olezarsen to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Olezarsen from memory before moving on to harder problems.

Reference excerpt

Olezarsen, sold under the brand name Tryngolza, is a medication used in the treatment of familial chylomicronemia syndrome. It is given by injection under the skin. Olezarsen is an apolipoprotein C-III-directed antisense oligonucleotide. Olezarsen is an antisense oligonucleotide which inhibits the formation of apolipoprotein C3 (apoC-III), a protein that regulates both triglyceride metabolism and liver clearance of chylomicrons and other triglyceride-rich lipoproteins. By reducing serum apoC-III, olezarsen increases clearance of plasma triglycerides. The most common side effects include injection site reactions, low platelet counts, and joint pain. Olezarsen was approved for medical use in the United States in December 2024. The US Food and Drug Administration considers it to be a first-in-class medication.

Medical uses Olezarsen is indicated as an adjunct to diet to reduce triglycerides in adults with familial chylomicronemia syndrome.

Adverse effects The most common side effects include injection site reactions, low platelet counts, and joint pain. There are some reports of allergic (hypersensitivity) reactions, including difficulty breathing, rash, facial swelling, hives, chills, and muscle aches.

Pharmacology Olezarsen is an apolipoprotein C-III-directed antisense oligonucleotide. By binding to apolipoprotein C-III mRNA, it causes its degradation, which in turn increases clearance of plasma triglycerides and very low-density lipoprotein (VLDL).

History The US Food and Drug Administration (FDA) granted the application of olezarsen orphan drug designation in February 2024. In August 2024, the European Medicines Agency granted olezarsen an orphan drug designation. The FDA approved olezarsen based on evidence from a clinical trial (trial 1; NCT04568434) of 66 participants with familial chylomicronemia syndrome. The trial was conducted at 29 sites in 11 countries including Canada, France, Italy, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, the United Kingdom, and the United States. Of the 66 participants, 19 participants were from trial sites in the United States. The benefits and side effects of olezarsen for participants with familial chylomicronemia syndrome were evaluated in the same single clinical trial. Additional trials in participants with hypertriglyceridemia were used to support the safety assessment. The number of participants representing efficacy findings may differ from the number of participants representing safety findings due to different pools of study participants analyzed for efficacy and safety. Enrolled participants were already using other treatments to lower triglycerides, including a low-fat diet and medications (such as fenofibrates, omega-3 fatty acids, and statins). Participants were randomly assigned to receive olezarsen or placebo every four weeks for one year. Neither the participants nor the health care providers knew which treatment was being given.

Society and culture

Legal status Olezarsen was approved for medical use in the United States in December 2024. In July 2025, the Committee for Medicinal Products for Human Use of the European Medicines Agency adopted a positive opinion, recommending the granting of a marketing authorization for the medicinal product Tryngolza, intended for the treatment of adults with familial chylomicronemia syndrome. The applicant for this medicinal product is Ionis Ireland Limited. Olezarsen was authorized for medical use in the European Union in September 2025.

Names Olezarsen is the international nonproprietary name. Olezarsen is sold under the brand name Tryngolza.

References

Further reading Karwatowska-Prokopczuk, Ewa; Tardif, Jean-Claude; Gaudet, Daniel; Ballantyne, Christie M.; Shapiro, Michael D.; Moriarty, Patrick M.; et al. (2022). "Effect of olezarsen targeting APOC-III on lipoprotein size and particle number measured by NMR in patients with hypertriglyceridemia". Journal of Clinical Lipidology. 16 (5): 617–625. doi:10.1016/j.jacl.2022.06.005. PMID 35902351. Tardif, Jean-Claude; Karwatowska-Prokopczuk, Ewa; Amour, Eric St; Ballantyne, Christie M; Shapiro, Michael D; Moriarty, Patrick M; et al. (6 April 2022). "Apolipoprotein C-III reduction in subjects with moderate hypertriglyceridaemia and at high cardiovascular risk". European Heart Journal. 43 (14): 1401–1412. doi:10.1093/eurheartj/ehab820. PMC 8986458. PMID 35025993.

External links "Olezarsen (Code C180652)". NCI Thesaurus. Archived from the original on 8 December 2024. "Olezarsen ( Code - C180652 )". EVS Explore. Clinical trial number NCT04568434 for "A Study of Olezarsen (Formerly Known as AKCEA-APOCIII-LRx) Administered to Patients With Familial Chylomicronemia Syndrome (FCS) (BALANCE)" at ClinicalTrials.gov

Illustrations

Worked examples

Example 1 — a first encounter with Olezarsen

Start with the simplest possible case. Write down what Olezarsen claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Olezarsen before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Olezarsen ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Olezarsen

In research: Olezarsen appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Olezarsen in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Olezarsen is common in secondary-school and first-year university syllabi. It links to neighbouring topics Drugs not assigned an ATC code, Lipid-lowering agents, Orphan drugs, so understanding it makes those chapters shorter.
In everyday life: Look for Olezarsen outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

How to study Olezarsen in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Olezarsen means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Olezarsen out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Olezarsen in simple terms?

Olezarsen, sold under the brand name Tryngolza, is a medication used in the treatment of familial chylomicronemia syndrome. It is given by injection under the skin.

Why does Olezarsen matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Olezarsen?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Olezarsen.