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What Is Olezarsen?

Olezarsen is a prescription medication marketed as Tryngolza. It is an apolipoprotein C-III-directed antisense oligonucleotide used to reduce elevated triglyceride levels. It is approved as an adjunct to diet for adults with familial chylomicronemia syndrome, a rare genetic disorder associated with extremely high triglycerides. Under an expanded U.S. indication approved in June 2026, olezarsen also reduces triglycerides and the risk of acute pancreatitis in adults with severe hypertriglyceridemia. It is administered by subcutaneous injection once monthly.

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What Is Olezarsen?

Olezarsen is a prescription medication marketed as Tryngolza. It is an apolipoprotein C-III-directed antisense oligonucleotide used to reduce elevated triglyceride levels. It is approved as an adjunct to diet for adults with familial chylomicronemia syndrome, a rare genetic disorder associated with extremely high triglycerides. Under an expanded U.S. indication approved in June 2026, olezarsen also reduces triglycerides and the risk of acute pancreatitis in adults with severe hypertriglyceridemia. It is administered by subcutaneous injection once monthly.

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How Does Olezarsen Work?

Olezarsen targets messenger RNA responsible for producing apolipoprotein C-III, a protein that regulates triglyceride metabolism. By reducing production of this protein in the liver, olezarsen helps the body clear triglyceride-rich particles from the bloodstream. This lowers circulating triglyceride levels in patients with certain severe lipid disorders. Its mechanism differs from statins, which primarily affect cholesterol synthesis. Olezarsen is used alongside dietary management rather than as a replacement for nutritional treatment.

What Conditions Does Olezarsen Treat?

Olezarsen is approved for adults with familial chylomicronemia syndrome to reduce triglycerides alongside dietary treatment. It is also approved for adults with severe hypertriglyceridemia, defined in its U.S. indication as triglyceride levels of at least 500 mg/dL, to reduce triglycerides and the risk of acute pancreatitis. These conditions can involve the accumulation of triglyceride-rich lipoproteins in the blood. A clinician evaluates lipid levels, medical history, and the underlying disorder before starting treatment.

How Is Olezarsen Administered?

Olezarsen is administered once monthly using a single-dose subcutaneous autoinjector. The recommended dose for adults with familial chylomicronemia syndrome is 80 mg monthly. For severe hypertriglyceridemia, treatment begins at 50 mg monthly, with an increase to 80 mg possible when additional triglyceride reduction is needed and treatment is tolerated. Injections can be given in the abdomen or front of the thigh. A caregiver or healthcare professional can also administer the medication into the back of the upper arm. Patients should follow the prescribed dietary plan.

What Are the Side Effects and Warnings of Olezarsen?

Possible adverse effects include injection-site reactions, joint pain, and reduced platelet counts. Serious hypersensitivity reactions can occur, including breathing difficulties, facial swelling, and widespread skin reactions. Liver enzyme elevations are another recognized concern under updated prescribing information. Clinicians monitor laboratory findings and treatment response when appropriate. Patients with a history of serious hypersensitivity to olezarsen should not receive the medication. Severe allergic symptoms require immediate medical attention.

Common Questions About Olezarsen

Is olezarsen the same as Tryngolza?

Yes. Tryngolza is the brand name for olezarsen, an injectable antisense oligonucleotide that reduces triglycerides.

Can olezarsen reduce the risk of pancreatitis?

Yes. Olezarsen is approved to reduce triglycerides and the risk of acute pancreatitis in adults with severe hypertriglyceridemia when used alongside dietary treatment.

How often is olezarsen injected?

Olezarsen is administered once monthly. The recommended dose depends on whether treatment is for familial chylomicronemia syndrome or severe hypertriglyceridemia.

Is olezarsen a statin?

No. Olezarsen is an antisense oligonucleotide that targets apolipoprotein C-III production. It has a different mechanism from statins.

References

DailyMed - TRYNGOLZA (olezarsen sodium) injection, solution. https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=0f51aa8e-8475-8cf9-e063-6394a90a6848. Date Accessed October 22, 2026.

FDA Approves First Treatment Shown to Reduce the Risk of Acute Pancreatitis in Adults with Severe Hypertriglyceridemia. U.S. Food and Drug Administration. https://www.fda.gov/drugs/news-events-human-drugs/fda-approves-first-treatment-shown-reduce-risk-acute-pancreatitis-adults-severe-hypertriglyceridemia. Date Accessed October 22, 2026.

Olezarsen, Acute Pancreatitis, and Familial Chylomicronemia Syndrome. New England Journal of Medicine. https://pubmed.ncbi.nlm.nih.gov/38587247/. Date Accessed October 22, 2026.

Olezarsen for Managing Severe Hypertriglyceridemia and Pancreatitis Risk. New England Journal of Medicine. https://pubmed.ncbi.nlm.nih.gov/41211918/. Date Accessed October 22, 2026.

Olezarsen Injection. MedlinePlus. https://medlineplus.gov/druginfo/meds/a625020.html. Date Accessed October 22, 2026.