A Study of Olezarsen Administered Subcutaneously to Participants With Severe Hypertriglyceridemia

  • End date
    Jul 19, 2025
  • participants needed
  • sponsor
    Ionis Pharmaceuticals, Inc.
Updated on 19 September 2023


The purpose of this study is to evaluate the efficacy of olezarsen as compared to placebo on the percent change in fasting triglycerides (TG) from baseline.


This is a Phase 3, multi-center, randomized, double-blind, placebo-controlled study in up to approximately 390 participants. Participants will be randomized to receive olezarsen or placebo in a 53-week treatment period. The length of participation in the study will be approximately 78 weeks, which includes an up to 12-week screening period, a 53-week treatment period, and a 13-week post-treatment evaluation period or transition to open-label extension (OLE) study with up to 1-year treatment.

The Screening Period was extended with no impact to overall study timelines. Endpoints added to provide assessment on the pancreatitis rate after olezarsen reaches steady state levels.

Condition Severe Hypertriglyceridemia
Treatment Placebo, Olezarsen
Clinical Study IdentifierNCT05552326
SponsorIonis Pharmaceuticals, Inc.
Last Modified on19 September 2023


Yes No Not Sure

Inclusion Criteria

Fasting TG ≥ 500 mg/dL (5.65 mmol/L) at Screening and Qualification
Participants must be on lipid-lowering therapy that should adhere to standard of care (SOC) per local guidelines. Lipid-lowering medications should be optimized and stabilized for at least 4 weeks prior to screening to minimize changes in these medications during the study
Participants must be willing to comply with diet and lifestyle recommendations as able

Exclusion Criteria

Hemoglobin A1c (HbA1c) ≥ 9.5% at Screening
Alanine aminotransferase or aspartate aminotransferase > 3.0 × upper limit of normal
Total bilirubin > 1.5 ULN unless due to Gilbert's syndrome
Estimated GFR < 30 mL/min/1.73 m^2
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