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Eplontersen

Phase 3

Transthyretin Amyloid Cardiomyopathy | Small molecule | Cardiovascular |AstraZeneca PLC|Last Updated: Jul 14, 2026

Target and mechanism

Molecular targetTTR
Target classAntisense Inhibitor
ModalitySmall molecule

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLED
Total Trials1
Total Enrollment64

FDA Designations

No designations recorded

Clinical trial landscape

Eplontersen · 3 trials · 3 indications

Phase 3 1Phase 2 1Phase 1 1
NCT06194825EPIC-ATTR: A Study to Evaluate the Effect of Eplontersen on the Transthyretin Reduction and Long-term Safety in Chinese Subjects With Transthyretin Amyloid CardiomyopathyTransthyretin Amyloid Cardiomyopathy
ACTIVE NOT_RECRUITING64 Analytics
PHASE3ACTIVE NOT_RECRUITING
EPIC-ATTR: A Study to Evaluate the Effect of Eplontersen on the Transthyretin Reduction and Long-term Safety in Chinese Subjects With Transthyretin Amyloid Cardiomyopathy
Transthyretin Amyloid CardiomyopathyUnlock trial analytics

Study Endpoints

Primary Endpoints

Percent change of serum TTR concentration from baseline
up to 24 weeks

To evaluate the effect of eplontersen compared to placebo on serum transthyretin (TTR) concentration up to 24 weeks

Cardiopulmonary exercise test peak VO2
52 week

Change from baseline in Cardiopulmonary exercise test peak VO2 at week 52

PK parameters: Maximum Observed Concentration(Cmax)
collect PK sample in pre-dose of Day 1 and 0.5 hours, 1 hours, 1.5 hours, 2 hours, 3 hours, 4 hours, 5 hours, 6 hours, 8 hours, 10 hours, 12 hours, 16 hours, 24 hours, 36 hours, 48 hours of post-dose, and in Day 8, Day 15, Day 29, Day 50, Day 71, Day 92

To characterize the pharmacokinetic (PK) profiles of eplontersen following subcutaneous administration of a single 45 mg dose in healthy Chinese participants

PK parameters: Time to Maximal Concentration (tmax)
collect PK sample in pre-dose of Day 1 and 0.5 hours, 1 hours, 1.5 hours, 2 hours, 3 hours, 4 hours, 5 hours, 6 hours, 8 hours, 10 hours, 12 hours, 16 hours, 24 hours, 36 hours, 48 hours of post-dose, and in Day 8, Day 15, Day 29, Day 50, Day 71, Day 92

To characterize the pharmacokinetic (PK) profiles of eplontersen following subcutaneous administration of a single 45 mg dose in healthy Chinese participants

PK parameters: Plasma Half-life Associated with the Apparent Terminal Elimination Phase (t½λz)
collect PK sample in pre-dose of Day 1 and 0.5 hours, 1 hours, 1.5 hours, 2 hours, 3 hours, 4 hours, 5 hours, 6 hours, 8 hours, 10 hours, 12 hours, 16 hours, 24 hours, 36 hours, 48 hours of post-dose, and in Day 8, Day 15, Day 29, Day 50, Day 71, Day 92

To characterize the pharmacokinetic (PK) profiles of eplontersen following subcutaneous administration of a single 45 mg dose in healthy Chinese participants

PK parameters: Area Under Plasma Concentration-time Curve (0-24 hours) (AUC0-24h)
collect PK sample in pre-dose of Day 1 and 0.5 hours, 1 hours, 1.5 hours, 2 hours, 3 hours, 4 hours, 5 hours, 6 hours, 8 hours, 10 hours, 12 hours, 16 hours, 24 hours, 36 hours, 48 hours of post-dose, and in Day 8, Day 15, Day 29, Day 50, Day 71, Day 92

To characterize the pharmacokinetic (PK) profiles of eplontersen following subcutaneous administration of a single 45 mg dose in healthy Chinese participants

PK parameters: Area Under Plasma Concentration-time Curve (0-168 hours) (AUC0-168h)
collect PK sample in pre-dose of Day 1 and 0.5 hours, 1 hours, 1.5 hours, 2 hours, 3 hours, 4 hours, 5 hours, 6 hours, 8 hours, 10 hours, 12 hours, 16 hours, 24 hours, 36 hours, 48 hours of post-dose, and in Day 8, Day 15, Day 29, Day 50, Day 71, Day 92

To characterize the pharmacokinetic (PK) profiles of eplontersen following subcutaneous administration of a single 45 mg dose in healthy Chinese participants

Secondary Endpoints

Changes from baseline in NT-proBNP serum level
up to 24 weeks
Changes from baseline in hs-cTnT serum level
up to 24 weeks
Plasma concentrations of eplontersen at specified time-points (Week0,2,4,8,12,16,20,24,28,32,36,48,60,72,84,96,104)
up to 124 weeks
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Study Design & Arms

AllocationRANDOMIZED
MaskingDOUBLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
EplontersenEXPERIMENTALEplontersen by subcutaneous injection once every 4 weeks
placeboPLACEBO_COMPARATOREplontersen-matching placebo by subcutaneous injection once every 4 weeks
Eplontersen and ALXN2220EXPERIMENTALSubcutaneous eplontersen and intravenous ALXN2220 every 4 weeks
Eplontersen and placeboPLACEBO_COMPARATORSubcutaneous eplontersen and intravenous placebo every 4 weeks

Interventions

NameTypeDescription
EplontersenDRUGEplontersen by subcutaneous injection
PlaceboDRUGEplontersen-matching placebo by subcutaneous injection
ALXN2220BIOLOGICALALXN2220 delivered intravenously, once every 4 weeks
Eplontersen Solution for InjectionDRUGan autoinjector with 0.8 mL deliverable volume (at 56 mg/mL concentration) will be provided, total dose is 45 mg.
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Eligibility Criteria

Age Range20 Years to 90 Years
SexALL
Healthy VolunteersNo
Study Sites26

Inclusion Criteria: 1. Must have given written informed consent (signed and dated) and any authorizations required by local law and be able to comply with all study requirements. 2. 20 to 90 years of age (inclusive). 3. Females: must be non-pregnant and non-lactating and either: 1. surgically s...

Countries:ChinaUnited StatesCanadaFranceGermanyItalyJapanSpainSwedenUnited Kingdom
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Recent Changes (Last 90 Days)

MEDIUMJul 14, 2026NCT07608354Status: RECRUITING → ACTIVE_NOT_RECRUITING
MEDIUMJul 14, 2026NCT07608354Status: RECRUITING → ACTIVE_NOT_RECRUITING
LOWJun 18, 2026NCT07608354Status: NOT_YET_RECRUITING → RECRUITING
LOWJun 18, 2026NCT07608354Status: NOT_YET_RECRUITING → RECRUITING
LOWJun 18, 2026NCT07608354Status: NOT_YET_RECRUITING → RECRUITING
LOWJun 18, 2026NCT07608354Status: NOT_YET_RECRUITING → RECRUITING
LOWJun 10, 2026NCT07608354lastUpdatePostDate: changed
LOWJun 10, 2026NCT07608354lastUpdatePostDate: changed
LOWJun 9, 2026NCT06194825primaryCompletionDate: changed
LOWJun 9, 2026NCT06194825primaryCompletionDate: changed
LOWJun 9, 2026NCT06194825primaryCompletionDate: changed
LOWJun 9, 2026NCT06194825primaryCompletionDate: changed

Frequently asked questions about Eplontersen

What is Eplontersen used for?

Eplontersen is an investigational drug being developed for transthyretin amyloid cardiomyopathy (ATTR-CM) and transthyretin-mediated amyloidosis. It is currently in Phase 3 clinical development for these cardiovascular conditions.

What does Eplontersen target?

Eplontersen is an antisense oligonucleotide (ASO) that targets transthyretin. It is designed to reduce the production of transthyretin protein, which is involved in the development of transthyretin amyloid cardiomyopathy and transthyretin-mediated amyloidosis.

Who makes Eplontersen?

Eplontersen is being developed by AstraZeneca PLC, a biopharmaceutical company listed on the stock exchange under the ticker symbol AZN.

What phase is Eplontersen in?

Eplontersen is in Phase 3 clinical development. It is an investigational drug and has not been approved by regulatory authorities. Clinical trials are ongoing to evaluate its safety and efficacy in patients with transthyretin amyloid cardiomyopathy.

What clinical trials is Eplontersen in?

Eplontersen is being studied in several clinical trials, including NCT06194825, a Phase 3 study in Chinese subjects with transthyretin amyloid cardiomyopathy; NCT06527755, a Phase 1 study in healthy Chinese volunteers; and NCT07608354, a Phase 2 study evaluating its use with ALXN2220 in adults with ATTR-CM.

Is Eplontersen the same as ALXN2220?

No, Eplontersen is not the same as ALXN2220. They are being studied together in a Phase 2 clinical trial to evaluate the efficacy and safety of concomitant use of Eplontersen and ALXN2220 compared with Eplontersen and placebo in adults with ATTR-CM.