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ALN-AGT01

Phase 2

Hypertension | Small molecule | Cardiovascular |Alnylam Pharmaceuticals, Inc.|Last Updated: Dec 23, 2025

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
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Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
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Trial Design
RandomizedDouble-BlindPLACEBO_CONTROLLEDDMCBiomarker
Total Trials2
Total Enrollment518
FDA Designations
No designations recorded
Clinical Trials (2)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT04936035A Study to Evaluate Efficacy and Safety of ALN-AGT01 in Patients With Mild To-Moderate HypertensionPHASE2 COMPLETED 394Jul 7, 2021Dec 5, 2024Dec 23, 202575 United States, Canada +3
NCT03934307A Study to Evaluate ALN-AGT01 in Patients With HypertensionPHASE1 COMPLETED 124May 1, 2019Jan 4, 2023Jan 17, 20233 United Kingdom
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Study Endpoints
Primary Endpoints
Change From Baseline at Month 3 in 24-hour Mean SBP Assessed by ABPM
Baseline and Month 3

24-hour ABPM was programmed to take readings every 20 minutes during the day (6 am to 9:59 pm) and every 30 minutes during the night (10 pm to 5:59 am). An ABPM was considered adequate if: 1. the number of successful daytime readings were ≥33, 2. the number of successful nighttime readings were ≥11, 3. no more than 3 hours are not represented (i.e., 3 sections of 60 minutes where 0 valid readings were obtained). To summarize the 24-hour ABPM, the hourly adjusted mean was calculated. Hourly mean was the average of BP by each hour of the day. The 24-hour mean was the average of the hourly means. Least squares (LS) mean and standard error (SE) were calculated using a mixed model repeated measures (MMRM) approach.

Number of Participants with Adverse Events (AEs)
Parts A, B and E: each up to approximately 12 months; Part D: up to approximately 18 months
Secondary Endpoints
Change From Baseline at Month 3 in Mean Sitting Office SBP
Baseline and Month 3
Change From Baseline at Month 6 in 24-hour Mean SBP Assessed by ABPM
Baseline and Month 6
Change From Baseline at Month 6 in Mean Sitting Office SBP
Baseline and Month 6
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Study Design & Arms
AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
PlaceboPLACEBO_COMPARATORParticipants received zilebesiran matching placebo, subcutaneous (SC) injection, once every 3 months (Q3M), with re-randomization at Month 6 to 1 of the initial 4 zilebesiran regimens. Participants will continue their respective zilebesiran regimen up to Month 12 in the DB period and up to 24 additional months in the DB Extension period. Upon implementation of Amendment 6, the DB Extension period was closed.
Zilebesiran 150 Milligrams (mg) Once Every 6 Months (Q6M)EXPERIMENTALParticipants receive zilebesiran, 150 mg, SC injection, Q6M, during the 12-month DB period. Participants will continue receiving the same zilebesiran regimen for up to 24 additional months in the DB Extension period. Participants in this arm will receive a placebo during those dosing visits when they do not receive zilebesiran to maintain the blind. Upon implementation of Amendment 6, the DB Extension period was closed.
Zilebesiran 300 mg Q6MEXPERIMENTALParticipants receive zilebesiran, 300 mg, SC injection, Q6M, during the 12-month DB period. Participants will continue receiving the same zilebesiran regimen for up to 24 additional months in the DB Extension period. Participants in this arm will receive a placebo during those dosing visits when they do not receive zilebesiran to maintain the blind. Upon implementation of Amendment 6, the DB Extension period was closed.
Zilebesiran 300 mg Q3MEXPERIMENTALParticipants receive zilebesiran, 300 mg, SC injection, Q3M, during the 12-month DB period. Participants continue receiving the same zilebesiran regimen for up to 24 additional months in the DB Extension period. Upon implementation of Amendment 6, the DB Extension period was closed.
Zilebesiran 600 mg Q6MEXPERIMENTALParticipants receive zilebesiran, 600 mg, SC injection, Q6M, during the 12-month DB period. Participants will continue receiving the same zilebesiran regimen for up to 24 additional months in the DB Extension period. Participants in this arm will receive a placebo during those dosing visits when they do not receive zilebesiran to maintain the blind. Upon implementation of Amendment 6, the DB Extension period was closed.
Part A: SAD: ALN-AGT01EXPERIMENTALParticipants will be administered a single dose of ALN-AGT01.
Part A: SAD: ALN-AGT01-Matching PlaceboPLACEBO_COMPARATORParticipants will be administered a single dose of ALN-AGT01-matching placebo.
Part B: SD: ALN-AGT01EXPERIMENTALParticipants with controlled salt intake will be administered a single dose of ALN-AGT01.
Part B: SD: ALN-AGT01-Matching PlaceboPLACEBO_COMPARATORParticipants with controlled salt intake will be administered a single dose of ALN-AGT01-matching placebo.
Part D: MD: ALN-AGT01 + Irbesartan-Matching PlaceboEXPERIMENTALParticipants, who are obese, will be administered multiple doses of ALN-AGT01 and irbesartan-matching placebo.
Part D: MD: ALN-AGT01-Matching Placebo + IrbesartanACTIVE_COMPARATORParticipants, who are obese, will be administered multiple doses of ALN-AGT01-matching placebo and irbesartan.
Part E: Open Label: ALN-AGT01 + IrbesartanEXPERIMENTALParticipants will be administered a single dose of ALN-AGT01 and multiple doses of irbesartan.
Interventions
NameTypeDescription
PlaceboDRUGPlacebo administered by SC injection
ALN-AGT01DRUGALN-AGT01 administered by SC injection
ALN-AGT01-Matching PlaceboDRUGNormal saline (0.9% NaCl) matching volume of ALN-AGT01 doses will be administered SC.
IrbesartanDRUGIrbesartan will be administered orally.
Irbesartan-Matching PlaceboDRUGIrbesartan-matching placebo will be administered orally.
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Eligibility Criteria
Age Range18 Years — 75 Years
SexALL
Healthy VolunteersNo
Study Sites75

Inclusion Criteria: * Daytime mean SBP ≥135 mmHg and ≤160 mmHg by ABPM, without antihypertensive medication Exclusion Criteria: * Secondary hypertension, orthostatic hypotension * Alanine aminotransferase (ALT) or aspartate aminotransferase (AST) \>2× upper limit of normal (ULN) * Elevated potass...

Countries:United StatesCanadaPuerto RicoUkraineUnited Kingdom
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