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Indapamide

Phase 2

Hypertension | Small molecule | Cardiovascular |Alnylam Pharmaceuticals, Inc.|Last Updated: Nov 3, 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 Trials1
Total Enrollment663
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT05103332Zilebesiran as Add-on Therapy in Patients With Hypertension Not Adequately Controlled by a Standard of Care Antihypertensive Medication (KARDIA-2)PHASE2 COMPLETED 663Nov 5, 2021Sep 13, 2024Nov 3, 2025110 United States, Canada +6
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Study Endpoints
Primary Endpoints
Indapamide: Change From Baseline at Month 3 in 24-hour Mean SBP Assessed by ABPM - Censored Data
Baseline and Month 3

24-hour ABPM device was programmed to take readings every 20 minutes during day (6 am- 9:59 pm) and every 30 minutes during night (10 pm-5:59 am). 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 24-hour ABPM, the hourly adjusted mean was calculated. Hourly adjusted mean was the average BP for 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. Hypothetical strategy was used for the intercurrent event of using antihypertensive escape medication, i.e., data for SBP assessed using ABPM, while participants were on and within 2 weeks after stopping any escape medication were censored for this endpoint.

Amlodipine: Change From Baseline at Month 3 in 24-hour Mean SBP Assessed by ABPM - Censored Data
Baseline and Month 3

24-hour ABPM device was programmed to take readings every 20 minutes during day (6 am- 9:59 pm) and every 30 minutes during night (10 pm-5:59 am). 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 24-hour ABPM, the hourly adjusted mean was calculated. Hourly adjusted mean was the average BP for each hour of the day. The 24-hour mean was the average of the hourly means. LS mean and SE were calculated using a MMRM approach. Hypothetical strategy was used for the intercurrent event of using antihypertensive escape medication, i.e., data for SBP assessed using ABPM, while participants were on and within 2 weeks after stopping any escape medication were censored for this endpoint.

Olmesartan: Change From Baseline at Month 3 in 24-hour Mean SBP Assessed by ABPM - Censored Data
Baseline and Month 3

24-hour ABPM device was programmed to take readings every 20 minutes during day (6 am- 9:59 pm) and every 30 minutes during night (10 pm-5:59 am). 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 24-hour ABPM, the hourly adjusted mean was calculated. Hourly adjusted mean was the average BP for each hour of the day. The 24-hour mean was average of the hourly means. LS mean and SE were calculated using a MMRM approach. Hypothetical strategy was used for the intercurrent event of using antihypertensive escape medication, i.e., data for SBP assessed using ABPM, while participants were on and within 2 weeks after stopping any escape medication were censored for this endpoint.

Secondary Endpoints
Indapamide: Change From Baseline at Month 3 in Office SBP - Censored Data
Baseline and Month 3
Indapamide: Time-adjusted Change From Baseline Through Month 6 in 24-hour Mean SBP, Assessed by ABPM - All Collected Data
Baseline through Month 6
Indapamide: Time-adjusted Change From Baseline Through Month 6 in Office SBP - All Collected Data
Baseline through Month 6
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Study Design & Arms
AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Placebo (Add-on to Indapamide)PLACEBO_COMPARATORFollowing a 4-week run-in treatment on indapamide, 2.5 milligrams (mg), orally, once daily (QD), eligible participants were randomized to receive placebo matched to zilebesiran as a subcutaneous (SC) injection on Day 1 of 6-month double-blind (DB) treatment period as add-on therapy to indapamide. Participants received protocol-assigned background medication for 6 months, after which it was discontinued. Thereafter, participants will receive zilebesiran once every 6 months (Q6M) during the open-label extension (OLE) period. Upon implementation of Amendment 3, the OLE period was closed.
Zilebesiran (Add-on to Indapamide)EXPERIMENTALFollowing a 4-week run-in treatment on indapamide, 2.5 mg, orally, QD, eligible participants were randomized to receive zilebesiran 600 mg, as a SC injection on Day 1 of 6-month DB treatment period as add-on therapy to indapamide. Participants received protocol-assigned background medication for 6 months, after which it was discontinued. Thereafter, participants will receive zilebesiran, Q6M during the OLE period. Upon implementation of Amendment 3, the OLE period was closed.
Placebo (Add-on to Amlodipine)PLACEBO_COMPARATORFollowing a 4-week run-in treatment on amlodipine, 5 mg, orally, QD, eligible participants were randomized to receive placebo matched to zilebesiran as a SC injection on Day 1 of 6-month DB treatment period as add-on therapy to amlodipine. Participants received protocol-assigned background medication for 6 months, after which it was discontinued. Thereafter, participants will receive zilebesiran Q6M during the OLE period. Upon implementation of Amendment 3, the OLE period was closed.
Zilebesiran (Add-on to Amlodipine)EXPERIMENTALFollowing a 4-week run-in treatment on amlodipine, 5 mg, orally, QD, eligible participants were randomized to receive zilebesiran 600 mg, as a SC injection on Day 1 of 6-month DB treatment period as add-on therapy to amlodipine. Participants received protocol-assigned background medication for 6 months, after which it was discontinued. Thereafter, participants will receive zilebesiran, Q6M during the OLE period. Upon implementation of Amendment 3, the OLE period was closed.
Placebo (Add-on to Olmesartan)PLACEBO_COMPARATORFollowing a 4-week run-in treatment on olmesartan, 40 mg, orally, QD, (or 20 mg, orally, QD for participants with creatinine clearance ≤60 milliliters per minute \[mL/min\] at screening enrolled at sites outside of the United States \[US\] consistent with local labeling), eligible participants were randomized to receive placebo matched to zilebesiran as a SC injection on Day 1 of 6-month DB treatment period as add-on therapy to olmesartan. Participants received protocol-assigned background medication for 6 months, after which it was discontinued. Thereafter, participants will receive zilebesiran Q6M during the OLE period. Upon implementation of Amendment 3, the OLE period was closed.
Zilebesiran (Add-on to Olmesartan)EXPERIMENTALFollowing a 4-week run-in treatment on olmesartan, 40 mg, orally, QD, (or 20 mg, orally, QD for participants with creatinine clearance ≤60 mL/min at screening enrolled at sites outside of the US consistent with local labeling), eligible participants were randomized to receive zilebesiran 600 mg, as a SC injection on Day 1 of 6-month DB treatment period as add-on therapy to olmesartan. Participants received protocol-assigned background medication for 6 months, after which it was discontinued. Thereafter, participants will receive zilebesiran, Q6M during the OLE period. Upon implementation of Amendment 3, the OLE period was closed.
Interventions
NameTypeDescription
IndapamideDRUGIndapamide administered orally
AmlodipineDRUGAmlodipine administered orally
OlmesartanDRUGOlmesartan administered orally
PlaceboDRUGPlacebo administered by SC injection
ZilebesiranDRUGZilebesiran administered by SC injection
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Eligibility Criteria
Age Range18 Years — 75 Years
SexALL
Healthy VolunteersNo
Study Sites110

Inclusion Criteria: * Office SBP at Screening as follows: 1. ≥155 mmHg and ≤180 mmHg for patients with untreated hypertension 2. ≥145 mmHg and ≤180 mmHg for patients on antihypertensive medications * 24-hour mean SBP ≥130 mmHg and ≤160 mmHg by ABPM after at least 4 weeks of run-in Exclusion C...

Countries:United StatesCanadaEstoniaGermanyLatviaLithuaniaPolandUnited Kingdom
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