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XXB750

Phase 1

Heart Failure With Reduced Ejection Fraction (HFrEF) | Small molecule | Cardiovascular |Novartis AG|Last Updated: Sep 30, 2025

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLED
Total Trials1
Total Enrollment27

FDA Designations

No designations recorded

Clinical trial landscape

XXB750 · 2 trials · 3 indications

Phase 1 2
NCT05328752Safety and Tolerability Study of XXB750 in Heart Failure Participants With Reduced or Mildly Reduced Ejection Fraction (HFrEF/HFmrEF)Heart Failure With Reduced Ejection Fraction (HFrEF)
COMPLETED27 Analytics
NCT06558097Safety, Tolerability, and Pharmacokinetics of XXB750 in Healthy ParticipantsXXB750 in Healthy Participants
COMPLETED77 Analytics
PHASE1COMPLETED
Safety and Tolerability Study of XXB750 in Heart Failure Participants With Reduced or Mildly Reduced Ejection Fraction (HFrEF/HFmrEF)
Heart Failure With Reduced Ejection Fraction (HFrEF)Unlock trial analytics
PHASE1COMPLETED
Safety, Tolerability, and Pharmacokinetics of XXB750 in Healthy Participants
XXB750 in Healthy ParticipantsUnlock trial analytics

Study Endpoints

Primary Endpoints

Adverse events, which may include abnormal vital signs, safety lab tests, or ECG parameters that induce clinical signs or symptoms, are considered clinically significant or require therapy
91 days (Cohort 1), 146 days (Cohort 2)

To evaluate the safety and tolerability of XXB750 in adult participants with chronic stable heart failure with reduced or mildly reduced ejection fraction (HFrEF/HFmrEF).

Number of participants with Adverse Events
Up to 121 days

To evaluate the safety and tolerability of single ascending SC doses of XXB750 in healthy participants. Adverse events may include abnormal vital signs, safety laboratory tests, physical exam tests and ECG parameters that include clinical signs or symptoms, are considered clinically significant or require therapy.

Secondary Endpoints

Pharmacokinetics parameters Tmax
91 days (Cohort 1), 146 days (Cohort 2)
Pharmacokinetics parameters Cmax
91 days (Cohort 1), 146 days (Cohort 2)
Pharmacokinetics parameters AUClast for Cohort 1
91 days
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Study Design & Arms

AllocationRANDOMIZED
MaskingDOUBLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
XXB750 Cohort 1EXPERIMENTALXXB750, single dose
Placebo Cohort 1PLACEBO_COMPARATORPlacebo, single dose
XXB750 Cohort 2EXPERIMENTALXXB750, multiple doses
Placebo Cohort 2PLACEBO_COMPARATORPlacebo, multiple doses
XXB750 s.c 1 mgEXPERIMENTALSingle SC dose of XXB750 1 mg
XXB750 s.c 3 mgEXPERIMENTALSingle SC dose of XXB750 3 mg
XXB750 s.c 10 mgEXPERIMENTALSingle SC dose of XXB750 10 mg
XXB750 s.c 30 mgEXPERIMENTALSingle SC dose of XXB750 30 mg
XXB750 s.c 60 mgEXPERIMENTALSingle SC dose of XXB750 60 mg
XXB750 s.c 120 mgEXPERIMENTALSingle SC dose of XXB750 120 mg
XXB750 s.c 240 mgEXPERIMENTALSingle SC dose of XXB750 240 mg
PlaceboPLACEBO_COMPARATORPlacebo to XXB750
XXB750 s.c 240 mg Japanese cohortEXPERIMENTALSingle SC dose of XXB750 240 mg in the Japanese cohort
Placebo for Japanese cohortPLACEBO_COMPARATORPlacebo to XXB750 in the Japanese cohort
XXB750 s.c 450 mg (HBP)EXPERIMENTALSingle SC dose of XXB750 450 mg (High Blood Pressure Cohort)
XXB750 s.c 600 mg (HBP)EXPERIMENTALSingle SC dose of XXB750 600 mg (High Blood Pressure Cohort)
Placebo to High Blood Pressure cohortPLACEBO_COMPARATORPlacebo to XXB750 in High Blood Pressure cohorts

Interventions

NameTypeDescription
XXB750DRUGXXB750
PlaceboDRUGPlacebo
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Eligibility Criteria

Age Range18 Years to 80 Years
SexALL
Healthy VolunteersNo
Study Sites4

Key Inclusion Criteria: * NYHA functional class II-III * LVEF ≤ 50% documented at screening * Systolic blood pressure 110 - 160 mmHg (cohort 1) or 105-160 mmHg (cohort 2), and heart rate between 50-90 beats per minute, inclusive * Treatment with a stable dose of a beta blocker. * Cohort 1: Treatmen...

Countries:United StatesNetherlands
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Frequently asked questions about XXB750

What is XXB750 used for?

XXB750 is an investigational small molecule being studied for heart failure with reduced ejection fraction (HFrEF) and heart failure with mildly reduced ejection fraction (HFmrEF). It has also been evaluated in healthy participants to assess safety, tolerability, and pharmacokinetics. The drug is in Phase 1 clinical development.

Who makes XXB750?

XXB750 is being developed by Novartis AG, a multinational pharmaceutical company traded on the New York Stock Exchange under the ticker symbol NVS. The company is conducting clinical trials to evaluate the drug's safety and tolerability in heart failure patients and healthy volunteers.

What phase is XXB750 in?

XXB750 is in Phase 1 clinical development. Two Phase 1 trials have been completed: one in heart failure participants with reduced or mildly reduced ejection fraction and another in healthy participants. The drug is investigational and has not been approved by regulatory authorities.

What clinical trials is XXB750 in?

XXB750 has been studied in two completed Phase 1 trials. NCT05328752 evaluated safety and tolerability in 27 participants with heart failure with reduced or mildly reduced ejection fraction in the United States and Netherlands. NCT06558097 assessed safety, tolerability, and pharmacokinetics in 77 healthy participants in the United States.

Is XXB750 FDA approved?

XXB750 is not FDA approved. It is an investigational drug currently in Phase 1 clinical development. Completed trials have focused on safety, tolerability, and pharmacokinetics in heart failure patients and healthy volunteers. Further clinical studies would be needed to support any regulatory approval.