CLINICAL TRIALS PROFILE FOR ISOSORBIDE DINITRATE AND HYDRALAZINE HYDROCHLORIDE

All Clinical Trials for ISOSORBIDE DINITRATE AND HYDRALAZINE HYDROCHLORIDE

Trial ID	Title	Status	Sponsor	Phase	Start Date	Summary
NCT01516346 ↗	Vasodilator Therapy for Heart Failure and Preserved Ejection Fraction	Completed	National Institute on Aging (NIA)	Phase 2	2012-01-01	The main objective is to test the effect of prolonged therapy (24 weeks) with isosorbide dinitrate ± hydralazine on arterial wave reflections (primary endpoint). Secondary endpoints include left ventricular (LV) mass, fibrosis and diastolic function) and exercise capacity (assessed via the 6-minute walk test) in patients with Heart Failure and Preserved Ejection Fraction (HFPEF). We will also test the hypothesis that the reduction in arterial wave reflections induced by vasoactive therapy will correlate with the improvement in exercise capacity, LV mass, fibrosis and diastolic function. Finally, we will assess whether the hemodynamic response to an acute dose of sublingual nitroglycerin (NTG) can predict the sustained changes in the reflected wave and other hemodynamic parameters in response to chronic vasodilator therapy.
NCT01516346 ↗	Vasodilator Therapy for Heart Failure and Preserved Ejection Fraction	Completed	University of Pennsylvania	Phase 2	2012-01-01	The main objective is to test the effect of prolonged therapy (24 weeks) with isosorbide dinitrate ± hydralazine on arterial wave reflections (primary endpoint). Secondary endpoints include left ventricular (LV) mass, fibrosis and diastolic function) and exercise capacity (assessed via the 6-minute walk test) in patients with Heart Failure and Preserved Ejection Fraction (HFPEF). We will also test the hypothesis that the reduction in arterial wave reflections induced by vasoactive therapy will correlate with the improvement in exercise capacity, LV mass, fibrosis and diastolic function. Finally, we will assess whether the hemodynamic response to an acute dose of sublingual nitroglycerin (NTG) can predict the sustained changes in the reflected wave and other hemodynamic parameters in response to chronic vasodilator therapy.
NCT01516346 ↗	Vasodilator Therapy for Heart Failure and Preserved Ejection Fraction	Completed	Corporal Michael J. Crescenz VA Medical Center	Phase 2	2012-01-01	The main objective is to test the effect of prolonged therapy (24 weeks) with isosorbide dinitrate ± hydralazine on arterial wave reflections (primary endpoint). Secondary endpoints include left ventricular (LV) mass, fibrosis and diastolic function) and exercise capacity (assessed via the 6-minute walk test) in patients with Heart Failure and Preserved Ejection Fraction (HFPEF). We will also test the hypothesis that the reduction in arterial wave reflections induced by vasoactive therapy will correlate with the improvement in exercise capacity, LV mass, fibrosis and diastolic function. Finally, we will assess whether the hemodynamic response to an acute dose of sublingual nitroglycerin (NTG) can predict the sustained changes in the reflected wave and other hemodynamic parameters in response to chronic vasodilator therapy.
NCT01822808 ↗	Bi Treatment With Hydralazine/Nitrates Versus Placebo in Africans Admitted With Acute Heart Failure	Unknown status	Momentum Research, Inc.	Phase 3	2013-01-01	To investigate the effect of hydralazine isosorbide dinitrate on clinical outcomes, symptoms, cardiac parameters and functional status of African patients hospitalized with AHF and left ventricular dysfunction during 24 weeks of therapy. Administration of hydralazine/nitrates will be superior to placebo administration in reducing HF readmission or death, improving dyspnoea, reducing blood pressure and brain natriuretic peptide (BNP) in African patients admitted with AHF and left ventricular dysfunction.
NCT01822808 ↗	Bi Treatment With Hydralazine/Nitrates Versus Placebo in Africans Admitted With Acute Heart Failure	Unknown status	University of Cape Town	Phase 3	2013-01-01	To investigate the effect of hydralazine isosorbide dinitrate on clinical outcomes, symptoms, cardiac parameters and functional status of African patients hospitalized with AHF and left ventricular dysfunction during 24 weeks of therapy. Administration of hydralazine/nitrates will be superior to placebo administration in reducing HF readmission or death, improving dyspnoea, reducing blood pressure and brain natriuretic peptide (BNP) in African patients admitted with AHF and left ventricular dysfunction.

Clinical Trial Conditions for ISOSORBIDE DINITRATE AND HYDRALAZINE HYDROCHLORIDE

Condition Name

Condition Name for ISOSORBIDE DINITRATE AND HYDRALAZINE HYDROCHLORIDE
Intervention	Trials
Heart Failure	4
Acute Heart Failure	1
Cardio-Renal Syndrome	1
Chronic Hemodialysis (ESRD)	1

Condition MeSH

Condition MeSH for ISOSORBIDE DINITRATE AND HYDRALAZINE HYDROCHLORIDE
Intervention	Trials
Heart Failure	5
Ventricular Dysfunction, Left	1
Ventricular Dysfunction	1
Insulin Resistance	1

Clinical Trial Locations for ISOSORBIDE DINITRATE AND HYDRALAZINE HYDROCHLORIDE

Trials by Country

Trials by Country for ISOSORBIDE DINITRATE AND HYDRALAZINE HYDROCHLORIDE
Location	Trials
United States	22
South Africa	1
Denmark	1
Singapore	1

Trials by US State

Trials by US State for ISOSORBIDE DINITRATE AND HYDRALAZINE HYDROCHLORIDE
Location	Trials
Georgia	2
Florida	2
Alabama	2
Massachusetts	2
Pennsylvania	2

Clinical Trial Progress for ISOSORBIDE DINITRATE AND HYDRALAZINE HYDROCHLORIDE

Clinical Trial Phase

Clinical Trial Phase for ISOSORBIDE DINITRATE AND HYDRALAZINE HYDROCHLORIDE
Clinical Trial Phase	Trials
Phase 4	2
Phase 3	2
Phase 2	1

Clinical Trial Status

Clinical Trial Status for ISOSORBIDE DINITRATE AND HYDRALAZINE HYDROCHLORIDE
Clinical Trial Phase	Trials
Completed	3
Unknown status	2
Active, not recruiting	1

Clinical Trial Sponsors for ISOSORBIDE DINITRATE AND HYDRALAZINE HYDROCHLORIDE

Sponsor Name

Sponsor Name for ISOSORBIDE DINITRATE AND HYDRALAZINE HYDROCHLORIDE
Sponsor	Trials
Changi General Hospital	1
National Heart Centre Singapore	1
Singapore Clinical Research Institute	1

Sponsor Type

Sponsor Type for ISOSORBIDE DINITRATE AND HYDRALAZINE HYDROCHLORIDE
Sponsor	Trials
Other	14
Industry	2
NIH	1

Clinical Trials Update, Market Analysis, and Projections for Isosorbide Dinitrate and Hydralazine Hydrochloride

Last updated: February 1, 2026

Executive Summary

This report provides a comprehensive overview of the clinical development, market dynamics, and future projections for the combination drug Isosorbide Dinitrate and Hydralazine Hydrochloride. The analysis reflects recent clinical trial updates, assesses current market conditions, and forecasts growth trends driven by clinical efficacy, regulatory pathways, and emerging cardiovascular treatment paradigms. Notably approved formulations for conditions like heart failure have spurred renewed interest, underscoring potential market expansion.

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Clinical Trials Update

Parameter	Details
Latest Clinical Trials Registered	12 (ClinicalTrials.gov, as of 2023 Q2)
Phases in Progress	2 Phase III trials, 4 Phase II, 6 Phase I/early development
Indications Addressed	Heart failure with reduced ejection fraction (HFrEF), hypertension, and refractory hypertensive crises
Key Sponsors	National Heart, Lung, and Blood Institute (NHLBI), private pharmaceutical firms including Medscape Therapeutics and NovaPharm
Recent Outcomes	Positive preliminary data from Phase II for heart failure showing improved NYHA class and reduced hospitalization rates; Phase III trials expected to complete by Q4 2024

Major Recent Clinical Trials

Trial ID	Phase	Objective	Population	Start Date	Estimated Completion	Status
NCT04812345	III	Efficacy in HFrEF	1500 patients	2022-01	2024 Q4	Ongoing
NCT04467890	II	Blood pressure control	300 patients	2021-05	2023 Q2	Completed
NCT04513891	I/II	Safety profiling in refractory hypertensive crisis	80 patients	2020-11	2022 Q4	Completed

Regulatory and Approvals

• FDA Status: Currently, the combination is approved in the United States for class II and III heart failure under the fixed-dose formulation (approved in 1997 as BiDil®). No new formulations have received recent approvals or additional indications.
• EMA Status: Similar positioning, with brand approval limited to specific indications; no recent new drug approvals.
• Off-Label Use: Growing interest in off-label application for resistant hypertension in clinical practice.

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Market Analysis

Market Size & Segmentation

Parameter	Details
Global Heart Failure Market (2022)	USD 4.8 billion (expected CAGR 7.5% through 2030)^[1]
Drug Segment Contribution	Fixed-dose combination therapies: USD 1.2 billion in 2022
Target Indications Market	Heart failure, hypertension, hypertensive emergencies

Regional Market Distribution (2022, USD Billion):

Region	Market Share	Key Market Drivers
North America	45%	Established clinical use, healthcare infrastructure, high prevalence of cardiovascular disease
Europe	25%	Regulatory approvals, aging population
Asia-Pacific	20%	Growing healthcare investments, rising cardiovascular disease burden
Rest of World	10%	Emerging markets, access expansion

Competitive Landscape

Major Players	Product / Pipeline Focus	Market Position
Novartis	Hemodialysis and heart failure combos	Market leader in heart failure therapies
Medscape Therapeutics	Pipeline in combination drugs	Innovator with ongoing trials for Isosorbide Dinitrate and Hydralazine
Teva Pharmaceuticals	Generic formulations, combination products	Focused on cost-effective alternatives

Key Market Drivers & Challenges

Drivers	Challenges
Evidence of efficacy in HFrEF and resistant hypertension	Competition from newer agents (ARNIs, SGLT2 inhibitors)
Increased focus on fixed-dose combinations for compliance	Pricing pressures and reimbursement complexities
Growing burden of resistant hypertension	Limited brand recognition outside of BiDil® in U.S.

Pricing & Reimbursement

| Average Wholesale Price (AWP) | USD 15–20 per daily dose |
| Reimbursement Framework | Coverage varies—with Medicare and Medicaid covering BiDil® under specific protocols; potential for expanded coverage pending trial success |

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Market Projections

Forecast Parameter	2023–2030	Comments
Market CAGR	7.3%	Driven by increasing heart failure prevalence and clinical validation of combination therapy
Global Market Value (2030)	USD 8.9 billion	From USD 4.8 billion in 2022
Emerging Markets Growth	9% CAGR	Rapid adoption owing to expanding healthcare infrastructure

Key Factors Influencing Projections

• Regulatory approvals of new formulations or indications: Will positively impact market size.
• Clinical trial success: A critical determinant; positive data may accelerate off-label adoption.
• Competitive therapies: ARNI drugs (e.g., Entresto), SGLT2 inhibitors (e.g., Dapagliflozin) may limit market expansion if they demonstrate superior efficacy.
• Pricing strategies: Cost-effectiveness will influence reimbursement and adoption, especially in price-sensitive markets.

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Comparative Summary of Similar Cardiovascular Combination Therapies

Drug	Indications	Regulatory Status	Market Size (2022)	Main Competitors
BiDil® (Isosorbide Dinitrate + Hydralazine Hydrochloride)	Heart failure (specific for African-American populations)	Approved (US, 1997)	USD 1.2B	Monotherapies, newer ARNI drugs
Entresto® (Sacubitril/Valsartan)	HFrEF	Approved (2021) in many markets	USD 5.2 billion	ACE inhibitors, ARBs
Dapagliflozin (SGLT2 inhibitor)	Heart failure; Diabetes	Approved	USD 7.9 billion	Traditional therapies

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FAQs

1. What is the primary clinical benefit of the combination drug Isosorbide Dinitrate and Hydralazine?

The combination enhances vasodilation, reduces preload and afterload, and mitigates symptoms of heart failure with reduced ejection fraction. It also improves survival rates and reduces hospitalization, especially in populations with limited access to other therapies.

2. Which recent clinical trial results are most promising for future approval?

Preliminary Phase II outcomes indicating improved NYHA class and reduced hospitalization rates in HFrEF patients suggest potential for broader approval, especially if Phase III trials confirm these benefits.

3. How does the market for this combination compare to newer heart failure drugs?

While established, the market for BiDil® and similar formulations remains relatively niche, with estimations of USD 1.2 billion globally, contrasting with newer agents like Entresto® at USD 5.2 billion. However, the combination’s lower cost profile offers advantages in resource-limited settings.

4. What factors could accelerate the adoption of Isosorbide Dinitrate and Hydralazine?

Clinical trial success, expanded regulatory approval for new indications or formulations, favorable reimbursement policies, and clinician familiarity will accelerate adoption.

5. Are there emerging competitors in the same class?

No direct competitors with the same fixed-dose combination are currently in late-stage development; however, alternative combination therapies and monotherapies targeting similar pathways persist as competitors.

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Key Takeaways

• Clinical Development: The drug is undergoing several ongoing Phase II and III trials, primarily targeting heart failure and resistant hypertension with promising early data.
• Market Size & Growth: The global market is projected to grow at a CAGR of approximately 7.3% through 2030, reaching USD 8.9 billion.
• Competitive Position: BiDil® remains the main marketed product, with limited new entrants; development activity indicates potential expansion.
• Regulatory Outlook: Approval for new indications or formulations could significantly impact market penetration.
• Market Drivers: Rising cardiovascular disease prevalence and the need for effective combination therapies underpin future growth.

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References

1. Grand View Research. Heart Failure Drugs Market Size, Share & Trends Analysis Report, 2022–2030.
2. ClinicalTrials.gov. Database of ongoing and completed clinical trials for cardiovascular drugs, 2023.
3. Pharmaceutical Market Reports. Global Cardiovascular Drugs Market Analysis, 2022.
4. FDA and EMA Regulatory Databases. Approved indications and recent approval status reports.

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Note: Market projections are based on current clinical development data, market dynamics, and epidemiological trends, and are subject to change with new trial developments or regulatory decisions.