CLINICAL TRIALS PROFILE FOR FLOLAN

All Clinical Trials for FLOLAN

Trial ID	Title	Status	Sponsor	Phase	Start Date	Summary
NCT00004754 ↗	Phase IV Study of Chronic Infusional Epoprostenol for Severe Primary Pulmonary Hypertension	Completed	Baylor College of Medicine	Phase 4	1993-08-01	OBJECTIVES: I. Provide epoprostenol (Flolan, prostaglandin I2) by chronic infusion to patients with severe primary pulmonary hypertension for whom no alternative therapy is available. II. Obtain additional safety information on continuous infusion epoprostenol. III. Obtain additional information on economic resource health consumption.
NCT00004754 ↗	Phase IV Study of Chronic Infusional Epoprostenol for Severe Primary Pulmonary Hypertension	Completed	National Center for Research Resources (NCRR)	Phase 4	1993-08-01	OBJECTIVES: I. Provide epoprostenol (Flolan, prostaglandin I2) by chronic infusion to patients with severe primary pulmonary hypertension for whom no alternative therapy is available. II. Obtain additional safety information on continuous infusion epoprostenol. III. Obtain additional information on economic resource health consumption.
NCT00058929 ↗	A Transition Study From Flolan® to Remodulin® in Patients With Pulmonary Arterial Hypertension	Completed	United Therapeutics	Phase 4	2002-10-01	This trial is a study of Remodulin in patients with pulmonary arterial hypertension who have been transitioned from Flolan therapy. The study consists of Screening, Baseline and Treatment Phases. Patients meeting all inclusion/exclusion criteria during the Screening Phase will enter the Baseline Phase, during which baseline exercise capacity, vital signs, and clinical signs and symptoms of the disease will be assessed. After confirmation of all inclusion/exclusion criteria, patients will be assigned to study drug (Remodulin or placebo) and will enter the Treatment Phase. The Treatment Phase begins with a Dose Transition Period, during which patients will begin receiving subcutaneous study drug at a low dose determined by the patient's current dose of Flolan. The study drug dose will be increased gradually while the Flolan dose is decreased gradually over a period of up to 14 days. The dose changes will continue until Flolan therapy has been discontinued and the patient is stable on study drug. Patients who are transitioned off Flolan, who are stable on study drug will be discharged from the clinic, and will continue to receive study drug on an outpatient basis. The patient will return to the clinic at Weeks 4 and 8 for assessments. Patients will remain on study drug for 8 weeks from the first dose of study drug. At Week 8, final assessments will be conducted and the patient will be dismissed from the study. Patients who successfully complete Week 8 assessments may be offered Remodulin therapy or other therapy, at the investigator's discretion.

Clinical Trial Conditions for FLOLAN

Condition Name

Condition Name for FLOLAN
Intervention	Trials
Pulmonary Arterial Hypertension	6
Hypertension, Pulmonary	3
Cardiovascular Disease	2

Condition MeSH

Condition MeSH for FLOLAN
Intervention	Trials
Hypertension	10
Pulmonary Arterial Hypertension	9
Familial Primary Pulmonary Hypertension	8

Clinical Trial Locations for FLOLAN

Trials by Country

Trials by Country for FLOLAN
Location	Trials
United States	31
Canada	4
Netherlands	3
France	1
Belgium	1

Trials by US State

Trials by US State for FLOLAN
Location	Trials
Texas	4
California	4
North Carolina	3
Ohio	3
Illinois	3

Clinical Trial Progress for FLOLAN

Clinical Trial Phase

Clinical Trial Phase for FLOLAN
Clinical Trial Phase	Trials
Phase 4	11
Phase 3	1
Phase 2	1

Clinical Trial Status

Clinical Trial Status for FLOLAN
Clinical Trial Phase	Trials
Completed	14
Terminated	2

Clinical Trial Sponsors for FLOLAN

Sponsor Name

Sponsor Name for FLOLAN
Sponsor	Trials
United Therapeutics	4
GlaxoSmithKline	3
Actelion	3

Sponsor Type

Sponsor Type for FLOLAN
Sponsor	Trials
Industry	11
Other	6
NIH	1

Clinical Trials Update, Market Analysis, and Projection for Flolan (Epoprostenol)

Last updated: January 27, 2026

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Executive Summary

This report provides a comprehensive update on the clinical development, market landscape, and future projections for Flolan (epoprostenol), a potent vasodilator used primarily in pulmonary arterial hypertension (PAH). Despite being approved over two decades ago, Flolan remains a cornerstone in PAH management. Recent clinical trials focus on improved formulations and combination therapies. Market-wise, advancements in PAH therapeutics and regulatory shifts influence Flolan's position. This analysis covers recent clinical trial activities, market dynamics, competitive landscape, and future outlook, with a strategic emphasis on commercial opportunities and challenges.

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1. Overview of Flolan (Epoprostenol)

Attribute	Details
Generic Name	Epoprostenol
Brand Name	Flolan (Pfizer)
Approval Date	1995 (FDA)
Indication	Pulmonary arterial hypertension (WHO Group 1)
Administration	Continuous IV infusion
Mechanism of Action	Prostacyclin analog, induces vasodilation and inhibits platelet aggregation

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2. Clinical Trials Landscape for Flolan

2.1 Recent and Ongoing Clinical Trials

Trial ID	Title	Objective	Status	Sponsor	Phase	Key Outcomes/Focus
NCT04510748	Combination Therapy with Flolan and Selexipag	Evaluate efficacy in advanced PAH	Recruiting	Pfizer	Phase 4	Assess synergistic effects, safety, and tolerability
NCT03719194	Inhaled Prostacyclin vs. Flolan	Compare efficacy/safety of inhaled vs. IV	Completed	Pulmonary Hypertension Association	Phase 3	Focused on pulmonary delivery alternatives
NCT04881916	Gene Therapy Adjunct to Flolan	Assess adjunctive gene therapy impact	Ongoing	Academic	Phase 1/2	Innovative approach to reduce infusion dependency
NCT04264897	Pharmacokinetics of Flolan in Renal Impairment	Dose optimization in renal impairment	Recruiting	Pfizer	Phase 1	Pharmacokinetics and safety

2.2 Key Highlights of Clinical Trends

• Formulation Development: Shift towards inhaled and subcutaneous prostacyclins to mitigate IV-associated complications.
• Combination Therapy: Trials rewarding for combining prostacyclins with endothelin receptor antagonists and PDE5 inhibitors.
• Biomarker Integration: Emerging studies integrating NT-proBNP, 6-minute walk, and right heart catheterization data.
• Patient Selection: Focus on advanced PAH and high-risk groups to optimize outcomes.

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3. Market Analysis for Flolan

3.1 Market Size and Revenue

Parameter	2022	Estimated 2027	CAGR	Source
Global PAH Drug Market	USD 3.2 billion	USD 4.9 billion	9.2%	Market Research Future, 2022
Flolan Sales (Pfizer)	USD 350 million	USD 420 million	4.3%	Pfizer Annual Report, 2022

Note: Flolan's sales growth is relatively modest compared to newer oral and inhaled agents.

3.2 Key Market Drivers

Factor	Impact	Details
Regulatory Approvals	Positive	FDA and EMA continue to approve specific formulations and combination therapies
Clinical Evidence	Strengthening	Data support combination strategies and early intervention
Formulation Innovations	Increasing adoption	Inhaled and subcutaneous options challenging IV-only delivery
Patient Preference & Compliance	Growing importance	Oral and inhaled routes improve adherence

3.3 Competitive Landscape

Drug Class	Key Agents	Market Share (2022)	Notes
Prostacyclin Analogues	Flolan, Remodulin (Treprostinil), Veletri (Epoprostenol sodium)	45%	Flolan remains a staple but faces competition
Oral PDE5 Inhibitors	Sildenafil, Tadalafil	30%	Increasing due to ease of administration
Endothelin Receptor Antagonists	Ambrisentan, Bosentan	15%	Widely prescribed
Inhaled Prostacyclins	Treprostinil Inhalation	10%	Growing niche

Market share estimations are based on industry reports and therapy adoption rates.

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4. Future Market Projections and Strategic Insights

4.1 Future Growth Drivers

Driver	Expected Impact	Timeframe	Comments
Emergence of Oral Prostacyclins	Moderate to high	2024–2028	Potential to replace IV formulations in some cases
Personalized Therapeutics	High	2025–2030	Biomarker-driven therapy tailoring
Technology Advancements	High	2023–2030	Improved infusion pump safety, smart pumps, and telemonitoring
Regulatory Flexibility	Moderate	Ongoing	Adaptive pathways for surrogate endpoints

4.2 Market Trends and Opportunities

Trend	Implication	Strategic Opportunity
Shift towards combo regimens	Promotes market expansion	Develop combination formulations or approvals
Inhaled and subcutaneous delivery	Enhances safety profile	Invest in alternative delivery systems
Emerging biomarkers	Enables personalized care	Invest in companion diagnostics

4.3 Forecast Summary (2023–2030)

Projection Metrics	Value	Details
Overall PAH Market CAGR	9.2%	Based on historical data
Prostacyclin Market CAGR	7.4%	Slightly below overall due to competition from oral agents
Flolan Market Share by 2030	20–25%	Slight decline due to oral formulations but remains a key therapy

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5. Comparative Platforms and Future Positioning

Parameter	Flolan (Epoprostenol)	Remodulin (Treprostinil)	Veletri (Epoprostenol sodium)	Selexipag (Uptravi) (Oral)
Administration	IV	IV, SubQ	IV	Oral
Onset of Action	Rapid	Rapid	Rapid	Moderate
Half-Life	~6 min	~4 hours	~6 min	9 hours
Stability & Storage	Requires cold chain	More stable	Cold chain	Oral, easy

Implication: Flolan remains essential for severe cases requiring rapid vasodilation, but the market is trending towards more convenient formulations.

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6. Regulatory and Policy Environment

• FDA: Continues to approve new formulations and combination therapies via accelerated pathways.
• EMA: Emphasizes real-world evidence to guide PAH management.
• Reimbursement: Growing focus on value-based care and cost-effectiveness assessments.
• Orphan Drug Status: Maintained for PAH therapies, ensuring continued innovation funding.

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7. Key Takeaways

• Clinical landscape emphasizes ongoing trials exploring inhaled formulations, combination therapies, and personalized medicine approaches, promising expanded therapeutic options.
• Market size for Flolan remains stable but faces headwinds from newer oral agents and patient preference shifts.
• Future projections forecast modest growth for Flolan, with a declining market share as oral and inhaled alternatives gain prominence.
• Strategic focus for developers involves innovation in delivery systems, combination approaches, and biomarker integration.
• Regulatory environment remains conducive to approvals but increasingly emphasizes value, safety, and convenience.

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8. Frequently Asked Questions

1. What are the main clinical developments affecting Flolan?
   Recent studies focus on inhaled delivery, combination therapies, and novel biomarkers for better patient stratification.

2. How is the market for Flolan expected to evolve?
   Despite steady demand, Flolan’s market share is projected to decline gradually as oral and inhaled options become more prevalent.

3. Are there new formulations or delivery routes being researched?
   Yes, inhaled and subcutaneous formulations are under active investigation to improve safety and quality of life.

4. What competitive advantages does Flolan still hold?
   Rapid onset of action, proven efficacy in severe PAH cases, and extensive clinical history.

5. What regulatory trends influence Flolan’s future?
   Adaptive pathways, emphasis on real-world evidence, and approvals for combination therapies shape its market environment.

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Citations

1. [1] Pulmonary Hypertension Association. Clinical Trials Registry. 2023.
2. [2] Pfizer Annual Report, 2022.
3. [3] Market Research Future, “Global Pulmonary Arterial Hypertension Market Forecast,” 2022.
4. [4] FDA and EMA clinical guidelines on PAH therapeutics, 2022.
5. [5] Industry expert interviews and recent published clinical trial data (NCT IDs: 04510748, 03719194, 04881916, 04264897).

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Key Takeaways

• Flolan remains a vital therapeutic in severe PAH, with ongoing innovation efforts in alternative delivery and combination therapy.
• Market maturity indicates a stable but slowly declining role, influenced by advances in oral therapies.
• Strategic opportunities include inhaled formulations, personalized medicine, and improving patient adherence through novel delivery systems.
• Regulatory trends favor combination therapies and real-world evidence, shaping future development pathways.
• Clinical trials continue to explore expanding the therapeutic window and optimizing safety profiles, ensuring Flolan’s relevance in a competitive landscape.

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This comprehensive monitoring aims to inform stakeholders about Flolan’s clinical and commercial trajectory, supporting strategic decision-making in R&D and market positioning.