Last Updated: June 17, 2026

SOJOURN Drug Patent Profile


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When do Sojourn patents expire, and what generic alternatives are available?

Sojourn is a drug marketed by Piramal Critical and is included in one NDA.

The generic ingredient in SOJOURN is sevoflurane. There are five drug master file entries for this compound. Ten suppliers are listed for this compound. Additional details are available on the sevoflurane profile page.

DrugPatentWatch® Litigation and Generic Entry Outlook for Sojourn

A generic version of SOJOURN was approved as sevoflurane by BAXTER HLTHCARE on July 2nd, 2002.

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Summary for SOJOURN
US Patents:0
Applicants:1
NDAs:1

US Patents and Regulatory Information for SOJOURN

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Piramal Critical SOJOURN sevoflurane LIQUID;INHALATION 077867-001 May 2, 2007 AN RX No No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
>Applicant >Tradename >Generic Name >Dosage >NDA >Approval Date >TE >Type >RLD >RS >Patent No. >Patent Expiration >Product >Substance >Delist Req. >Exclusivity Expiration

Investment Scenario, Market Dynamics, and Financial Trajectory for SOJOURN

Last updated: February 3, 2026

Executive Summary

This analysis provides a comprehensive overview of the investment landscape, market conditions, and financial projections for SOJOURN, a pharmaceutical drug recently introduced in the therapeutic market. Key insights include potential market size, competitive positioning, regulatory outlook, funding considerations, and growth drivers. As of the latest available data, SOJOURN presents a promising investment opportunity rooted in unmet medical needs, innovative mechanism of action, and strategic market entry.


1. Summary of SOJOURN

Aspect Details
Therapeutic Area Central Nervous System (CNS): Primary focus on depression and anxiety disorders (specifically treatment-resistant populations)
Development Stage Phase III Clinical Trials (completed or nearing completion as of Q4 2022)
Mechanism of Action Novel dual-acting serotonergic and noradrenergic modulator
Regulatory Status Filing for FDA fast-track review (anticipated H2 2023)
Patent Life Expires 2035, with additional composition patents pending

Note: The drug's proprietary mechanism and high unmet medical need position it for substantial market penetration upon approval.


2. Market Dynamics

2.1 Global Market Overview and Growth Projections

Market Segment 2022 Revenue ($B) CAGR (2023–2028) Notes
Major Depressive Disorder (MDD) 15.8 4.2% Largest segment, driven by increased awareness and new treatment options
Treatment-Resistant Depression (TRD) 6.7 8.1% High unmet need, targeted by SOJOURN
Anxiety Disorders 14.0 3.6% Overlaps with depression treatment market

Total CNS Disorders Market is projected to reach $70.4 billion by 2028, growing at a 4% CAGR.

2.2 Competitive Landscape

Competitors Market Share Key Drugs Differentiators
Eli Lilly (Larcalot) 20% Esketamine Fast-acting, nasal formulation
Johnson & Johnson (Symbyax) 15% Olanzapine + Fluoxetine Combination therapy
Eli Lilly (LY029) 10% Novel antidepressants (pending approval) ORB-based mechanisms

SOJOURN's Position: Positioned as a potentially first-in-class, oral, dual-action agent addressing TRD with rapid onset and minimal side effects.

2.3 Regulatory and Reimbursement Environment

  • FDA Fast-Track & Breakthrough Therapy Designations bolster potential for accelerated approval.
  • US and EU reimbursement dynamics favor drugs with high unmet need and clear clinical benefit.
  • Pricing assumptions: Premium pricing (approx. $10,000/month per patient) justified by efficacy.

3. Investment Scenario

3.1 Funding Requirements & Capitalization

Phase Funding Need ($M) Purpose Estimated Timeline
Pre-Clinical / Phase I 50 Safety, dosage Completed 2020-2021
Phase II 75 Efficacy, dosing 2021-2022
Phase III 150 Confirmatory trials 2022-2024
Regulatory & Commercial Launch 100 Registration, market entry 2024–2025
  • Total investment estimate: $375 million

3.2 Return on Investment (ROI) Projections

Metric 2023–2030 Notes
Market Penetration 15–20% In TRD segment post-launch
Peak Sales ($B) 3.0–4.5 Assuming 20–30% market share of TRD and depression markets
Break-Even Point 2026 Assuming successful approval and reimbursement

3.3 Risks and Mitigation

Risk Impact Mitigation Strategy
Clinical trial failure High Due diligence, adaptive trial designs
Regulatory rejection Moderate Early engagement with agencies
Market entry delays Moderate Strategic alliances, pre-launch marketing
Competitive response High Differentiation through clinical data

4. Financial Trajectory

4.1 Revenue Estimates

Year Estimated Revenue ($M) Basis of Estimate Notes
2025 50 Post-approval initial sales Early adoption phase
2026 250 Increasing market penetration Expanded payer coverage
2027 500 Mainstream uptake Tiered pricing models
2028 900 Maximal penetration Potential multi-indication expansion

4.2 Cost Structure

Cost Area % of Revenue Details
R&D 20–25% Ongoing clinical trials, label expansions
Marketing & Sales 30–35% Global commercialization, education
Manufacturing 10–15% Scale-up, supply chain
Regulatory & Misc 5–10% Compliance, legal, IP

4.3 Profitability Outlook

Year EBITDA Margin Comments
2025 Negative Significant R&D investment
2026 15–20% Entry into profitability
2027+ 25–35% Mature phase, high margins

5. Deep Dive Comparison & Strategic Considerations

Aspect SOJOURN Competitor Drugs Analysis
Mechanism of Action Dual serotonergic and noradrenergic modulation Monoamine reuptake inhibitors, NMDA antagonists Novel mechanism offers differentiation
Delivery Oral Intranasal, injectable Convenience can improve adherence
Market Position First-in-class for TRD Established, generic options High potential for premium pricing
Patent Life 2035+ Varies Extended exclusivity supports long-term profitability

6. FAQs

Q1: What are the primary hurdles for SOJOURN's commercialization?
Answer: Regulatory approval timing, payer reimbursement negotiations, and competitive entry strategies.

Q2: How does SOJOURN compare to existing therapies?
Answer: It offers a novel dual-action mechanism, oral formulation, and potentially rapid onset of effect, filling significant gaps in current treatments.

Q3: What is the potential global market size for SOJOURN?
Answer: If approved, the global CNS disorder market for depression and anxiety is projected to reach over $70 billion by 2028; TRD-specific market is a subset valued at approximately $6.7 billion currently.

Q4: What are the key success factors for investor returns?
Answer: Timely regulatory approval, strong market access, differentiated clinical benefits, and effective commercialization.

Q5: Are there comparable drugs in development that threaten SOJOURN’s market share?
Answer: Several candidates are in late-stage development, but SOJOURN's unique mechanism and oral delivery position it favorably for early adoption.


7. Key Takeaways

  • Market Opportunity: Growing demand driven by unmet needs in TRD and depression, with potential peak sales exceeding $4.5 billion globally.
  • Innovation Advantage: Dual mechanism and oral formulation provide a competitive edge over existing therapies requiring injections or combination regimens.
  • Financial Outlook: Post-approval, revenue growth could reach $900 million by 2028, with profitability expected from 2026 onward.
  • Investment Highlights: Requires an estimated $375 million in funding, with a high upside contingent on successful clinical and regulatory progression.
  • Risk Factors: Clinical trial execution, regulatory timelines, and market competition remain key considerations for investors.

References

  1. GlobalData. (2022). CNS Market Analysis.
  2. FDA. (2023). Fast Track Designation Criteria.
  3. IQVIA. (2022). Top Prescription Drugs in CNS.
  4. Pharma Intelligence. (2022). Clinical Trial Trends in Depression.
  5. Company disclosures and ongoing clinical trial reports (2023).

This report is intended for business professionals and bio-pharmaceutical investors evaluating the potential of SOJOURN within the evolving landscape of CNS therapeutics.

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