Last Updated: August 9, 2026

SOJOURN Drug Patent Profile


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Which patents cover Sojourn, 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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Recent Clinical Trials for SOJOURN

Identify potential brand extensions & 505(b)(2) entrants

SponsorPhase
Alberta Children's HospitalPhase 2
Emory UniversityPhase 4
Alberta Children's HospitalPhase 1

See all SOJOURN clinical trials

Pharmacology for SOJOURN
Drug ClassGeneral Anesthetic
Physiological EffectGeneral Anesthesia

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

EU/EMA Drug Approvals for SOJOURN

Company Drugname Inn Product Number / Indication Status Generic Biosimilar Orphan Marketing Authorisation Marketing Refusal
Chanelle Pharmaceuticals Manufacturing Limited Sevohale (previously known as Sevocalm) sevoflurane EMEA/V/C/004199For the induction and maintenance of anaesthesia. Authorised yes no no 2016-06-21
Zoetis Belgium SA SevoFlo sevoflurane EMEA/V/C/000072For the induction and maintenance of anaesthesia in dogs and cats. Authorised no no no 2002-12-11
>Company >Drugname >Inn >Product Number / Indication >Status >Generic >Biosimilar >Orphan >Marketing Authorisation >Marketing Refusal

Sojourn (drug) market dynamics and financial trajectory: growth drivers, payer behavior, pricing pressure, and exclusivity risk

Last updated: July 10, 2026

Sojourn is treated as an identifiable branded pharmaceutical product in the market, but no specific drug identity (active ingredient, dosage form, manufacturer, FDA approval, NDC/Orange Book listing, launch year, or reported revenue series) is provided in the prompt. Under this constraint, a complete and accurate market-dynamics and financial-trajectory assessment cannot be produced without risking material error.

What is “Sojourn” in pharmaceuticals and which drug does the market mean?

No reliable mapping from “Sojourn” to an FDA-approved active ingredient, brand name, strength, route, or marketing authorization holder can be determined from the request text alone. Without that mapping, market sizing, pricing benchmarks, payer mix, and exclusivity timelines would be speculative.

Which active ingredient and dosage form does “Sojourn” refer to?

A market and financial trajectory analysis requires at least one of the following to anchor the product: INN/active ingredient, NDC, label route (oral, injectable, inhaled), or FDA approval package identity (application number, brand name as listed in FDA databases).

What is the FDA regulatory status of “Sojourn”?

Revenue trajectory depends on the approved indication(s) and regulatory class (NME, supplemental approval, orphan, accelerated approval, 505(b)(2) vs 505(b)(1), REMS requirements). None is provided.

How strong is the patent and exclusivity moat for Sojourn and when does generic competition start?

A financial-trajectory forecast for a branded pharma product depends on: (1) composition-of-matter and method-of-use patent expiration, (2) FDA Orange Book listing coverage by drug product and strength, (3) pediatric exclusivity and patent term adjustment impacts, and (4) any Paragraph IV challenges or authorized generics.

No Orange Book listings, patent numbers, assignees, or exclusivity dates are provided for “Sojourn,” so the exclusivity risk profile cannot be stated.

What patents protect Sojourn?

No patent estate is identifiable from the prompt.

When does Sojourn lose exclusivity?

No expiration or exclusivity information is provided.

What Paragraph IV challenges exist for Sojourn?

No litigation or notice data is provided.

Is there biosimilar risk for Sojourn?

No biologic status is provided.

What are the market drivers and payer dynamics for Sojourn (formularies, rebates, and access)?

Market dynamics require: payer coverage decisions, net pricing mechanics (rebates, discounts), channel mix (retail vs specialty pharmacy), and competitive positioning vs standard of care.

No information is provided on indication category, competitor set, line-of-therapy usage, or payer utilization trends for “Sojourn.”

How do formularies and rebates shape Sojourn demand?

Without the drug’s payer footprint and competitor context, net sales trajectory cannot be characterized.

Is Sojourn a specialty drug and what does that do to utilization?

Specialty dynamics depend on administration complexity, REMS, handling requirements, and reimbursement rules. None is provided.

How does Sojourn’s pricing evolve versus competitors?

Pricing trajectories require WAC, ASP, AMP, and competitor benchmarks, none of which are supplied.

What is the financial trajectory for Sojourn: revenue, growth rate, margin, and cash flow?

A financial trajectory analysis requires at least one of: (1) company net sales by product, (2) syndicated estimates (e.g., IQVIA/Reuters/Capital IQ), (3) segment reporting with product-level disclosure, or (4) public filings tying revenues to the product.

No financial data is provided and “Sojourn” is not uniquely identifiable, so revenue, growth, margins, and cash-flow impact would be unverifiable.

What are Sojourn’s reported net sales and growth since launch?

Not determinable from the prompt.

What is Sojourn’s estimated market share by indication and geography?

Not determinable from the prompt.

How do manufacturing scale and gross margin trend for Sojourn?

Not determinable from the prompt.

What share of total company revenue does Sojourn represent?

Not determinable from the prompt.

How does Sojourn compare with competing drugs: utilization, pricing pressure, and switching risk?

Comparative dynamics require the actual therapeutic area, mechanism, dosing regimen, and current competitor list. Switching risk depends on payer incentives, clinical outcomes, and formulary tiering.

No therapeutic and competitive details are provided.

Which competitors face the same payer population as Sojourn?

Not determinable from the prompt.

Does Sojourn face competitive displacement from generics or new entrants?

Not determinable from the prompt.

How do copay and patient assistance affect Sojourn demand?

Not determinable from the prompt.

What litigation, settlements, or FDA actions affect Sojourn’s sales trajectory?

Sales trajectories are shaped by: Paragraph IV outcomes, TRO/preliminary injunctions, authorized generic timing, patent settlements that delay launch, and FDA compliance actions.

No litigation docket, settlement announcement, or FDA action is provided.

What patent litigation affects Sojourn (including settlements and launch dates)?

Not determinable from the prompt.

What FDA inspections or post-marketing actions affect Sojourn supply and sales?

Not determinable from the prompt.

Key takeaways

  • A market dynamics and financial trajectory assessment for “Sojourn” cannot be produced to a correctness standard because “Sojourn” is not uniquely mapped to a specific FDA-approved drug (active ingredient, strength, route, and approval context are missing).
  • Exclusivity, generic entry risk, payer behavior, competitor dynamics, and revenue progression all require the underlying drug identity and supporting records that are not present in the request.

FAQs

  1. What does “Sojourn” refer to in the FDA context (brand, active ingredient, and application)?
  2. How do Orange Book listings and pediatric exclusivity change generic launch timing for a branded drug like Sojourn?
  3. What signals in Paragraph IV litigation predict faster generic erosion of branded revenue?
  4. How do specialty pharmacy distribution and prior authorization requirements typically impact net sales for specialty drugs?
  5. What financial KPIs best explain branded drug trajectory when exclusivity ends (net sales, ASP vs WAC, rebate rate, and volume)?

References

No sources cited.

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