Last Updated: August 10, 2026

SULSOXIN Drug Patent Profile


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

Sulsoxin is a drug marketed by Solvay and is included in one NDA.

The generic ingredient in SULSOXIN is sulfisoxazole. There are three drug master file entries for this compound. Additional details are available on the sulfisoxazole profile page.

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Summary for SULSOXIN
US Patents:0
Applicants:1
NDAs:1
Raw Ingredient (Bulk) Api Vendors: 109
Patent Applications: 4,609
DailyMed Link:SULSOXIN at DailyMed

US Patents and Regulatory Information for SULSOXIN

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Solvay SULSOXIN sulfisoxazole TABLET;ORAL 080040-001 Approved Prior to Jan 1, 1982 DISCN 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

SULSOXIN market dynamics and financial trajectory: exclusivity, competitive pressure, and revenue risk map

Last updated: July 23, 2026

SULSOXIN’s market path is not computable from the current record. The dataset provided does not include (1) the FDA/EMA commercial status (approved indications, reference product/strengths), (2) the Orange Book or similar exclusivity baseline (NCE status, listed patents, patent terms, 5-year/7-year exclusivity, pediatric exclusivity), (3) launch timing or sales history by quarter, or (4) identified branded and generic/biosimilar competitors. Without those inputs, no accurate financial trajectory, revenue exposure, or litigation/entry-risk assessment can be produced.

Market trajectory and revenue outlook for SULSOXIN: what do sales, channel, and pricing dynamics imply?
No data available to anchor a revenue curve. A credible trajectory requires confirmed market facts (launch date, net price or ASP path, payer mix, discounting, and utilization by indication) and at least one time series (quarterly sales or prescription share).

What financial drivers are determinative for SULSOXIN?

  • Net price trajectory (WAC to net, PBM contracting outcomes, 340B effects if applicable)
  • Reimbursement status by payer segment (commercial, Medicaid, Medicare Part D or managed Medicaid)
  • Utilization growth (incidence, line-of-therapy share, adherence, step edits)
  • Competitive substitution (therapeutic class, within-class generics, and patient access barriers)
  • Manufacturing supply stability (capacity and lead times impacting fill rates)

What typically triggers revenue step changes?

  • Formulary decisions and prior authorization tightening or easing
  • Indication expansion or label narrowing
  • Generic/biologic competition start dates
  • Patent litigation outcomes and settlement-based launch carveouts

What is SULSOXIN’s patent estate and exclusivity schedule (Orange Book) that shapes its revenue curve?
No patent or exclusivity schedule is available in the provided record. An exclusivity and patent-term table is required to translate market dynamics into entry-risk windows.

Which exclusivity and patent buckets must be mapped?

  • NDA exclusivities: NCE (5 years), new clinical investigations (3 years), method-of-use (if applicable), pediatric (additional 6 months)
  • Listed Orange Book patents: drug substance, drug product, and method-of-use
  • Timing offsets: 30-month stay for Paragraph IV filings, patent expiry adjacency, and any terminal disclaimers

Patent expiration and entry timing impact on net sales

A revenue trajectory cannot be built without:

  • First commercial date
  • Patent expiry dates for each listed family
  • Any active Paragraph IV cases and their expected resolution dates

When does SULSOXIN lose exclusivity and face Paragraph IV generic entry risk?
No exclusivity-loss timeline or Paragraph IV docket information is available. Generic entry risk depends on:

  • Remaining patent term by claim scope (composition vs formulation vs method)
  • Whether the product is protected by enforceable Orange Book patents at the time of ANDA approval
  • Court outcome in any active litigation and whether settlements include “carve-out” dates

Entry-risk scenarios that must be quantified

  • Full launch at approval date vs “design-around” vs settlement delay
  • “At-risk” launch by first ANDA filer and probability of injunction or damages
  • Loss of market access from payer switches and copay re-optimization

Which companies are competing with SULSOXIN, and how does the competitive landscape change pricing power?
No competitors or transaction history is provided. A competitive landscape requires:

  • Therapeutic class peers and their market shares
  • Generic presence in the class (molecule-level and label-level)
  • Any biosimilar competition if SULSOXIN is biologic
  • Presence of authorized generics or distribution arrangements

Competitive dynamics that typically compress revenue

  • Formulary tier migration (preferred to non-preferred)
  • Mandatory step therapy or prior authorization
  • PBM rebates and contracting that drive net price down ahead of generic entry

What SULSOXIN formulations and method-of-use patents are protected, and how do they affect generic design-arounds?
No formulation or method-of-use patent listings are available. Generic design-around depends on which patent types remain enforceable:

  • Composition-of-matter claims (hardest to design around)
  • Specific polymorph/crystal form or salt claims (medium barrier)
  • Formulation claims (excipient/process windows, release profiles)
  • Method-of-use claims tied to dosing regimen or patient subgroup

What to map in each protected domain

  • Dosage forms and strengths at launch and label expansion
  • Claimed ranges: excipient levels, particle size, dissolution profile, or manufacturing parameters
  • Method-of-use specifics: patient selection criteria, dosing schedule, endpoints

What patent litigation and settlements affect SULSOXIN generic or biosimilar timing?
No litigation docket or settlement terms are present in the current record. Litigation changes financial trajectory by:

  • Shifting effective entry dates from statutory expiry
  • Creating engineered “carve-out” periods for settlement products
  • Influencing probability-weighted “at-risk” launches

Litigation data required to model financial impact

  • Case captions, courts, and filing dates
  • Asserted patents and whether claims were invalidated/triggered injunctions
  • Settlement dates and launch calendars

What is the FDA status of SULSOXIN (approval date, pathway, label scope), and how does it drive commercialization outcomes?
No FDA regulatory details are provided. FDA pathway and label scope determine:

  • Patient population size and early uptake
  • Speed and breadth of payer coverage
  • Risk-adjusted future revenue from line extensions

Regulatory facts that must be known to project sales

  • Approval date and initial indication
  • Expedited designations (if any), trial endpoints, and any postmarketing commitments
  • Pediatric study plan outcomes (if any) impacting timeline
  • REMS requirements (if any) affecting access

How does SULSOXIN compare with similar drugs in its class on time-to-revenue and market share durability?
No class anchor peers or utilization data is provided. Comparison requires:

  • Comparable products with similar mechanisms and dosing convenience
  • Their sales adoption curves
  • Their patent cliffs and generic entry aftermath

Benchmarks that usually predict durability

  • Net price at peak and rate of decline
  • Prescription share retention pre- and post-competition
  • Share of prescriptions in commercially insured vs Medicare Part D

Key Takeaways

  • A defensible market dynamics and financial trajectory for SULSOXIN cannot be produced from the supplied record because there is no FDA status, exclusivity/patent timeline, competition map, or sales/market share dataset.
  • Revenue risk modeling requires an exclusivity-and-patent calendar (Orange Book), plus verified competitor and litigation entry dates. These inputs are not available here.

FAQs

  1. What does SULSOXIN’s Orange Book listing show about its current exclusivity wall?
  2. Is SULSOXIN protected by composition-of-matter, formulation, or method-of-use patents?
  3. How many generic ANDA Paragraph IV challenges exist for SULSOXIN and what patents did they target?
  4. What entry timeline would likely apply to SULSOXIN after patent expiry, including 30-month stays and settlement carve-outs?
  5. How would a payer formulary downgrade before first generic entry typically affect SULSOXIN net revenue?

References

No sources were provided in the prompt record, and no verifiable citations can be compiled without drug-specific FDA, Orange Book, patent, litigation, or sales datasets.

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