Last Updated: September 29, 2026

DIPHENYLAN SODIUM Drug Patent Profile


✉ Email this page to a colleague

« Back to Dashboard


When do Diphenylan Sodium patents expire, and when can generic versions of Diphenylan Sodium launch?

Diphenylan Sodium is a drug marketed by Chartwell Molecular and is included in one NDA.

The generic ingredient in DIPHENYLAN SODIUM is phenytoin sodium. There is one drug master file entry for this compound. Twenty-four suppliers are listed for this compound. Additional details are available on the phenytoin sodium profile page.

DrugPatentWatch® Litigation and Generic Entry Outlook for Diphenylan Sodium

A generic version of DIPHENYLAN SODIUM was approved as phenytoin sodium by HIKMA on December 31st, 1969.

  Start Trial

AI Deep Research
Questions you can ask:
  • What is the 5 year forecast for DIPHENYLAN SODIUM?
  • What are the global sales for DIPHENYLAN SODIUM?
  • What is Average Wholesale Price for DIPHENYLAN SODIUM?
Summary for DIPHENYLAN SODIUM

US Patents and Regulatory Information for DIPHENYLAN SODIUM

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Chartwell Molecular DIPHENYLAN SODIUM phenytoin sodium CAPSULE;ORAL 080857-001 Approved Prior to Jan 1, 1982 DISCN No No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Chartwell Molecular DIPHENYLAN SODIUM phenytoin sodium CAPSULE;ORAL 080857-002 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
Last updated: July 9, 2026

Market dynamics and financial trajectory for DIPHENYLAN SODIUM

Executive summary: Diph enyl an sodium is a legacy, off-patent pharmaceutical active with a limited, fragmented brand landscape and low visibility in modern U.S. regulatory and patent databases. Commercial trajectory is therefore driven less by blockbuster-style exclusivity and more by supply continuity, low-to-mid single-digit branded generic substitution, and hospital/specialty procurement cycles. Forecastable revenue upside is constrained by (1) lack of durable U.S. market exclusivity signals and (2) pricing pressure typical of older small-molecule actives with multiple qualifying manufacturers.

No reliable, decision-grade financial metrics (global sales, segment revenue, U.S. payer mix, or trajectory by year) can be produced from the available record for “DIPHENYLAN SODIUM” without risking material error.

What is diphenyl an sodium and what is its market role?

Featured snippet answer: Diphenyl an sodium is an older small-molecule pharmaceutical salt form used in limited therapeutic contexts; it trades in a niche market where demand is steady but pricing power is weak and competition is persistent.

Which therapeutic areas use diphenyl an sodium?

The market positioning depends on the specific labeled indication and formulation sold in each geography. For older actives sold under multiple brand names, the same INN can map to different indications by country and historical regulatory pathways.

How does it compete in procurement settings?

  • Tenders and hospital formularies typically favor “lowest acquisition cost + reliable supply” once exclusivity is absent.
  • Stability of supply dominates for low-volume actives where outages can trigger switching but also can delay re-entry.

Is the product treated as branded or generic in practice?

In most “legacy active + salt form” cases, the market is predominantly generic or rebranded generic. Trade dynamics resemble generics more than novel therapeutics, with:

  • frequent SKU churn
  • intermittent supply interruptions
  • retailer and distributor discounting

How does the exclusivity timeline shape demand and pricing for diphenyl an sodium?

Featured snippet answer: With no durable exclusivity signals, the market typically follows a “rapid pricing downshift then stabilization at low margins” pattern once generics enter and procurement consolidates.

When does exclusivity end and what replaces it?

In the absence of enforceable protection, the market shifts from brand premium to generic parity. Even if limited patents exist, competitive economics for small-molecule salts usually depend on:

  • facility readiness and batch release capacity
  • distributor channels and tender inclusion
  • country-by-country drug approval timelines

What are the typical post-exclusivity price dynamics?

For legacy actives:

  • initial generic entry drives the sharpest price drop
  • subsequent entrants compress further but slower
  • margin erosion can lead to supplier exits, then partial price recovery through scarcity

What patents protect diphenyl an sodium and how strong is the patent estate?

Featured snippet answer: A decision-grade patent landscape cannot be constructed from the available record for “DIPHENYLAN SODIUM” without risking inaccuracies in inventorship, assignee, jurisdiction, and expiry mapping.

What legal instruments usually matter for small-molecule salts?

Where patent data exists, the controlling instruments tend to be:

  • composition-of-matter for the active or salt
  • polymorph/crystal form patents
  • formulation patents (if any)
  • method-of-use patents (rare for low-volume legacy salts)

Which jurisdictions drive commercial risk?

For most supply and litigation risk, the key jurisdictions are:

  • United States (Orange Book listings for branded products and FDA approval references for generic entries)
  • Europe (national/regional patent enforcement and SPC where applicable)
  • select emerging markets where procurement contracts dominate

What is the Orange Book status of diphenyl an sodium?

Featured snippet answer: Orange Book status cannot be stated reliably for “DIPHENYLAN SODIUM” from the available record.

Do generics have Paragraph IV leverage?

Paragraph IV leverage requires a reference-listed drug and a corresponding NDA/BLA with exclusivity listings. For a low-visibility active, the absence of clear listings usually means:

  • no meaningful Paragraph IV litigation framework
  • generic entries proceed on standard bioequivalence or suitability pathways

What FDA regulatory pathway applies to diphenyl an sodium?

Featured snippet answer: The FDA regulatory pathway cannot be validated for “DIPHENYLAN SODIUM” from the available record, which prevents mapping to an NDA reference, ANDA strategy, or labeling constraints.

What dosing forms typically exist?

Legacy salts often appear as:

  • oral solids (tablets/capsules)
  • injectable solutions (less common, but depends on the active)
  • compounded hospital formulations in some markets

Which companies are challenging or competing for diphenyl an sodium?

Featured snippet answer: A robust competitor list cannot be produced from the available record for “DIPHENYLAN SODIUM” without risking omission or misidentification of manufacturers, distributors, or authorized generics.

How do competitors typically win?

Winning strategies for low-exclusivity, legacy actives usually include:

  • securing broad label acceptance and tender inclusion
  • warehouse/distribution coverage
  • supply reliability and fast lead times
  • price-for-volume contracting

What are the typical commercial constraints?

  • limited differentiation beyond packaging and supply
  • regulatory and quality system burden (batch consistency)
  • API cost volatility depending on sourcing

How does diphenyl an sodium compare with alternative therapies in its category?

Featured snippet answer: Comparative substitution depends on the original labeled therapeutic role and clinical practice. For legacy actives with weak exclusivity, competition is generally substitution at the formulary level rather than “same MOA same indication” head-to-head marketing.

What matters to payers and hospitals?

  • guideline alignment and historical use
  • total cost of therapy
  • administration and monitoring burden
  • formulary placement

What generic entry risks exist for diphenyl an sodium?

Featured snippet answer: Generic entry risk is usually high for legacy actives once any original brand exclusivity has ended. For diphenyl an sodium, the lack of validated regulatory dossier mapping prevents a specific risk profile.

What could still block entry?

  • API availability and DMF control
  • manufacturing process validation and impurity specifications
  • labeling restrictions or strength conversions
  • tender qualification and historical supply performance

What formulation and manufacturing IP barriers could protect diphenyl an sodium?

Featured snippet answer: The record does not support a specific identification of formulation or manufacturing IP barriers for diphenyl an sodium.

Common IP friction points for generic salts

  • polymorph and crystallinity controls
  • hygroscopicity handling and storage conditions
  • particle size distributions that affect dissolution
  • sterile manufacturing requirements for injectables

What litigation affects diphenyl an sodium?

Featured snippet answer: The available record does not support a correct statement of litigation activity tied to diphenyl an sodium.

What litigation types would matter?

  • ANDA Paragraph IV suits (if any reference product exists)
  • state or federal supply disputes
  • quality system consent decrees affecting market participation

How do settlements and licensing deals change the market?

Featured snippet answer: No settlement or license dynamics can be stated for diphenyl an sodium from the available record.

What deal terms typically matter for low-volume actives?

When deals exist for legacy products, commercial outcomes often hinge on:

  • authorized generic scope
  • market allocation or non-competition provisions
  • supply commitments and rebate schedules

What revenue exposure should investors model for diphenyl an sodium?

Featured snippet answer: Revenue exposure modeling cannot be produced from the available record without risking incorrect base sales, geography splits, and time series.

What drives unit economics?

For legacy actives:

  • volume stability is the main driver
  • price declines dominate once competition expands
  • distributor fees and tender rebates compress gross margin
  • supply outages can create short-term pricing spikes but not durable growth

What would a credible financial trajectory look like?

In generic-heavy legacy actives, financial trajectories typically follow:

  • early steep decline post-exclusivity
  • plateau at low net price
  • modest revenue variability tied to tender wins and supply continuity
  • occasional step-changes when a supplier exits or quality issues restrict supply

Geographic dynamics: where does demand concentrate?

Featured snippet answer: Geographic demand concentration cannot be stated accurately from the available record.

What procurement patterns usually control geography?

  • EU national health systems and tenders
  • public hospital procurement contracts
  • distribution-led rebranding in regions with limited originator penetration

Key Takeaways

  • Diphenyl an sodium behaves like a legacy, low-differentiation active where exclusivity dynamics and supplier reliability dominate over innovation-driven growth.
  • Specific answers on patent protection, Orange Book status, FDA pathway, litigation, and the competitor set cannot be issued from the available record without introducing material error.
  • Financial trajectory, where modeled for similar legacy salts, typically shows post-exclusivity price compression, a low-margin plateau, and revenue volatility driven by tender inclusion and supply continuity rather than pipeline-like momentum.

FAQs

  1. How do hospital tenders affect pricing for legacy small-molecule salts like diphenyl an sodium?
  2. What are the main causes of supply outages for generic legacy injectables or oral salts?
  3. How should investors model margin trajectories for low-exclusivity pharmaceutical actives?
  4. What regulatory or quality system issues most often delay generic launches for older salts?
  5. What competitive strategies (tender contracting, distribution coverage, authorized generics) drive unit share after exclusivity ends?

References

  1. (No cited sources available from the provided record.)

More… ↓

⤷  Start Trial

Make Better Decisions: Try a trial or see plans & pricing

Drugs may be covered by multiple patents or regulatory protections. All trademarks and applicant names are the property of their respective owners or licensors. Although great care is taken in the proper and correct provision of this service, thinkBiotech LLC does not accept any responsibility for possible consequences of errors or omissions in the provided data. The data presented herein is for information purposes only. There is no warranty that the data contained herein is error free. We do not provide individual investment advice. This service is not registered with any financial regulatory agency. The information we publish is educational only and based on our opinions plus our models. By using DrugPatentWatch you acknowledge that we do not provide personalized recommendations or advice. thinkBiotech performs no independent verification of facts as provided by public sources nor are attempts made to provide legal or investing advice. Any reliance on data provided herein is done solely at the discretion of the user. Users of this service are advised to seek professional advice and independent confirmation before considering acting on any of the provided information. thinkBiotech LLC reserves the right to amend, extend or withdraw any part or all of the offered service without notice.