Last Updated: June 17, 2026

Currax Company Profile


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Summary for Currax
International Patents:130
US Patents:29
Tradenames:3
Ingredients:3
NDAs:3
Patent Litigation for Currax: See patent lawsuits for Currax

Drugs and US Patents for Currax

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Currax SILENOR doxepin hydrochloride TABLET;ORAL 022036-002 Mar 17, 2010 AB RX Yes Yes 11,096,920 ⤷  Start Trial ⤷  Start Trial
Currax SILENOR doxepin hydrochloride TABLET;ORAL 022036-002 Mar 17, 2010 AB RX Yes Yes 8,513,299 ⤷  Start Trial ⤷  Start Trial
Currax SILENOR doxepin hydrochloride TABLET;ORAL 022036-002 Mar 17, 2010 AB RX Yes Yes 9,107,898 ⤷  Start Trial ⤷  Start Trial
Currax SILENOR doxepin hydrochloride TABLET;ORAL 022036-001 Mar 17, 2010 AB RX Yes No 9,861,607 ⤷  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

Expired US Patents for Currax

Applicant Tradename Generic Name Dosage NDA Approval Date Patent No. Patent Expiration
Currax SILENOR doxepin hydrochloride TABLET;ORAL 022036-001 Mar 17, 2010 5,866,166 ⤷  Start Trial
Currax ONZETRA XSAIL sumatriptan succinate POWDER;NASAL 206099-001 Jan 27, 2016 8,047,202 ⤷  Start Trial
Currax SILENOR doxepin hydrochloride TABLET;ORAL 022036-002 Mar 17, 2010 6,217,909 ⤷  Start Trial
Currax SILENOR doxepin hydrochloride TABLET;ORAL 022036-001 Mar 17, 2010 5,725,884 ⤷  Start Trial
>Applicant >Tradename >Generic Name >Dosage >NDA >Approval Date >Patent No. >Patent Expiration
Paragraph IV (Patent) Challenges for CURRAX drugs
Drugname Dosage Strength Tradename Submissiondate
➤ Subscribe Tablets 3 mg and 6 mg ➤ Subscribe 2010-09-16

Supplementary Protection Certificates for Currax Drugs

Patent Number Supplementary Protection Certificate SPC Country SPC Expiration SPC Description
0984957 PA2011005,C0984957 Lithuania ⤷  Start Trial PRODUCT NAME: NAPROXENUM + ESOMEPRAZOLUM; REGISTRATION NO/DATE: LT/1/10/2302/001-LT/1/10/2302/012 20110126
1411900 SPC/GB11/015 United Kingdom ⤷  Start Trial PRODUCT NAME: NAPROXEN AND ESOMEPRAZOLE; REGISTERED: UK PL 17901/0263-0001 20101105
1411900 122012000052 Germany ⤷  Start Trial PRODUCT NAME: NAPROXEN MIT ESOMEPRAZOL; NAT. REGISTRATION NO/DATE: 85145.00.00 20120202; FIRST REGISTRATION: GROSSBRITANNIEN PL 17901/0263 - 0001 20101105
1411900 2011C/016 Belgium ⤷  Start Trial PRODUCT NAME: NAPROXENE ET ESOMEPRAZOLE (SOUS LA FORME D'ESOMEPRAZOLE MAGNESIUM TRIHYDRATE); AUTHORISATION NUMBER AND DATE: BE382505 20101214
>Patent Number >Supplementary Protection Certificate >SPC Country >SPC Expiration >SPC Description
Similar Applicant Names
Applicants may be listed under multiple names.
Here is a list of applicants with similar names.

Currax Pharmaceutical Competitive Landscape Analysis: Market Position, Patent Strength, and Generic/Biosimilar Entry Risks

Last updated: June 1, 2026

Currax’s competitive position can be assessed only by linking (1) the company’s specific marketed products to (2) their FDA status and (3) the underlying US patent/Orange Book estates. No product name, active ingredient, dosage form, or FDA listing scope was provided, so a complete, accurate competitive landscape and IP/exclusivity map cannot be produced from the available information.

What is Currax’s market position and product lineup in US healthcare?

No Currax product list, therapeutic indications, NDCs, or portfolio scope is provided. Without the active ingredients and FDA-approved products, market share drivers, payer positioning, and competitive set composition cannot be determined.

How do Currax’s marketed drugs compare with competing brands and generics?

A brand-vs-generic comparison requires: the Currax active ingredients, strength and dosage forms, FDA approval dates, and the identity of the competing reference listed drugs. None of this is specified.

Which Currax products generate revenue exposure and what is the competitive intensity?

Revenue exposure depends on sales by molecule and timing of exclusivity/patent cliffs. No product-level sales, segment reporting, or timeline is available.


What patents protect Currax products and how strong is the patent estate?

A patent estate analysis requires at least one of the following: US patent numbers, Orange Book reference product identifiers, or FDA application/NDA/BLA numbers tied to Currax products. None were provided.

How many Currax patents cover each drug’s formulation, method of use, and manufacturing?

Counts by category require the published US patent families associated with the Orange Book “listed drug” and/or any relevant FDA decision/regulatory exclusivity. Without the products, no accurate enumeration can be produced.

What is the patent-holder profile (assignees, inventors, licensing structure) for Currax?

This requires the relevant patent documents. No patent list or assignee data is provided.


When does Currax lose exclusivity for each drug under FDA rules?

Exclusivity timelines require: (1) FDA approval dates, (2) patent expiry dates, and (3) regulatory exclusivity types (3-year, 5-year, pediatric, orphan, interchangeability exclusivity for biologics, etc.). None of these inputs are specified for Currax.

When do Currax’s key US patents expire (Orange Book listed patents vs. other relevant patents)?

Expiration mapping needs specific Orange Book-listed patent numbers per reference product. Not provided.

What regulatory exclusivity periods (NCE, 505(b)(2), orphan, pediatric) limit generic entry?

No active ingredients or approval pathways were provided, so regulatory exclusivity cannot be mapped.


What generic entry risks exist for Currax products after Paragraph IV filings?

Paragraph IV risk is assessed by identifying: ANDA filers, filing dates, Orange Book “notice letter” timelines, and whether a settlement triggers a 180-day exclusivity slot. None of this is available without the relevant ANDA/NDA pairings.

Which companies are challenging Currax products with ANDAs or 505(b)(2s)?

No Currax drug identifiers or ANDA challenges were supplied.

What are the likely “first generic” scenarios and 180-day exclusivity triggers?

This requires the identity and status of the first-filer ANDA for each reference product, plus any forfeiture/settlement terms. None were provided.


What biosimilar risk exists for Currax if the portfolio includes biologics?

Biosimilar risk requires the reference BLA names, interchangeability posture, and the biosimilar pipeline. No Currax biologic product information was provided.

How do Currax’s biologics compare on immunogenicity, formulation, and device/administration constraints?

This requires the specific biologics and their dosing modalities. Not provided.


What formulations are protected by Currax patents (salt forms, polymorphs, coatings, long-acting injectables)?

Formulation IP analysis requires product-specific patent claims, which were not provided.

Do Currax products have line extensions that extend protection (reformulations, new strengths, new indications)?

Line-extension mapping requires Currax’s development history and the patent families tied to each lifecycle change. None is included.


Which Orange Book listings apply to Currax and what is the status of each reference product?

Orange Book status requires NDC-level linkage to reference listed drugs and listed patents. Without product identifiers, an Orange Book table cannot be constructed.

What is the Orange Book listing count (patent families and listed patents) per Currax reference product?

Not possible without reference product identifiers.


What patent litigation affects Currax’s market exclusivity and generic/barrier timing?

Litigation risk requires case dockets, venues, asserted patents, and schedules (PTO stays, PI decisions, trial dates). No litigation records or case captions were provided.

Which patents are asserted against ANDA filers or against Currax, and what are the outcomes?

Not available without litigation identifiers.

Have Currax entered into settlement agreements that trigger FDA approval timing changes?

Settlement analysis needs agreement terms and FDA stoppage/approval dates, which were not provided.


How does Currax compare with other companies in the same therapeutic class?

Competitive class comparisons require the therapeutic categories and Currax’s molecules. None were provided, so a competitor set cannot be defined.

What is Currax’s competitive differentiation (access, REMS, supply chain, clinical outcomes, contracting)?

Differentiation depends on product indications, payer strategy, and safety programs. No product-level data is available.


Which manufacturing/IP barriers could delay Currax generics or competitor launches?

Manufacturing/IP barriers require: process patents, critical quality attributes, controls, and any trade-secret or know-how elements tied to patent claims. None were provided.

Do Currax process patents create enforceable constraints on generic manufacturing (engineering, scale-up, purification)?

Not possible without process patent claims and manufacturing disclosures.


Key Takeaways

A Currax competitive landscape analysis cannot be completed with the information provided. Producing an accurate market position, exclusivity timeline, Orange Book/patent estate map, and generic/biosimilar entry risk model requires Currax’s specific FDA-approved products (active ingredients, NDCs, and reference listed drugs) or at least their patent/pipeline identifiers.


FAQs

  1. How do you determine the Currax “reference listed drug” for Orange Book exclusivity mapping?
  2. What data fields are required to run a Paragraph IV risk model for Currax products?
  3. How is biosimilar interchangeability risk assessed for a Currax biologic?
  4. How do formulation patent categories (salt, polymorph, coating, device) change generic development paths?
  5. What litigation docket events most affect FDA approval timing for ANDA challengers?

References (APA)

  1. FDA. Orange Book: Approved Drug Products with Therapeutic Equivalence Evaluations. U.S. Food and Drug Administration.
  2. FDA. Drugs@FDA. U.S. Food and Drug Administration.
  3. FDA. Purple Book: Lists of Licensed Biological Products. U.S. Food and Drug Administration.

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