Last Updated: August 3, 2026

ABITREXATE Drug Patent Profile


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

Abitrexate is a drug marketed by Abic and is included in four NDAs.

The generic ingredient in ABITREXATE is methotrexate sodium. There are twenty drug master file entries for this compound. Thirty suppliers are listed for this compound. Additional details are available on the methotrexate sodium profile page.

DrugPatentWatch® Litigation and Generic Entry Outlook for Abitrexate

A generic version of ABITREXATE was approved as methotrexate sodium by HIKMA on September 16th, 1986.

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  • What is the 5 year forecast for ABITREXATE?
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  • What is Average Wholesale Price for ABITREXATE?
Summary for ABITREXATE
US Patents:0
Applicants:1
NDAs:4
Raw Ingredient (Bulk) Api Vendors: 137
Clinical Trials: 96
DailyMed Link:ABITREXATE at DailyMed
Recent Clinical Trials for ABITREXATE

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

SponsorPhase
City of Hope Medical CenterPhase 2
Children's Oncology GroupPhase 2/Phase 3
Children's Oncology GroupPhase 1/Phase 2

See all ABITREXATE clinical trials

US Patents and Regulatory Information for ABITREXATE

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Abic ABITREXATE methotrexate sodium INJECTABLE;INJECTION 089161-001 Mar 10, 1987 DISCN No No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Abic ABITREXATE methotrexate sodium INJECTABLE;INJECTION 089356-001 Jul 17, 1987 DISCN No No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Abic ABITREXATE methotrexate sodium INJECTABLE;INJECTION 089354-001 Jul 17, 1987 DISCN No No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Abic ABITREXATE methotrexate sodium INJECTABLE;INJECTION 089355-001 Jul 17, 1987 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 14, 2026

ABITREXATE (methotrexate) market dynamics and financial trajectory: pricing, volume, exclusivity, and generic/biosimilar risk

Executive summary: ABITREXATE is a brand name tied to methotrexate (typically for oncology, autoimmune, and rheumatology indications). The commercial profile is governed less by brand-specific patent leverage and more by methotrexate’s long-standing generic availability, payer-driven discounting, and the ongoing shift from branded to low-cost generics in most geographies. As a result, ABITREXATE’s financial trajectory is usually characterized by rapid margin compression, volume erosion after generic entry, and limited upside unless the product is reformulated (e.g., specific presentation, strength, route) or protected by late-expiring formulation/packaging or method-of-use patents.

No complete, source-verifiable dossier for “ABITREXATE” as a distinct branded product (company, NDA/ANDA, NDCs, Orange Book listing, label, launch date, revenue) is provided here, so a complete revenue-and-expiry model cannot be produced without risking incorrect facts.

What is ABITREXATE and what market does it serve?

Featured snippet answer: ABITREXATE is used in the therapeutic space covered by methotrexate. Demand is driven by patient flow in oncology and inflammatory diseases and by payer preferences for generic methotrexate across most markets.

Which indications typically drive methotrexate demand?

Methotrexate products are generally prescribed for:

  • Oncology: low-dose regimens in selected protocols and higher-dose regimens with rescue in other settings.
  • Rheumatology/dermatology: rheumatoid arthritis, psoriasis, and related inflammatory indications.
  • Other immune-mediated conditions: depending on jurisdiction and label.

How do formulation and route change the economics?

Market dynamics differ by:

  • Route: oral vs parenteral formulations face different substitution patterns.
  • Strengths and dosing units: payers often treat each NDC strength as substitutable or not depending on interchangeability policies.
  • Special packaging: unit-of-use formats can affect formulary adoption.

How do pricing and payer policies shape ABITREXATE’s profitability?

Featured snippet answer: Methotrexate’s pricing is constrained by generic competition, rebate structures, and payer formulary placement, leading to persistent erosion of brand net price after generic penetration.

Payer-driven margin compression: the typical pattern

For branded methotrexate products, profitability tends to move through three phases:

  1. Pre-generic pricing: higher net price, rebate pressure rising as competition approaches.
  2. Post-generic entry: rapid shift to generic scripts, forcing additional rebate and contracting.
  3. Mature market: stable low net pricing with intermittent volatility from NDC-specific availability, shortages, or contract renewals.

Key financial KPIs affected by payer contracting

  • Net sales vs gross-to-net: rebate intensity typically increases after generic entry.
  • Dispensing mix: share of prescriptions moving to A-rated generics or pharmacy store brands.
  • Channel inventory and pull-through: distribution stocking affects short-term revenue timing.

What drives net price in methotrexate generics vs brands

  • WAC-to-NADAC alignment (US): brands discount heavily to close the gap.
  • Tendering and hospital formularies (EU/UK): institutional procurement favors lowest acquisition cost with medical-necessity carveouts.
  • State substitution rules and interchangeability (US): increase generic substitution speed.

When does ABITREXATE face exclusivity loss or generic entry risk?

Featured snippet answer: Because methotrexate is long off-patent in most jurisdictions, generic entry risk is usually historical. The remaining risk for a specific brand presentation is late-expiring product-level IP (formulation, manufacturing, or method-of-use) and whether that brand remains non-substitutable at the NDC/presentation level.

Exclusivity sources that can still matter for a brand methotrexate

Even for older APIs, a brand presentation can be protected by:

  • Formulation patents (composition, excipients, stability, release characteristics).
  • Manufacturing method patents (process controls, impurity profiles).
  • New route or delivery system patents (less common for methotrexate but possible).
  • Regulatory exclusivities (usually limited because methotrexate is not newly introduced as an active ingredient).

Paragraph IV challenges: what to check

Paragraph IV certifications occur under Hatch-Waxman for ANDAs that reference an NDA. For a methotrexate brand, the commercial relevance of Paragraph IV litigation depends on:

  • Whether the brand is still referenced by active ANDA filings for the same presentation.
  • Whether any Orange Book patents are listed as covering the NDA drug product or method of use.

What patents protect ABITREXATE, and how strong is the patent estate?

Featured snippet answer: For methotrexate brands, patent estates usually narrow over time to presentation-specific claims. Without the specific ABITREXATE Orange Book listing (patent numbers, claims, assignees, expiration dates), a complete strength analysis cannot be reliably completed.

Patent estate categories to map

A robust estate review for a methotrexate brand typically separates:

  • Drug substance vs drug product claims
  • Use patents (method-of-use, indication)
  • Formulation (excipients, stability, particle size where applicable)
  • Process (sterility, impurity control)
  • Packaging (labeling, unit-of-use systems where claimed)

What is the Orange Book status of ABITREXATE?

Featured snippet answer: Orange Book status determines whether any ABITREXATE patents are still listed as protecting:

  • the drug substance,
  • the drug product (formulation/strength),
  • or methods of use.

A complete answer requires:

  • NDA number and NDC mapping to the correct Orange Book entry.
  • the specific listed patents and their expiration dates. Those details are not supplied here, so the status cannot be stated without introducing errors.

Which companies are likely competing with ABITREXATE?

Featured snippet answer: For methotrexate, competition typically comes from large generic manufacturers that supply oral and injectable methotrexate presentations and from wholesalers’ preferred contracting generics.

Competitive set: how to structure the market map

For a methotrexate brand, the competitive landscape is best segmented by:

  • Same route and dosage form (injectable vs oral)
  • Same strength range and dosing unit (NDC granularity)
  • Institution vs community pharmacy (hospital procurement differs)
  • Medical-necessity restrictions (switching policies)

How does ABITREXATE compare with other methotrexate brands on commercial trajectory?

Featured snippet answer: Brand methotrexate trajectories generally converge after generic adoption, with the main differentiators being:

  • presentation-level non-substitutability,
  • contracting strength with major pharmacy benefit managers and group purchasing organizations,
  • and supply continuity.

What typically explains outperformance

  • A brand that retains formulary placement longer via contracts.
  • A brand with distinct presentation that reduces interchangeability (e.g., proprietary injection device or unique stability profile).
  • Reduced pharmacy substitution due to clinical policy or patient-specific reasons.

What manufacturing and IP barriers can slow generic uptake for ABITREXATE?

Featured snippet answer: Generic uptake can slow if the ABITREXATE presentation has non-trivial formulation/process complexity, tight impurity tolerances, or persistent device and stability considerations, which can increase ANDA development and inspection risk.

Barriers to generic manufacture

  • Stability and shelf-life constraints at labeled temperature storage conditions.
  • Injectable sterility assurance and process validation requirements.
  • Narrow impurity ranges that complicate bioequivalence-like acceptance (for injectables, compliance is more analytical than PK-driven).

What FDA regulatory milestones and supply events affect ABITREXATE sales?

Featured snippet answer: For methotrexate, regulatory dynamics are usually secondary to supply continuity, substitution rules, and contract renewals.

Milestones that can swing quarterly sales

  • FDA approval changes tied to supplements (new strength, packaging).
  • Labeling updates affecting substitution policies.
  • Drug shortages and allocation decisions affecting channel fill rates.

How do biosimilar dynamics apply to ABITREXATE?

Featured snippet answer: Biosimilar dynamics generally do not apply to methotrexate. Biosimilars are relevant to biologics; methotrexate is a small-molecule drug substance. Any “ABITREXATE biosimilar” framing would be a category error.

What generic launch scenarios exist for ABITREXATE?

Featured snippet answer: The generic launch scenario for a methotrexate brand presentation is usually:

  • ANDA approval for one or more NDC strengths,
  • rapid pharmacy substitution and formulary updates,
  • immediate net price compression followed by stabilization at low levels.

Where launch timing can differ

  • ANDA approval date vs actual commercial availability.
  • Allocation and supply chain fill constraints.
  • Tender cycles in institutional markets.

What patent litigation affects ABITREXATE’s market share?

Featured snippet answer: Litigation matters only if ABITREXATE has still-listed patents that are being challenged via Paragraph IV, and the outcome delays the ANDA effective date.

Without the ABITREXATE NDA and Orange Book list, a credible litigation timeline cannot be produced here.

Key Takeaways

  • ABITREXATE’s commercial trajectory is largely a function of methotrexate genericization, payer rebates, and substitution dynamics rather than large, brand-specific revenue cliffs.
  • For most methotrexate brands, the expected pattern is net price erosion after generic entry, with limited upside unless ABITREXATE is protected at the product-level presentation (NDC-specific) and remains less substitutable.
  • A complete exclusivity, patent strength, and litigation-based forecast requires the specific Orange Book entry for ABITREXATE and its listed patents. Those facts are not present in the provided input, so a hard financial and legal model cannot be completed without risking inaccuracies.

FAQs

  1. How fast do generic methotrexate products typically take share after ANDA approval?
  2. Do method-of-use patents for methotrexate prevent generic substitution?
  3. What NDC-level factors determine whether a methotrexate brand stays on formularies longer?
  4. How do drug shortages of methotrexate affect net sales timing and channel inventory?
  5. What late-expiring formulation IP can still protect a methotrexate brand presentation?

References (APA)

No sources were provided with the prompt, and no Orange Book/NDA/ANDA docket or ABITREXATE product dossier details were supplied to cite.

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