Last Updated: May 3, 2026

TEMODAR Drug Patent Profile


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

Temodar is a drug marketed by Merck Sharp Dohme and is included in two NDAs.

The generic ingredient in TEMODAR is temozolomide. There are sixteen drug master file entries for this compound. Ten suppliers are listed for this compound. Additional details are available on the temozolomide profile page.

DrugPatentWatch® Litigation and Generic Entry Outlook for Temodar

A generic version of TEMODAR was approved as temozolomide by SUN PHARM on February 12th, 2014.

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Summary for TEMODAR
US Patents:0
Applicants:1
NDAs:2
Paragraph IV (Patent) Challenges for TEMODAR
Tradename Dosage Ingredient Strength NDA ANDAs Submitted Submissiondate
TEMODAR Capsules temozolomide 140 mg and 180 mg 021029 1 2008-03-24
TEMODAR Capsules temozolomide 5 mg, 20 mg, 100 mg and 250 mg 021029 1 2007-03-20

US Patents and Regulatory Information for TEMODAR

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Merck Sharp Dohme TEMODAR temozolomide CAPSULE;ORAL 021029-001 Aug 11, 1999 DISCN Yes No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Merck Sharp Dohme TEMODAR temozolomide POWDER;INTRAVENOUS 022277-001 Feb 27, 2009 RX Yes Yes ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Merck Sharp Dohme TEMODAR temozolomide CAPSULE;ORAL 021029-005 Oct 19, 2006 DISCN Yes No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Merck Sharp Dohme TEMODAR temozolomide CAPSULE;ORAL 021029-002 Aug 11, 1999 DISCN Yes No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Merck Sharp Dohme TEMODAR temozolomide CAPSULE;ORAL 021029-003 Aug 11, 1999 DISCN Yes No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Merck Sharp Dohme TEMODAR temozolomide CAPSULE;ORAL 021029-004 Aug 11, 1999 DISCN Yes 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

International Patents for TEMODAR

See the table below for patents covering TEMODAR around the world.

Country Patent Number Title Estimated Expiration
Brazil PI0307802 formulação farmacêutica compreendendo temozolomida, processo para a produção da mesma, bem como artigo fabricado contendo pó liofilizado compreendendo temozolomida ⤷  Start Trial
United Kingdom 2104522 TETRAZINE DERIVATIVES ⤷  Start Trial
South Korea 100970528 ⤷  Start Trial
Netherlands 192739 ⤷  Start Trial
Australia 571430 ⤷  Start Trial
Hungary T72665 ⤷  Start Trial
>Country >Patent Number >Title >Estimated Expiration

TEMODAR (temozolomide) investment and fundamentals analysis

Last updated: April 25, 2026

What is TEMODAR and how is the product monetized?

TEMODAR is the brand name for temozolomide, an oral alkylating chemotherapy drug used in neuro-oncology, most notably glioblastoma and anaplastic astrocytoma.

Core commercialization structure

  • Active ingredient: temozolomide (oral).
  • Primary markets: US, EU5, Japan, and other established oncology markets where generic penetration is high.
  • Typical revenue driver: prescription volume plus payer reimbursement stability in neuro-oncology; pricing power is limited by generic competition.

Commercial model implications for investors

  • TEMODAR behaves like a mature oncology asset with revenue that trends with:
    • incident/prevalence of eligible brain-tumor populations,
    • standard-of-care regimen adherence,
    • payer controls and channel inventory cycles,
    • conversion of branded prescriptions to generics (where available).

What are the major indications and practical use patterns that drive demand?

Key labeled uses

  • Newly diagnosed glioblastoma: temozolomide with radiotherapy followed by adjuvant temozolomide.
  • Recurrent/progressive glioblastoma: temozolomide monotherapy in patients with recurrent disease.
  • Anaplastic astrocytoma: historically used for this setting in relevant regions and label structures.

Demand pattern

  • Neuro-oncology treatment pathways create high episodic demand (patients receive finite treatment courses).
  • Demand is sensitive to:
    • guideline updates that shift sequencing (chemo vs re-irradiation vs clinical trials),
    • safety tolerability in elderly or frail populations,
    • availability of alternative standards that replace temozolomide in first-line combinations in some subgroups.

What does the competitive landscape look like?

TEMODAR is subject to the economics of generic chemotherapy.

  • Once branded exclusivity ends, generic temozolomide typically captures most market share.
  • Chemotherapy oral formulations often face fewer “market access” frictions than biologics, but price erosion and wholesale contract pressure are standard.

Competitor set (generic category)

  • Multiple manufacturers supply temozolomide tablets and dosing strengths across major jurisdictions.
  • In practice, branded TEMODAR competes on:
    • trust and prescribing inertia,
    • supply reliability,
    • patient assistance dynamics (where still offered),
    • local payer formularies.

Investment-relevant conclusion

  • TEMODAR is typically not a growth story like pipeline oncology. It is a cash-flow story that tracks disease burden and market share retention versus generics.

What do the fundamentals imply for cash flows and valuation?

1) Revenue durability

  • Revenues are durable because glioblastoma and anaplastic astrocytoma remain treated with temozolomide in mainstream regimens in many geographies.
  • Revenues are constrained because generic versions generally compress branded net price.

2) Margin structure

  • Branded gross margins shrink after generic entry due to:
    • price concessions,
    • channel negotiations,
    • payer rebates and conversion pressure.
  • Cost of goods is usually low relative to biologics, which can protect gross margin even when price declines, but net margin is still hit by competitive contracting.

3) Volatility drivers

  • Supply interruptions or manufacturing constraints can temporarily improve branded share but usually normalize quickly.
  • Payer formulary changes and contracting waves drive short-term volatility.

4) Capital intensity

  • Oral small-molecule manufacturing is typically less capital-intensive than biologics, but chemotherapy facilities face stringent compliance costs and quality system overhead.

What does the patent and exclusivity posture mean for investors?

Patent and exclusivity posture is the main structural driver of branded TEMODAR economics.

  • Temozolomide’s early development dates and typical oncology timelines mean branded protection has already largely transitioned to a generic environment in major markets.
  • The practical outcome is that long-term branded growth is constrained and depends on:
    • region-specific lifecycle differences,
    • any line-extension IP (formulation, dosing, or manufacturing improvements),
    • ongoing brand positioning and supply stability.

Investment implication

  • TEMODAR should be underwritten on mature-asset dynamics: modest topline with expectation of continued generic share pressure rather than blockbuster-like expansion.

What are the key clinical and guideline factors supporting use?

Even in a competitive oncology landscape, temozolomide retains guideline relevance because:

  • it improves outcomes in glioblastoma when used with radiotherapy in newly diagnosed patients (standard combination cornerstone in many guideline regimes),
  • it is an established option for recurrent disease, with multiple evidence-backed dosing schedules and established safety management.

Translation into commercial fundamentals

  • The drug’s clinical position sustains baseline demand even when substitutes appear.
  • The practical ceiling for premium pricing remains generic competition, not clinical obsolescence.

How should an investor model demand for TEMODAR?

Underwriting framework

Model annual revenue using a 4-block structure:

  1. Population base
    • glioblastoma incidence plus eligible recurrent patients by line of therapy.
  2. Treatment uptake
    • percentage of patients receiving temozolomide-based regimens.
  3. Share and conversion
    • brand share versus generics by geography and channel.
  4. Net pricing
    • branded net price minus rebates and contracting effects.

Key sensitivities

  • Generic erosion velocity: pace of conversion in each geography.
  • Net price changes: payer-driven reimbursement pressure.
  • Clinical sequencing changes: guideline updates shifting use toward or away from temozolomide.

What are near-term catalysts and headwinds?

Catalysts (usually incremental, not game-changing)

  • Sustained guideline endorsement in newly diagnosed glioblastoma combinations.
  • Any stabilization in supply that supports uninterrupted prescription fill.
  • Contract wins that protect net price or preserve brand share in key accounts.

Headwinds (structural)

  • Continued generic price pressure and share loss.
  • Any competitive shift toward alternative chemo backbones or trial-driven standard-of-care changes that reduce temozolomide reliance in certain patient strata.
  • Pricing and contracting tightening from payers as utilization shifts.

How does TEMODAR compare with modern oncology growth assets?

  • TEMODAR competes in a mature segment with limited pricing power.
  • Modern oncology growth assets tend to rely on:
    • differentiated mechanisms,
    • strong patent-protected pricing,
    • and durable patient access economics.
  • TEMODAR’s investment profile is closer to:
    • cash yield,
    • downside stability (because indications remain treated),
    • and constrained growth.

What does the “investable takeaway” look like?

TEMODAR is investable as a mature neuro-oncology cash-flow asset rather than a high-growth platform. The key question is not whether temozolomide is clinically used; it is whether branded economics can be defended against generics through contracts, channel mix, and supply reliability, in a way that produces acceptable net revenue and margin durability.


Key Takeaways

  • TEMODAR is temozolomide, a mature oral chemotherapy with key use in newly diagnosed and recurrent glioblastoma.
  • Demand is supported by standard-of-care positioning but monetization is limited by generic competition.
  • Investor underwriting should focus on net price durability, branded share vs generics, and episode-based utilization, not blockbuster-style growth.
  • The asset behaves like a cash-flow and resilience investment, with structural headwinds tied to brand conversion and payer contracting.

FAQs

1) Is TEMODAR still relevant in glioblastoma treatment?

Yes. Temozolomide remains a core component in many standard regimens for glioblastoma, which supports baseline demand.

2) Why does generic competition matter most for TEMODAR investors?

Generic temozolomide typically captures most volume once branded exclusivity ends, compressing net pricing and reducing branded revenue and margin.

3) What drives TEMODAR revenue in practice?

The main drivers are eligible patient volume, uptake into temozolomide-containing regimens, branded share versus generics, and net pricing after payer contracting.

4) Is TEMODAR’s growth tied to R&D breakthroughs?

No. TEMODAR is a mature product. Growth depends on market access, contract economics, and share retention rather than new clinical differentiation.

5) What type of investor profile fits TEMODAR best?

An investor seeking mature oncology cash-flow characteristics, where downside is mitigated by continuing clinical use but upside is capped by generic pricing.


References

[1] U.S. Food and Drug Administration. TEMODAR (temozolomide) prescribing information. FDA label.
[2] National Comprehensive Cancer Network (NCCN). NCCN Guidelines for Central Nervous System Cancers (glioblastoma and anaplastic astrocytoma sections).
[3] European Medicines Agency (EMA). TEMODAL and temozolomide product information and related scientific documentation.

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