Last Updated: July 28, 2026

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What are the generic sources for clascoterone and what is the scope of patent protection?

Clascoterone is the generic ingredient in one branded drug marketed by Sun Pharm and is included in one NDA. There are eight patents protecting this compound. Additional information is available in the individual branded drug profile pages.

Clascoterone has ninety-four patent family members in thirty countries.

Summary for clascoterone
International Patents:94
US Patents:8
Tradenames:1
Applicants:1
NDAs:1
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for clascoterone
DrugPatentWatch® Estimated Loss of Exclusivity (LOE) Date for clascoterone
Generic Entry Date for clascoterone*:
Constraining patent/regulatory exclusivity:
Dosage:

CREAM;TOPICAL

*The generic entry opportunity date is the latter of the last compound-claiming patent and the last regulatory exclusivity protection. Many factors can influence early or later generic entry. This date is provided as a rough estimate of generic entry potential and should not be used as an independent source.

Paragraph IV (Patent) Challenges for CLASCOTERONE
Tradename Dosage Ingredient Strength NDA ANDAs Submitted Submissiondate
WINLEVI Cream clascoterone 1% 213433 1 2024-08-26

US Patents and Regulatory Information for clascoterone

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Sun Pharm WINLEVI clascoterone CREAM;TOPICAL 213433-001 Aug 26, 2020 RX Yes Yes ⤷  Start Trial ⤷  Start Trial Y ⤷  Start Trial
Sun Pharm WINLEVI clascoterone CREAM;TOPICAL 213433-001 Aug 26, 2020 RX Yes Yes ⤷  Start Trial ⤷  Start Trial Y ⤷  Start Trial
Sun Pharm WINLEVI clascoterone CREAM;TOPICAL 213433-001 Aug 26, 2020 RX Yes Yes ⤷  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 clascoterone

Country Patent Number Title Estimated Expiration
Argentina 072235 ⤷  Start Trial
Argentina 111202 ⤷  Start Trial
Argentina 111351 ⤷  Start Trial
>Country >Patent Number >Title >Estimated Expiration

Supplementary Protection Certificates for clascoterone

Patent Number Supplementary Protection Certificate SPC Country SPC Expiration SPC Description
2503005 2025C/551 Belgium ⤷  Start Trial PRODUCT NAME: CLASCOTERON EN KRISTALLIJNE VORMEN DAARVAN; AUTHORISATION NUMBER AND DATE: EU/1/25/1927 20251021
2503005 854 Finland ⤷  Start Trial
2503005 C20250037 Finland ⤷  Start Trial
>Patent Number >Supplementary Protection Certificate >SPC Country >SPC Expiration >SPC Description

Clascoterone Investment & Fundamentals Analysis: Patent, Market Structure, and Commercial Reality

Last updated: April 25, 2026

Clascoterone is an androgen receptor (AR) inhibitor developed for acne and androgen-driven skin disorders. The commercial center of gravity is acne vulgaris in the U.S. via WINLEVI (clascoterone) cream, 1%. Investment evaluation hinges on (1) the strength and duration of patent coverage in key markets, (2) competitive dynamics from generic and next-generation topical acne products, and (3) whether clinical adoption broadens beyond initial label cohorts.

What is clascoterone, and where does it trade in the therapeutic map?

Clascoterone is a topical nonsteroidal AR inhibitor intended to reduce androgen-mediated signaling in skin. It is designed for local action with a topical administration route, which shapes both its regulatory path and its competitive set (topical antibiotics, retinoids, benzoyl peroxide combinations, and other topical AR-targeting or hormonal strategies where applicable).

Key commercial product

  • WINLEVI (clascoterone) cream, 1%
    • Indication (US): acne vulgaris
    • Regulatory status: approved topical androgen receptor inhibitor for acne

Core market implication: topical acne is a high-volume category with established payer familiarity, strong channel access, and a long tail of generics and over-the-counter competition. New entrants must win on efficacy, tolerability, and formulary positioning rather than patent-like differentiation alone.

How does the patent landscape shape investment risk and timing?

Patent-driven value for clascoterone is primarily a function of: 1) composition-of-matter protection on clascoterone (and close analogs), 2) formulation and use claims (topical delivery and acne indications), 3) geographic filing coverage and the persistence of enforceable claims into the expected commercialization window, 4) regulatory exclusivity timing tied to first marketing approval and clinical dossier.

A practical investment takeaway: topical acne products often face earlier than expected price pressure once composition protection weakens or when formulation/use claims are narrow. That pushes valuation toward firms with deep line-of-sight into claim strength and the ability to sustain enforcement through ANDA challenges, if they arise.

Investment reality check: without a clearly mapped set of granted claims with confirmed expiration dates by major jurisdiction, the most reliable approach is to value clascoterone on observable commercial milestones and the enforceability tail. That said, the market widely treats clascoterone as an originator with a defined branded period, and that branded period is the period where payer pull-through matters most.

What does the commercial and payer pipeline indicate for near-term fundamentals?

U.S. launch and adoption mechanics

WINLEVI’s fundamentals depend on:

  • dermatologist and primary-care prescribing adoption,
  • insurance coverage and net price realization,
  • switchability versus established topical regimens,
  • persistence of branded differentiation versus generic-friendly comparators.

In topical dermatology, volume does not automatically equal profit if net price collapses quickly. For branded acne assets, the investment driver is typically:

  • formulary behavior (preferred vs non-preferred tier),
  • rebate structure (managed through contracting and PBM leverage),
  • and channel penetration (independent, chain retail, mail).

Market structure and competitive pressure

The competitive set includes:

  • topical retinoids,
  • topical antimicrobials (including antibiotic-based regimens),
  • benzoyl peroxide combinations,
  • and standardized combination therapy products.

Clascoterone’s AR-specific mechanism positions it as a targeted alternative, but acne prescribing patterns remain resistant to switching unless the product wins on one of three axes:

  • superior speed or quality of response,
  • better tolerability (less irritation than some actives),
  • or meaningful improvement in combination regimens.

What are the key clinical and product attributes investors should underwrite?

Pharmacology and differentiation

Clascoterone is an AR inhibitor with topical delivery. For acne, the investment-relevant attribute is that it is intended to suppress androgen-mediated signaling in the pilosebaceous unit environment, which can broaden relevance beyond a single mechanistic bucket.

Product design: tolerance and adherence

For topical dermatology, the fundamentals are often adherence-driven:

  • irritation profile,
  • application frequency,
  • vehicle tolerability,
  • and ease of integrating into existing acne routines.

In acne, low irritation and simple dosing can translate into higher persistence, which matters for branded retention.

What does the investment case look like if valuation is anchored to branded duration?

A branded-duration model for clascoterone focuses on: 1) Net sales ramp and durability after initial uptake, 2) formulary conversion (preferred status vs non-preferred), 3) competitive erosion from generic topical regimens, 4) defensibility against copycat formulations through formulation and use claim strength, 5) pipeline expansion beyond acne (if any) that can extend the revenue horizon.

Scenario framework

The most decision-useful way to underwrite clascoterone is as a binary branded endurance story with staged catalysts:

  • Base case: continued dermatologist-led adoption and stable payer access through the protected branded window; gradual share loss to multi-active topical regimens but limited wholesale price collapse while branded exclusivity holds.
  • Bear case: faster-than-expected shift to standard-of-care generics and OTC agents; net price degradation due to tighter PBM contracting; slower conversion from niche prescribing to broad coverage.
  • Bull case: improved formulary positioning and stronger real-world retention (persistence) driven by tolerability and efficacy; payer coverage upgrades; potential label expansion to broader acne phenotypes if supported by evidence.

Where does clascoterone sit relative to typical topical acne economics?

Topical acne economics are shaped by:

  • high marketing intensity for new branded products early,
  • rapid switching behavior once price and coverage deteriorate,
  • mature channel infrastructure that favors established lines.

For clascoterone, the investment question becomes whether it can outlast generic price anchoring long enough to harvest value before exclusivity weakens.

Practical underwriting metrics investors track

Even without company-specific internal data, investors can track:

  • prescription growth in key dermatology prescriber segments,
  • net sales per script trend,
  • formulary placements over time,
  • and competitor launches that reframe acne treatment choices.

What are the principal diligence items for an R&D or investment screen?

Patent and regulatory diligence priorities

  • Confirm granted claim scope (composition-of-matter and formulation/use claims) in the U.S. and key ex-U.S. jurisdictions.
  • Map claim survival probabilities across relevant expiry horizons.
  • Validate regulatory exclusivity layers tied to the first approval date and any related regulatory milestones.
  • Identify the realistic copying vectors: generics of clascoterone versus reformulations, versus “indication” carve-outs.

Commercial diligence priorities

  • Determine whether WINLEVI’s adoption is driven by:
    • new starts,
    • switching from branded comparators,
    • or add-on patterns.
  • Track persistence and refill behavior as a proxy for adherence advantage.
  • Benchmark net price trajectory against category benchmarks.

Competitive diligence priorities

  • Monitor new acne actives and combination strategies that target physician workflow and payer rebates.
  • Monitor antibiotic stewardship rules and how they influence product selection, since that can reallocate demand toward non-antibiotic regimens.

What do the sources imply for investor-grade bottom lines?

The most investable conclusion is mechanistic and commercial: clascoterone is positioned as a topical, AR-targeted acne therapy competing in a commoditizing acne landscape. That means valuation depends less on “novel mechanism” narratives and more on whether branded WINLEVI holds coverage and net price through exclusivity and claim enforceability.

If exclusivity and enforceability last, the asset’s fundamentals can support a branded sales ramp and sustained returns. If not, the category’s generic structure compresses margins quickly.

Key Takeaways

  • Clascoterone’s commercial value is anchored in WINLEVI (clascoterone) cream, 1% for acne vulgaris in the U.S.
  • Investment risk is primarily exclusivity and enforceability driven in a market that erodes branded differentiation as generics and combination regimens spread.
  • Commercial fundamentals depend on payer behavior and persistence, not just initial prescription starts.
  • The most decision-relevant underwriting model is branded-duration survival with staged catalysts around coverage, net price, and durability of share.
  • Diligence should prioritize claim scope and real-world adoption mechanics (switching vs new starts, tolerability-driven adherence, and formulary placement).

FAQs

1) What is the approved use of clascoterone in the U.S.?

Clascoterone is approved as WINLEVI (clascoterone) cream, 1% for acne vulgaris in the U.S. (FDA label) [1].

2) What is clascoterone’s mechanism of action?

Clascoterone is a topical androgen receptor inhibitor intended to reduce androgen-mediated signaling in skin involved in acne pathophysiology (FDA label) [1].

3) What determines whether clascoterone remains a high-value branded asset?

The primary determinants are enforceable intellectual property duration, regulatory exclusivity, and payer net pricing durability against generic and combination topical acne therapies (FDA label; patent-driven commercialization logic) [1].

4) How does the competitive landscape affect clascoterone’s fundamentals?

Topical acne is a mature category with strong standard-of-care regimens and generic penetration, so clascoterone’s share and net price depend on real-world adherence and tolerability plus formulary status rather than mechanism novelty alone [1].

5) What diligence items matter most for investors evaluating clascoterone?

Investors should focus on claim scope and survival, regulatory milestone timing, and coverage and persistence metrics that drive branded revenue durability (FDA label) [1].


References

[1] U.S. Food and Drug Administration. (2020). WINLEVI (clascoterone) cream, 1% Prescribing Information. https://www.accessdata.fda.gov/

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