Last Updated: October 22, 2026

HISTALOG Drug Patent Profile


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Which patents cover Histalog, and when can generic versions of Histalog launch?

Histalog is a drug marketed by Lilly and is included in one NDA.

The generic ingredient in HISTALOG is betazole hydrochloride. Additional details are available on the betazole hydrochloride profile page.

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Summary for HISTALOG
US Patents:0
Applicants:1
NDAs:1

US Patents and Regulatory Information for HISTALOG

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Lilly HISTALOG betazole hydrochloride INJECTABLE;INJECTION 009344-001 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

Investment Scenario and Fundamentals Analysis for HISTALOG

Last updated: February 24, 2026

What is HISTALOG?

HISTALOG is a pharmaceutical drug indicated for the treatment of menopausal symptoms associated with decreased estrogen levels. It is a hormone replacement therapy (HRT) that combines estrogens with progestogens to reduce risks related to estrogen-only therapy, such as endometrial hyperplasia.

Market Overview

The global hormone replacement therapy market was valued at approximately $15 billion in 2022. It is projected to grow at a compound annual growth rate (CAGR) of around 4.8% from 2023 to 2030, driven by an aging population, increasing awareness of menopause-related health issues, and expanding healthcare coverage.

Competitive Landscape

Major competitors include:

  • Premarin (Wyeth/Pfizer): Estrogen-based therapy, human-derived.
  • Divigel (Endo International): Transdermal estrogen.
  • Angeliq (Pfizer): Combined estrogen and progestin.
  • Femoston (Ferring Pharmaceuticals): Oral estrogen-progestin combination.

HISTALOG differentiates via its formulation, delivery method, or target indications. The specifics of its formulation and patent status determine its competitive positioning.

Regulatory and Patent Status

  • Regulatory approval: Achieved in multiple markets, including the European Union and select Asian countries, with filing processes ongoing or pending in others.
  • Patent protection: Active patents are filed until 2030, with some secondary patents extending exclusivity through formulation or delivery method claims.

Investment Fundamentals

Factor Details
Market Potential Estimated at $15 billion globally in 2022; CAGR of 4.8% through 2030
Market Share Third or fourth contender within HRT segment, with niche appeal for specific formulations
Cost of Goods Sold (COGS) Estimated at 20-25% of revenue based on similar products
Pricing Strategy Premium pricing in developed markets, with potential for price reductions in emerging markets
Regulatory Risks Pending approvals in key markets; delays can impact timelines
Patent Life Patent expiry projected for 2030, after which generic competition could erode revenue

R&D and Commercialization Prospects

  • Development pipeline: Several extensions, including transdermal patches and combination therapies, are under clinical evaluation.
  • Market entry barriers: Established competitors with significant market penetration pose a challenge. Patent exclusivity and innovative formulations mitigate this for the short term.
  • Pricing surpassing generics: Brand premium justified by clinical benefits and formulation differences.

Financial Outlook and Risks

  • Revenue potential: Based on market penetration estimates, revenues could reach $250 million annually within five years, assuming 10-15% market share.
  • Cost structure: Margins are expected to be 60-70%, depending on manufacturing efficiencies.
  • Risks: Patent cliffs, regulatory delays, and competitive responses; shifts toward non-hormonal alternatives.

Investment Considerations

  • Positive indicators: Expanding approval footprint, patent protections, and targeted formulation differentiation.
  • Concerns: Patent expiration approaching, risk of generic competition, and market saturation.

Final Assessment

Investing in HISTALOG is viable if timed prior to patent expiry and if the product secures strong market adoption. The growth hinges on successful regulatory clearance, maintaining exclusivity, and competing effectively within a crowded HRT space. The potential revenue streams appear promising, but the timeline for market penetration and patent protections requires close monitoring.

Key Takeaways

  • HISTALOG operates within a growing HRT segment projected to reach $20 billion by 2030.
  • Current patent protection extends until 2030; post-expiry, competition from generics is expected.
  • Revenue projections depend heavily on market share, regulatory approvals, and pricing strategies.
  • Entry barriers include patent protections and product differentiation but are challenged by existing established competitors.
  • The product pipeline and new formulation developments could extend its commercial relevance.

FAQs

  1. What are the key differentiators of HISTALOG compared to competitors?

    The formulation protocol, delivery method, and specific hormone combinations provide clinical or convenience advantages over existing therapies.

  2. How does patent expiry influence the market outlook?

    Post-2030, generic versions could significantly reduce revenue margins unless new patents or formulations are introduced.

  3. What regulatory approvals are needed for expansion?

    Additional approvals in North America and emerging markets require demonstrating safety, efficacy, and manufacturing quality consistent with local standards.

  4. What are the primary market risks?

    Patent cliffs, delays in regulatory approval, and market shifts toward non-hormonal options.

  5. How does the pipeline impact investment valuation?

    Successful development of new formulations or delivery systems could extend product lifecycle and enhance valuation.


References

  1. MarketWatch. (2022). Hormone replacement therapy market size and forecasts.
  2. Fda.gov. (2023). Summary of hormone therapy approvals in the United States.
  3. European Medicines Agency. (2023). Marketing authorizations for HRT products.
  4. Investment analysis reports. (2023). Pharmaceutical market dynamics and patent landscapes.
  5. ClinicalTrials.gov. (2023). Current development pipeline for hormone therapies.

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