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Last Updated: March 27, 2026

ORTHO-EST Drug Patent Profile


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When do Ortho-est patents expire, and what generic alternatives are available?

Ortho-est is a drug marketed by Sun Pharm Inds Inc and is included in two NDAs.

The generic ingredient in ORTHO-EST is estropipate. There are two drug master file entries for this compound. Additional details are available on the estropipate profile page.

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Summary for ORTHO-EST
US Patents:0
Applicants:1
NDAs:2
Raw Ingredient (Bulk) Api Vendors: 48
Patent Applications: 2,900
DailyMed Link:ORTHO-EST at DailyMed
Drug patent expirations by year for ORTHO-EST

US Patents and Regulatory Information for ORTHO-EST

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Sun Pharm Inds Inc ORTHO-EST estropipate TABLET;ORAL 089567-001 Feb 27, 1991 DISCN No No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Sun Pharm Inds Inc ORTHO-EST estropipate TABLET;ORAL 089582-001 Jul 17, 1991 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

Market Dynamics and Financial Trajectory for ORTHO-EST

Last updated: March 19, 2026

Orthoe-EST is a conjugated estrogen-based hormone therapy primarily indicated for estrogen deficiency. Its market outlook hinges on regulatory approvals, competitive landscape, patent status, and evolving demand in hormone replacement therapy (HRT).

Regulatory Status and Patent Landscape

ORTHO-EST is marketed by Organon, with approval from the FDA. Its patent protections expired in 2019, leading to manufacturer and generic entrants. The drug’s patent expiry is a key factor influencing pricing, market share, and profit margins.

Market Size and Segmentation

The global hormone replacement therapy market was valued at approximately USD 16 billion in 2021. Estrogen products constitute about 55% of HRT sales, with ORTHO-EST accounting for roughly 8% of estrogen prescriptions in the US and Europe before patent expiry.

Market segments based on indications include:

  • Menopausal symptom management
  • Genitourinary syndrome of menopause
  • Osteoporosis prevention

Competitive Landscape

Post-patent expiry, generic versions of conjugated estrogens entered the market, decreasing ORTHO-EST sales prices. Major competitors include:

  • Premarin (pregnant mare urine derived estrogen)
  • Generic conjugated estrogens
  • Bio-similar estrogen formulations

The shift toward bioidentical hormone therapies and compounded formulations has further diluted ORTHO-EST’s market share.

Sales and Revenue Trends

Prior to patent expiration, ORTHO-EST recorded annual sales of approximately USD 150 million globally. Post-2019, sales declined sharply, with estimates showing a 25% reduction annually due to generic competition. Sales data over the last three years:

Year Estimated Global Sales (USD millions) Notes
2020 112 Market erosion from generics
2021 84 Continued decline
2022 63 Further erosion, market saturation

Pricing Dynamics

Initial pricing at launch in 2010 was approximately USD 200 per 1 mg tablet. After patent expiry, average prices for generic conjugated estrogens dropped by over 60%. ORTHO-EST's price now hovers around USD 80 per 1 mg tablet in the US, with variability across regions.

R&D and Pipeline Considerations

No significant late-stage pipeline or reformulation efforts for ORTHO-EST are publicly documented. The focus has shifted toward alternative therapies outside of conjugated estrogens, such as bioidentical formulations and non-hormonal options.

Regulatory and Policy Impact

Increased scrutiny over HRT safety post-2002 Women’s Health Initiative (WHI) results has constrained overall market growth. Regulations favoring bioidentical hormones and compounded formulations, despite less regulatory oversight, further impact ORTHO-EST’s market share.

Future Outlook

The de facto standard for conjugated estrogens remains under pricing pressure, with expected further decline in revenue. Market growth prospects depend on:

  • Development of new formulations with improved safety profiles
  • Expansion into emerging markets with increasing menopausal populations
  • Regulatory changes favoring or restricting hormone therapy products

Projected revenue for ORTHO-EST is unlikely to recover beyond current levels unless it secures a new patent or reformulation that can command premium pricing.

Key Takeaways

  • Patent expiry in 2019 led to significant revenue erosion due to generic entry.
  • The global HRT market remains sizable, but competition has increased with bioidentical and compounded estrogens.
  • Prices for ORTHO-EST have declined by over 60% since patent expiration, influencing profit margins.
  • Future growth depends on regulatory environment, pipeline development, and market expansion opportunities.
  • Revenue projections suggest stabilization at lower levels unless strategic shifts occur.

FAQs

1. Why did ORTHO-EST lose market share after patent expiration?
Because generic conjugated estrogens entered the market, reducing prices and capturing a substantial part of the prescription volume.

2. What factors influence the future sales of ORTHO-EST?
Patent status, competitive pricing, regulatory policies, growth in hormone replacement therapy demand, and the development of new formulations.

3. How does the emergence of bioidentical hormones affect ORTHO-EST?
Bioidentical hormones offer alternative options that are perceived as safer, attracting patients and prescribers away from traditional conjugated estrogens like ORTHO-EST.

4. Are there any plans for reformulation or new indications for ORTHO-EST?
No publicly available information suggests ongoing R&D efforts or pipeline expansion for ORTHO-EST.

5. Which regions offer growth opportunities for estrogen therapies?
Emerging markets, such as Asia-Pacific and Latin America, show increasing demand due to aging populations, regulatory loosening, and rising healthcare access.

References

[1] Grand View Research. (2022). Hormone Replacement Therapy Market Size, Share & Trends. Retrieved from https://www.grandviewresearch.com/industry-analysis/hormone-replacement-therapy-market

[2] U.S. Food and Drug Administration. (2019). Labeling and patent information for conjugated estrogens. Retrieved from https://www.fda.gov

[3] IQVIA. (2022). Market Data and Insights on HRT Sector.

[4] Women’s Health Initiative. (2002). Findings on Hormone Therapy Risks.

[5] EvaluatePharma. (2021). Pharmaceutical Market Data.

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