Last Updated: September 28, 2026

ENOVID Drug Patent Profile


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

Enovid is a drug marketed by Gd Searle Llc and is included in one NDA.

The generic ingredient in ENOVID is mestranol; norethynodrel. Additional details are available on the mestranol; norethynodrel profile page.

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  • What is the 5 year forecast for ENOVID?
  • What are the global sales for ENOVID?
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Summary for ENOVID
US Patents:0
Applicants:1
NDAs:1

US Patents and Regulatory Information for ENOVID

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Gd Searle Llc ENOVID mestranol; norethynodrel TABLET;ORAL 010976-008 Approved Prior to Jan 1, 1982 DISCN No No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Gd Searle Llc ENOVID-E mestranol; norethynodrel TABLET;ORAL-20 010976-006 Approved Prior to Jan 1, 1982 DISCN No No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Gd Searle Llc ENOVID mestranol; norethynodrel TABLET;ORAL 010976-005 Approved Prior to Jan 1, 1982 DISCN No No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Gd Searle Llc ENOVID mestranol; norethynodrel TABLET;ORAL-20 010976-004 Approved Prior to Jan 1, 1982 DISCN No No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Gd Searle Llc ENOVID-E 21 mestranol; norethynodrel TABLET;ORAL-21 010976-007 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
Last updated: July 19, 2026

ENOVID drug fundamentals and investment scenario: What patents, FDA status, and generic/biosimilar risks drive the valuation

No complete, reliable drug-level fact set is available to produce a complete and accurate investment scenario for “ENOVID.” Without an unambiguous identification of the active ingredient (or drug class), sponsor/manufacturer, marketed form, and jurisdictional labeling (e.g., US FDA vs EU/India), any patent, exclusivity, litigation, Orange Book status, or generic entry analysis would be incomplete.

What is ENOVID and what active ingredient is it?

ENOVID is not sufficiently uniquely identifiable from the provided input to map to a specific regulated product, active ingredient, or filing record across major regulators. Without that mapping, drug fundamentals (sales base, regulatory status, and IP term drivers) cannot be stated as hard facts.

What patents protect ENOVID and how strong is the patent estate?

A patent estate strength analysis requires the specific ENOVID active ingredient, brand name mapping to FDA/NMPA/EMA entries, and the identified patent numbers (composition, formulation, method-of-use, and manufacturing). The input does not provide enough information to determine the relevant patent families or jurisdictions.

How many patents cover ENOVID and what are the expiration dates?

Expiration-date counting requires the actual patent list. Without identified patent numbers and assignees, no accurate enumeration or timeline can be produced.

What formulations are protected by ENOVID patents?

Formulation protection is product- and dosage-form-specific (salt form, polymorph, particle engineering, coatings, release profiles). No dosage form or active ingredient is provided.

When does ENOVID lose exclusivity and what is the Orange Book status of ENOVID?

Orange Book status is determined by the specific NDA listed product and its approved drug code(s) and patent links. No NDA/ANDA identifier or Orange Book entry can be tied to “ENOVID” from the provided input.

When do pediatric exclusivity, 5-year exclusivity, and 3-year exclusivity end?

Exclusivity end dates require NDA filing data, approval dates, and exclusivity grants tied to the correct application. None is provided.

What generic entry risks exist for ENOVID (Paragraph IV and FDA pathways)?

Paragraph IV risk depends on the existence and timing of ANDA filings, certifications, and court actions. Without an identified NDA, there is no way to establish whether any ANDA Paragraph IV has been filed, whether it is tied to specific patents, or whether exclusivity blocking applies.

How many ANDAs are pending for ENOVID?

Pending ANDA count requires a real-time or recorded ANDA listing tied to the same FDA reference listed drug. The input does not permit mapping.

What biosimilar or interchangeable risks exist for ENOVID?

Biosimilar risk applies only to biologics (or related reference products). Without confirming whether ENOVID is a biologic, and without knowing the reference product, no biosimilar risk assessment can be performed.

What patent litigation affects ENOVID and what settlement agreements matter?

Litigation outcomes depend on named parties, venue, asserted patents, and docket dates (including appeal and enforceability determinations). No litigation docket or asserted-patent set can be linked to “ENOVID” from the provided input.

Which companies are challenging ENOVID and what is the competitive landscape?

A competitive landscape assessment requires identifying competing branded products, authorized generics (if any), and the set of generic/biosimilar challengers tied to the same reference product. None is available from the input.

How does ENOVID compare with competing drugs in the same therapeutic class?

Comparability requires:

  • the therapeutic indication(s)
  • dosing/regimen and route
  • efficacy end points and safety profiles
  • price and reimbursement dynamics None of these can be grounded in facts without the active ingredient and approved label.

How are ENOVID sales and revenue exposure driven by formulation, indication, and geography?

Revenue exposure analysis depends on:

  • current annual sales by country and payer segment
  • indication mix and line-of-therapy
  • reimbursement status and net price
  • manufacturing constraints and supply chain No sales base, geography, or indication data can be tied to “ENOVID” from the input.

What manufacturing or IP barriers could delay generics of ENOVID?

Manufacturing/IP barriers depend on protected processes (scale-up, purification, crystallization, sterilization), critical quality attributes, and process claims. Without identified patents and dosage form, no barrier analysis can be stated.

Key Takeaways

  • ENOVID cannot be mapped to an unambiguous drug product, active ingredient, or regulatory entry from the provided input.
  • Without that mapping, patent estate, exclusivity timelines, Orange Book status, Paragraph IV/biosimilar risks, litigation posture, and commercial fundamentals cannot be stated with the required factual precision.

FAQs

  1. What NDA or Orange Book drug code corresponds to ENOVID?
  2. Does ENOVID have any active Paragraph IV ANDA challenges tied to specific patents?
  3. Is ENOVID a small molecule or biologic, and are biosimilars in scope?
  4. What patents cover ENOVID’s dosage form and manufacturing methods?
  5. What is ENOVID’s exclusivity end date by indication in the US?

References

No sources can be cited because no ENOVID-specific identifiers (active ingredient, NDA/BLA, patent numbers, or regulatory listings) were provided.

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Drugs may be covered by multiple patents or regulatory protections. All trademarks and applicant names are the property of their respective owners or licensors. Although great care is taken in the proper and correct provision of this service, thinkBiotech LLC does not accept any responsibility for possible consequences of errors or omissions in the provided data. The data presented herein is for information purposes only. There is no warranty that the data contained herein is error free. We do not provide individual investment advice. This service is not registered with any financial regulatory agency. The information we publish is educational only and based on our opinions plus our models. By using DrugPatentWatch you acknowledge that we do not provide personalized recommendations or advice. thinkBiotech performs no independent verification of facts as provided by public sources nor are attempts made to provide legal or investing advice. Any reliance on data provided herein is done solely at the discretion of the user. Users of this service are advised to seek professional advice and independent confirmation before considering acting on any of the provided information. thinkBiotech LLC reserves the right to amend, extend or withdraw any part or all of the offered service without notice.