Last Updated: September 28, 2026

GWYN LO Drug Patent Profile

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

Gwyn Lo is a drug marketed by Viatris Specialty and is included in one NDA.

The generic ingredient in GWYN LO is ethinyl estradiol; norelgestromin. Eight suppliers are listed for this compound. Additional details are available on the ethinyl estradiol; norelgestromin profile page.

DrugPatentWatch^® Litigation and Generic Entry Outlook for Gwyn Lo

A generic version of GWYN LO was approved as ethinyl estradiol; norelgestromin by AMNEAL on February 25^th, 2021.

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Summary for GWYN LO

US Patents:	0
Applicants:	1
NDAs:	1

US Patents and Regulatory Information for GWYN LO

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Glossary

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Applicant	Tradename	Generic Name	Dosage	NDA	Approval Date	TE	Type	RLD	RS	Patent No.	Patent Expiration	Product	Substance	Delist Req.	Exclusivity Expiration
Viatris Specialty	GWYN LO	ethinyl estradiol; norelgestromin	SYSTEM;TRANSDERMAL	219990-001	Jul 28, 2026		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

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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.