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Last Updated: March 19, 2026

NORETHIN 1 Drug Patent Profile

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When do Norethin 1 patents expire, and what generic alternatives are available?

Norethin 1 is a drug marketed by Watson Pharms Teva, Watson Labs, and Heritage Pharma. and is included in four NDAs.

The generic ingredient in NORETHIN 1 is mestranol; norethindrone. There are eleven drug master file entries for this compound. Additional details are available on the mestranol; norethindrone profile page.

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Summary for NORETHIN 1

US Patents:	0
Applicants:	3
NDAs:	4

US Patents and Regulatory Information for NORETHIN 1

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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
Watson Pharms Teva	NORETHIN 1/35E-21	ethinyl estradiol; norethindrone	TABLET;ORAL-21	071480-001	Apr 12, 1988		DISCN	No	No	⤷ Get Started Free	⤷ Get Started Free				⤷ Get Started Free
Heritage Pharma	NORETHIN 1/50M-28	mestranol; norethindrone	TABLET;ORAL-28	071540-001	Apr 12, 1988		DISCN	No	No	⤷ Get Started Free	⤷ Get Started Free				⤷ Get Started Free
Watson Labs	NORETHIN 1/35E-28	ethinyl estradiol; norethindrone	TABLET;ORAL-28	071481-001	Apr 12, 1988		DISCN	No	No	⤷ Get Started Free	⤷ Get Started Free				⤷ Get Started Free
Heritage Pharma	NORETHIN 1/50M-21	mestranol; norethindrone	TABLET;ORAL-21	071539-001	Apr 12, 1988		DISCN	No	No	⤷ Get Started Free	⤷ Get Started Free				⤷ Get Started Free
>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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