Last Updated: September 25, 2026

MENOSTAR Drug Patent Profile


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Which patents cover Menostar, and what generic alternatives are available?

Menostar is a drug marketed by Bayer Hlthcare and is included in one NDA.

The generic ingredient in MENOSTAR is estradiol. There is one drug master file entry for this compound. Forty-seven suppliers are listed for this compound. Additional details are available on the estradiol profile page.

DrugPatentWatch® Litigation and Generic Entry Outlook for Menostar

A generic version of MENOSTAR was approved as estradiol by BARR LABS INC on October 22nd, 1997.

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Summary for MENOSTAR
US Patents:0
Applicants:1
NDAs:1
Raw Ingredient (Bulk) Api Vendors: 94
Clinical Trials: 2
Patent Applications: 4,768
Drug Prices: Drug price information for MENOSTAR
What excipients (inactive ingredients) are in MENOSTAR?MENOSTAR excipients list
DailyMed Link:MENOSTAR at DailyMed
Recent Clinical Trials for MENOSTAR

Identify potential brand extensions & 505(b)(2) entrants

SponsorPhase
BayerPhase 3

See all MENOSTAR clinical trials

Pharmacology for MENOSTAR
Drug ClassEstrogen
Mechanism of ActionEstrogen Receptor Agonists

US Patents and Regulatory Information for MENOSTAR

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Bayer Hlthcare MENOSTAR estradiol SYSTEM;TRANSDERMAL 021674-001 Jun 8, 2004 AB 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

Expired US Patents for MENOSTAR

Applicant Tradename Generic Name Dosage NDA Approval Date Patent No. Patent Expiration
Bayer Hlthcare MENOSTAR estradiol SYSTEM;TRANSDERMAL 021674-001 Jun 8, 2004 ⤷  Start Trial ⤷  Start Trial
Bayer Hlthcare MENOSTAR estradiol SYSTEM;TRANSDERMAL 021674-001 Jun 8, 2004 ⤷  Start Trial ⤷  Start Trial
Bayer Hlthcare MENOSTAR estradiol SYSTEM;TRANSDERMAL 021674-001 Jun 8, 2004 ⤷  Start Trial ⤷  Start Trial
>Applicant >Tradename >Generic Name >Dosage >NDA >Approval Date >Patent No. >Patent Expiration

Supplementary Protection Certificates for MENOSTAR

Patent Number Supplementary Protection Certificate SPC Country SPC Expiration SPC Description
0136011 C00136011/03 Switzerland ⤷  Start Trial PRODUCT NMAE: ESTRADIOL UND MEDROXYPROGESTERONACETAT; REGISTRATION NO/DATE: IKS 55288 20000417
0136011 2000C/027 Belgium ⤷  Start Trial PRODUCT NAME: ETHINYLESTRADIOLUM / NORETHISTERONI ACETAS; NAT. REGISTRATION NO/DATE: 19 IS 106 F3 20000911; FIRST REGISTRATION: NL RVG 23909 19991124
0136011 99C0003 Belgium ⤷  Start Trial PRODUCT NAME: ESTRADIOL AND NORETHISTERONE; FIRST REGISTRATION NO/DATE: 403 IS 106 F3 19980928; FIRST REGISTRATION: SE 14007 19980306
0584952 99C0004 Belgium ⤷  Start Trial PRODUCT NAME: ESTRADIOL, HEMIHYDRATE, NORETHISTERONE, ACETATE; NAT. REGISTRATION NO/DATE: NL 23753 19981210; FIRST REGISTRATION: SE - 14 007 19980306
0398460 SPC/GB04/032 United Kingdom ⤷  Start Trial PRODUCT NAME: ESTRADIOL, OPTIONALLY IN THE FORM OF A HYDRATE, TOGETHER WITH DROSPIRENONE; REGISTERED: NL RVG 27505 20021211; UK PL 00053/0341 20040310
>Patent Number >Supplementary Protection Certificate >SPC Country >SPC Expiration >SPC Description

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