Last Updated: August 15, 2026

DUETACT Drug Patent Profile


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

Duetact is a drug marketed by Takeda Pharms Usa and is included in one NDA. There are two patents protecting this drug and one Paragraph IV challenge.

This drug has fifty-nine patent family members in thirty-one countries.

The generic ingredient in DUETACT is glimepiride; pioglitazone hydrochloride. There are sixteen drug master file entries for this compound. Two suppliers are listed for this compound. Additional details are available on the glimepiride; pioglitazone hydrochloride profile page.

DrugPatentWatch® Generic Entry Outlook for Duetact

There is one Paragraph IV patent challenge for this drug. This may lead to patent invalidation or a license for generic production.

Indicators of Generic Entry

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Summary for DUETACT
International Patents:59
US Patents:2
Applicants:1
NDAs:1
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for DUETACT
Paragraph IV (Patent) Challenges for DUETACT
Tradename Dosage Ingredient Strength NDA ANDAs Submitted Submissiondate
DUETACT Tablets glimepiride; pioglitazone hydrochloride 30 mg/2 mg and 30 mg/4 mg 021925 1 2009-12-22

US Patents and Regulatory Information for DUETACT

DUETACT is protected by two US patents.

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Takeda Pharms Usa DUETACT glimepiride; pioglitazone hydrochloride TABLET;ORAL 021925-001 Jul 28, 2006 AB RX Yes Yes ⤷  Start Trial ⤷  Start Trial Y ⤷  Start Trial
Takeda Pharms Usa DUETACT glimepiride; pioglitazone hydrochloride TABLET;ORAL 021925-002 Jul 28, 2006 AB RX Yes No ⤷  Start Trial ⤷  Start Trial Y ⤷  Start Trial
Takeda Pharms Usa DUETACT glimepiride; pioglitazone hydrochloride TABLET;ORAL 021925-001 Jul 28, 2006 AB RX Yes Yes ⤷  Start Trial ⤷  Start Trial Y ⤷  Start Trial
Takeda Pharms Usa DUETACT glimepiride; pioglitazone hydrochloride TABLET;ORAL 021925-002 Jul 28, 2006 AB RX Yes No ⤷  Start Trial ⤷  Start Trial Y ⤷  Start Trial
>Applicant >Tradename >Generic Name >Dosage >NDA >Approval Date >TE >Type >RLD >RS >Patent No. >Patent Expiration >Product >Substance >Delist Req. >Exclusivity Expiration

International Patents for DUETACT

See the table below for patents covering DUETACT around the world.

Country Patent Number Title Estimated Expiration
Argentina 240698 PROCEDIMIENTO PARA PREPARAR COMPUESTOS DE 5-(4-(2-(5-ETIL-2-PIRIDIL)-ETOXI)BENZIL)-2,4-TIAZOLIDINDIONA Y SUS SALES (PROCESS FOR THE PREPARATION OF 5-(4-(2-(5-ETHYL-2-PYRIDIL)-ETHOXY)BENZYL)-2,4-THIAZOLODINEDIONE AND THEIR SALTS) ⤷  Start Trial
Austria 41931 ⤷  Start Trial
Australia 5246786 ⤷  Start Trial
Australia 572719 ⤷  Start Trial
Brazil 1100325 ⤷  Start Trial
Canada 1277323 DERIVES DE THIAZOLIDINEDIONE, LEUR PRODUCTION ET LEUR EMPLOI (THIAZOLIDINEDIONE DERIVATIVES, THEIR PRODUCTION AND USE) ⤷  Start Trial
China 1003934 ⤷  Start Trial
>Country >Patent Number >Title >Estimated Expiration

Supplementary Protection Certificates for DUETACT

Patent Number Supplementary Protection Certificate SPC Country SPC Expiration SPC Description
0193256 C300038 Netherlands ⤷  Start Trial PRODUCT NAME: PIOGLITAZON, DESGEWENST IN DE VORM VAN EEN FARMACOLOGISCH AANVAARDBAAR ZOUT, IN HET BIJZONDER HET HYDROCHLORIDE; REGISTRATION NO/DATE: EU/1/00/151/001 - EU/1/00/151/006 20001011
0861666 CA 2007 00001 Denmark ⤷  Start Trial
0861666 300258 Netherlands ⤷  Start Trial 300258, 20160620, EXPIRES: 20210619
1174135 437 Finland ⤷  Start Trial
1174135 CA 2009 00045 Denmark ⤷  Start Trial
0861666 SPC 038/2006 Ireland ⤷  Start Trial SPC 038/2006: 20070528, EXPIRES: 20210619
0861666 C00861666/01 Switzerland ⤷  Start Trial FORMER REPRESENTATIVE: BOHEST AG, CH
>Patent Number >Supplementary Protection Certificate >SPC Country >SPC Expiration >SPC Description

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