ISENTRESS HD Drug Patent Profile

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

Isentress Hd is a drug marketed by Msd Sub Merck and is included in one NDA. There are four patents protecting this drug and two Paragraph IV challenges.

The generic ingredient in ISENTRESS HD is raltegravir potassium. Five suppliers are listed for this compound. Additional details are available on the raltegravir potassium profile page.

DrugPatentWatch^® Litigation and Generic Entry Outlook for Isentress Hd

A generic version of ISENTRESS HD was approved as raltegravir potassium by LUPIN on May 6^th, 2025.

Summary for ISENTRESS HD

US Patents:	4
Applicants:	1
NDAs:	1
Patent Litigation and PTAB cases:	See patent lawsuits and PTAB cases for ISENTRESS HD

Paragraph IV (Patent) Challenges for ISENTRESS HD

Tradename	Dosage	Ingredient	Strength	NDA	ANDAs Submitted	Submissiondate
ISENTRESS HD	Tablets	raltegravir potassium	600 mg	022145	1	2022-10-21
ISENTRESS HD	Tablets	raltegravir potassium	400 mg	022145	1	2011-10-12

US Patents and Regulatory Information for ISENTRESS HD

ISENTRESS HD is protected by four US patents.

Applicant	Tradename	Generic Name	Dosage	NDA	Approval Date	TE	Type	RLD	RS	Patent No.	Patent Expiration	Product	Substance	Delist Req.	Exclusivity Expiration
Msd Sub Merck	ISENTRESS HD	raltegravir potassium	TABLET;ORAL	022145-002	May 26, 2017	AB	RX	Yes	Yes	8,771,733		Y	Y
Msd Sub Merck	ISENTRESS HD	raltegravir potassium	TABLET;ORAL	022145-002	May 26, 2017	AB	RX	Yes	Yes	7,754,731*PED				Y
Msd Sub Merck	ISENTRESS HD	raltegravir potassium	TABLET;ORAL	022145-002	May 26, 2017	AB	RX	Yes	Yes	10,772,888
Msd Sub Merck	ISENTRESS HD	raltegravir potassium	TABLET;ORAL	022145-002	May 26, 2017	AB	RX	Yes	Yes	9,649,311*PED				Y

International Patents for ISENTRESS HD

See the table below for patents covering ISENTRESS HD around the world.

Country	Patent Number	Title	Estimated Expiration
Austria	318140
Australia	2002334207
Brazil	0213522	compostos derivados de hidroxipirimidinona, composição farmacêutica, e, uso de um composto
Brazil	PI0213522	compostos derivados de hidroxipirimidinona, composição farmacêutica, e, uso de um composto
Canada	2463976	INHIBITEURS DE L'INTEGRASE DU VIH A BASE D'HYDROXYPYRIMIDINONE CARBOXAMIDE N-SUBSTITUE (N-SUBSTITUTED HYDROXYPYRIMIDINONE CARBOXAMIDE INHIBITORS OF HIV INTEGRASE)

Supplementary Protection Certificates for ISENTRESS HD

Patent Number	Supplementary Protection Certificate	SPC Country	SPC Expiration	SPC Description
1441735	DO 67; 3-2008	Slovakia		PRODUCT NAME: RALTEGRAVIR; REGISTRATION NO/DATE: Registration in Community EU/1/07/436/001-002 20071220; FORMER OWNER: ISTITUTO DI RICERCHE DI BIOLOGIA MOLECOLARE P. ANGELETTI SPA. IT
1441735	C 2008 008	Romania		PRODUCT NAME: N-(2-(4-(4-FLUOROBENZILCARBAMOIL)-5-HIDROXI-1-METIL-6-OXO-1,6-DIHIDROPIRIMIDIN-2-IL)PROPAN-2+IL)-5-METIL-1,3,4-OXADIAZOL-2-CARBOXAMIDA - RALTEGRAVIR SAU O SARE ACCEPTABILAFARMACEUTIC A ACESTUIA, INSPECIAL SAREA DE POTASIU; NATIONAL AUTHORISATION NUMBER: EMEA EU/1/07/436/001, EMEA EU/1/07/436/002; DATE OF NATIONAL AUTHORISATION: 20071220; NUMBER OF FIRST AUTHORISATION IN EUROPEAN ECONOMIC AREA (EEA): EMEA EU/1/07/436/001, EMEA EU/1/07/436/002; DATE OF FIRST AUTHORISATION IN EEA: 20071220
1441735	C01441735/01	Switzerland		FORMER OWNER: ISTITUTO DI RICERCHE DI BIOLOGIA MOLECOLARE P. ANGELETTI S.P.A., IT
1441735	SPC/GB08/020	United Kingdom		PRODUCT NAME: RALTEGRAVIR OR A PHARMACEUTICALLY ACCEPTABLE SALT THEREOF, ESPECIALLY THE POTASSIUM SALT; REGISTERED: UK EU/1/07/436/001 20080102
1441735	91428	Luxembourg		PRODUCT NAME: RALTEGRAVIR (ISENTRESS ); AUTHORISATION NUMBER AND DATE: EU/1/07/436/01 20080102