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Details for Patent: 8,642,573

Which drugs does patent 8,642,573 protect, and when does it expire?

Patent 8,642,573 protects XIFAXAN and is included in one NDA.

This patent has thirty-two patent family members in eleven countries.

Summary for Patent: 8,642,573

Title:	Methods of treating hepatic encephalopathy
Abstract:	The application describes treatment of hepatic encephalopathy using gastrointestinal specific antibiotics. One example of a gastrointestinal specific antibiotic is rifaximin. The instant application also provides methods for determining if a subject has a neurological condition or hepatic encephalopathy by determining the critical flicker frequency and/or the venous ammonia level of the subject at two or more time points. The invention further provides methods for treating these subjects.
Inventor(s):	Forbes; William (Raleigh, NC), Merchant; Kunal (Durham, NC), Bortey; Enoch (Chapel Hill, NC), Shaw; Audrey (Durham, NC)
Assignee:	Salix Pharmaceuticals, Ltd (Raleigh, NC)
Application Number:	13/737,535
Patent Claim Types: see list of patent claims	Use;

Drugs Protected by US Patent 8,642,573

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Applicant	Tradename	Generic Name	Dosage	NDA	Approval Date	TE	Type	RLD	RS	Patent No.	Patent Expiration	Product	Substance	Delist Req.	Patented / Exclusive Use	Patent Submitted
Salix Pharms	XIFAXAN	rifaximin	TABLET;ORAL	022554-001	Mar 24, 2010		RX	Yes	Yes	➤ Sign Up	➤ Sign Up				REDUCTION IN RISK OF OVERT HEPATIC ENCEPHALOPATHY (HE) RECURRENCE	➤ Sign Up
Applicant	Tradename	Generic Name	Dosage	NDA	Approval Date	TE	Type	RLD	RS	Patent No.	Patent Expiration	Product	Substance	Delist Req.	Patented / Exclusive Use	Patent Submitted

Non-Orange Book US Patents Family Members for Patent 8,642,573

For Orange Book-listed patents (shown in the main table above) generic applications must certify that the listed patents are expired, invalid, or will not be infringed by generic entry.

The non-Orange Book patents listed below do not require formal certifications, so they do not automatically impede generic entry. Instead, they represent potential opportunities for branded firms to block generic entry through patent infringment challenges.

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Patent No.	Title	Estimated Patent Expiration
8,946,252	Methods of treating traveler's diarrhea and hepatic encephalopathy	➤ Sign Up
8,969,398	Methods of treating hepatic encephalopathy	➤ Sign Up
9,421,195	Methods of treating hepatic encephalopathy	➤ Sign Up
7,928,115	Methods of treating travelers diarrhea and hepatic encephalopathy	➤ Sign Up
Patent No.	Title	Estimated Patent Expiration

International Patents Family Members for US Patent 8,642,573

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Country	Document Number	Estimated Expiration	Supplementary Protection Certificate	SPC Country	SPC Expiration
Russian Federation	2571268	➤ Sign Up
Russian Federation	2012101310	➤ Sign Up
Russian Federation	2540513	➤ Sign Up
Russian Federation	2011154138	➤ Sign Up
Country	Document Number	Estimated Expiration	Supplementary Protection Certificate	SPC Country	SPC Expiration

Summary for Patent: 8,642,573

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