RIFAXIMIN - Generic Drug Details

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What are the generic drug sources for rifaximin and what is the scope of patent protection?

Rifaximin is the generic ingredient in one branded drug marketed by Salix Pharms and is included in one NDA. There are twenty-nine patents protecting this compound and two Paragraph IV challenges. Additional information is available in the individual branded drug profile pages.

Rifaximin has two hundred and sixteen patent family members in forty countries.

There are fourteen drug master file entries for rifaximin. Three suppliers are listed for this compound. There are two tentative approvals for this compound.

Summary for RIFAXIMIN

International Patents:	216
US Patents:	29
Tradenames:	1
Applicants:	1
NDAs:	1
Drug Master File Entries:	14
Finished Product Suppliers / Packagers:	3
Raw Ingredient (Bulk) Api Vendors:	55
Clinical Trials:	172
Patent Applications:	6,767
Patent Litigation and PTAB cases:	See patent lawsuits and PTAB cases for RIFAXIMIN
What excipients (inactive ingredients) are in RIFAXIMIN?	RIFAXIMIN excipients list
DailyMed Link:	RIFAXIMIN at DailyMed

DrugPatentWatch^® Estimated Loss of Exclusivity (LOE) Date for RIFAXIMIN

Generic Entry Dates for RIFAXIMIN^: ⤷ Sign Up* Constraining patent/regulatory exclusivity: ⤷ Sign Up Dosage: TABLET;ORAL
Generic Entry Dates for RIFAXIMIN^: ⤷ Sign Up* Constraining patent/regulatory exclusivity: ⤷ Sign Up Dosage: TABLET;ORAL

^*The generic entry opportunity date is the latter of the last compound-claiming patent and the last regulatory exclusivity protection. Many factors can influence early or later generic entry. This date is provided as a rough estimate of generic entry potential and should not be used as an independent source.

Recent Clinical Trials for RIFAXIMIN

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

Sponsor	Phase
Tata Memorial Centre	Phase 2
Al-Azhar University	Phase 2
Xin Zeng	N/A

See all RIFAXIMIN clinical trials

Generic filers with tentative approvals for RIFAXIMIN

Applicant	Application No.	Strength	Dosage Form
⤷ Sign Up	⤷ Sign Up	550MG	TABLET;ORAL
⤷ Sign Up	⤷ Sign Up	550MG	TABLET;ORAL

The 'tentative' approval signifies that the product meets all FDA standards for marketing, and, but for the patents / regulatory protections, it would approved.

Pharmacology for RIFAXIMIN

Drug Class	Rifamycin Antibacterial

Anatomical Therapeutic Chemical (ATC) Classes for RIFAXIMIN

A07AA	Antibiotics
A07A	INTESTINAL ANTIINFECTIVES
A07	ANTIDIARRHEALS, INTESTINAL ANTIINFLAMMATORY/ANTIINFECTIVE AGENTS
A	Alimentary tract and metabolism

D06AX	Other antibiotics for topical use
D06A	ANTIBIOTICS FOR TOPICAL USE
D06	ANTIBIOTICS AND CHEMOTHERAPEUTICS FOR DERMATOLOGICAL USE
D	Dermatologicals

Paragraph IV (Patent) Challenges for RIFAXIMIN

Tradename	Dosage	Ingredient	Strength	NDA	ANDAs Submitted	Submissiondate
XIFAXAN	Tablets	rifaximin	200 mg	021361	1	2019-01-28
XIFAXAN	Tablets	rifaximin	550 mg	021361	1	2015-12-18

US Patents and Regulatory Information for RIFAXIMIN

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Glossary

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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
Salix Pharms	XIFAXAN	rifaximin	TABLET;ORAL	021361-001	May 25, 2004		RX	Yes	Yes	⤷ Sign Up	⤷ Sign Up	Y	Y		⤷ Sign Up
Salix Pharms	XIFAXAN	rifaximin	TABLET;ORAL	021361-002	Mar 24, 2010		RX	Yes	Yes	⤷ Sign Up	⤷ Sign Up	Y	Y		⤷ Sign Up
Salix Pharms	XIFAXAN	rifaximin	TABLET;ORAL	021361-002	Mar 24, 2010		RX	Yes	Yes	⤷ Sign Up	⤷ Sign Up	Y			⤷ Sign Up
Salix Pharms	XIFAXAN	rifaximin	TABLET;ORAL	021361-002	Mar 24, 2010		RX	Yes	Yes	⤷ Sign Up	⤷ Sign Up				⤷ Sign Up
>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 RIFAXIMIN

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Applicant	Tradename	Generic Name	Dosage	NDA	Approval Date	Patent No.	Patent Expiration
Salix Pharms	XIFAXAN	rifaximin	TABLET;ORAL	021361-002	Mar 24, 2010	⤷ Sign Up	⤷ Sign Up
Salix Pharms	XIFAXAN	rifaximin	TABLET;ORAL	021361-001	May 25, 2004	⤷ Sign Up	⤷ Sign Up
Salix Pharms	XIFAXAN	rifaximin	TABLET;ORAL	021361-002	Mar 24, 2010	⤷ Sign Up	⤷ Sign Up
Salix Pharms	XIFAXAN	rifaximin	TABLET;ORAL	021361-002	Mar 24, 2010	⤷ Sign Up	⤷ Sign Up
>Applicant	>Tradename	>Generic Name	>Dosage	>NDA	>Approval Date	>Patent No.	>Patent Expiration

International Patents for RIFAXIMIN

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Country	Patent Number	Title	Estimated Expiration
China	101260114	Polymorphous forms of rifaximin, preparation and application thereof used in pharmaceutical preparation	⤷ Sign Up
Austria	E361927		⤷ Sign Up
Mexico	2007010742	NUEVAS FORMAS POLIMORFAS DE RIFAXIMINA, PROCEDIMIENTOS PARA SU PRODUCCION Y USO DE LA MISMA EN PREPARACIONES MEDICINALES. (NEW POLYMORPHOUS FORMS OF RIFAXIMIN, PROCESSES FOR THEIR PRODUCTION AND USE THEREOF IN THE MEDICINAL.)	⤷ Sign Up
Japan	2011057698	POLYMORPHOUS FORM OF RIFAXIMIN, PRODUCTION METHOD THEREFOR AND USE THEREOF IN MEDICAL PREPARATION	⤷ Sign Up
>Country	>Patent Number	>Title	>Estimated Expiration

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Drugs may be covered by multiple patents or regulatory protections. All trademarks and applicant names are the property of their respective owners or licensors. Although great care is taken in the proper and correct provision of this service, thinkBiotech LLC does not accept any responsibility for possible consequences of errors or omissions in the provided data. The data presented herein is for information purposes only. There is no warranty that the data contained herein is error free. thinkBiotech performs no independent verification of facts as provided by public sources nor are attempts made to provide legal or investing advice. Any reliance on data provided herein is done solely at the discretion of the user. Users of this service are advised to seek professional advice and independent confirmation before considering acting on any of the provided information. thinkBiotech LLC reserves the right to amend, extend or withdraw any part or all of the offered service without notice.