small molecule

XIFAXAN

RIFAXIMIN

Loss of exclusivityOctober 2029latest FDA-listed patent expiry
CompanySalix PharmaceuticalsSee this company's full patent-cliff portfolio

Drug detail

Brand nameXIFAXAN
Active ingredientRIFAXIMIN
Strength550MG
Dosage formTABLET
RouteORAL
ModalitySmall molecule
FDA approvalMarch 2010
Marketing statusRX

Listed patents

PatentExpiresType
8642573October 2029use U-1481
8969398October 2029use U-1481
10709694July 2029use U-2579
8829017July 2029use U-1562
9421195July 2029use U-1481
8946252July 2029use U-1481
10335397July 2029use U-2579
9629828July 2029use U-1994
10314828July 2029use U-1481
8309569July 2029use U-1707
11564912February 2029use U-3512
10456384February 2029use U-2644
11779571February 2029use U-3706
10765667February 2029use U-2643
8193196September 2027substance, product
10703763February 2026use U-1708
8741904February 2026substance, product
8518949February 2026product
9271968February 2026product

Source: FDA Orange Book, layered on the CliffBio company graph. Cliff dates are the latest FDA-listed patent expiry; estimates are projections, not legal advice.

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