Last Updated: August 11, 2026

Mechanism of Action: Xanthine Oxidase Inhibitors

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Drugs with Mechanism of Action: Xanthine Oxidase Inhibitors

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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
Takeda Pharms Usa	ULORIC	febuxostat	TABLET;ORAL	021856-001	Feb 13, 2009	AB	RX	Yes	No	8,372,872	⤷ Start Trial				⤷ Start Trial
Takeda Pharms Usa	ULORIC	febuxostat	TABLET;ORAL	021856-002	Feb 13, 2009	AB	RX	Yes	Yes	8,372,872	⤷ Start Trial				⤷ Start Trial
Takeda Pharms Usa	ULORIC	febuxostat	TABLET;ORAL	021856-002	Feb 13, 2009	AB	RX	Yes	Yes	9,107,912	⤷ Start Trial				⤷ Start Trial
Takeda Pharms Usa	ULORIC	febuxostat	TABLET;ORAL	021856-001	Feb 13, 2009	AB	RX	Yes	No	9,107,912	⤷ Start Trial				⤷ Start Trial
Dr Reddys	LOPURIN	allopurinol	TABLET;ORAL	071586-001	Apr 2, 1987	AB	RX	No	No	⤷ Start Trial	⤷ Start Trial				⤷ Start Trial
Dr Reddys	LOPURIN	allopurinol	TABLET;ORAL	071587-001	Apr 2, 1987	AB	RX	No	No	⤷ Start Trial	⤷ Start Trial				⤷ Start Trial
>Applicant	>Tradename	>Generic Name	>Dosage	>NDA	>Approval Date	>TE	>Type	>RLD	>RS	>Patent No.	>Patent Expiration	>Product	>Substance	>Delist Req.	>Exclusivity Expiration

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