Last Updated: August 16, 2026

IWILFIN Drug Patent Profile


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When do Iwilfin patents expire, and when can generic versions of Iwilfin launch?

Iwilfin is a drug marketed by Uswm and is included in one NDA. There is one patent protecting this drug.

This drug has five patent family members in five countries.

The generic ingredient in IWILFIN is eflornithine hydrochloride. There are two drug master file entries for this compound. One supplier is listed for this compound. Additional details are available on the eflornithine hydrochloride profile page.

DrugPatentWatch® Generic Entry Outlook for Iwilfin

By analyzing the patents and regulatory protections it appears that the earliest date for generic entry will be December 13, 2030. This may change due to patent challenges or generic licensing.

Indicators of Generic Entry

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Summary for IWILFIN
International Patents:5
US Patents:1
Applicants:1
NDAs:1

US Patents and Regulatory Information for IWILFIN

IWILFIN is protected by one US patents and two FDA Regulatory Exclusivities.

Based on analysis by DrugPatentWatch, the earliest date for a generic version of IWILFIN is ⤷  Start Trial.

This potential generic entry date is based on TO REDUCE THE RISK OF RELAPSE IN ADULT AND PEDIATRIC PATIENTS WITH HIGH-RISK NEUROBLASTOMA (HRNB) WHO HAVE DEMONSTRATED AT LEAST A PARTIAL RESPONSE TO PRIOR MULTIAGENT, MULTIMODALITY THERAPY INCLUDING ANTI-GD2 IMMUNOTHERAPY.

Generics may enter earlier, or later, based on new patent filings, patent extensions, patent invalidation, early generic licensing, generic entry preferences, and other factors.

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Uswm IWILFIN eflornithine hydrochloride TABLET;ORAL 215500-001 Dec 13, 2023 RX Yes Yes ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Uswm IWILFIN eflornithine hydrochloride TABLET;ORAL 215500-001 Dec 13, 2023 RX Yes Yes ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Uswm IWILFIN eflornithine hydrochloride TABLET;ORAL 215500-001 Dec 13, 2023 RX Yes Yes ⤷  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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