Last Updated: August 10, 2026

HETLIOZ LQ Drug Patent Profile


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

Hetlioz Lq is a drug marketed by Vanda Pharms Inc and is included in one NDA. There are twenty-seven patents protecting this drug and one Paragraph IV challenge.

This drug has two hundred and fifteen patent family members in twenty-four countries.

The generic ingredient in HETLIOZ LQ is tasimelteon. There are three drug master file entries for this compound. Four suppliers are listed for this compound. Additional details are available on the tasimelteon profile page.

DrugPatentWatch® Litigation and Generic Entry Outlook for Hetlioz Lq

A generic version of HETLIOZ LQ was approved as tasimelteon by TEVA PHARMS USA INC on December 12th, 2022.

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Recent Clinical Trials for HETLIOZ LQ

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

SponsorPhase
Vanda PharmaceuticalsPhase 1
Vanda PharmaceuticalsPhase 4

See all HETLIOZ LQ clinical trials

Pharmacology for HETLIOZ LQ
Paragraph IV (Patent) Challenges for HETLIOZ LQ
Tradename Dosage Ingredient Strength NDA ANDAs Submitted Submissiondate
HETLIOZ LQ Oral Suspension tasimelteon 4 mg/mL 214517 1 2024-04-01

US Patents and Regulatory Information for HETLIOZ LQ

HETLIOZ LQ is protected by twenty-seven US patents and one FDA Regulatory Exclusivity.

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Vanda Pharms Inc HETLIOZ LQ tasimelteon SUSPENSION;ORAL 214517-001 Dec 1, 2020 RX Yes Yes ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Vanda Pharms Inc HETLIOZ LQ tasimelteon SUSPENSION;ORAL 214517-001 Dec 1, 2020 RX Yes Yes ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Vanda Pharms Inc HETLIOZ LQ tasimelteon SUSPENSION;ORAL 214517-001 Dec 1, 2020 RX Yes Yes ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Vanda Pharms Inc HETLIOZ LQ tasimelteon SUSPENSION;ORAL 214517-001 Dec 1, 2020 RX Yes Yes ⤷  Start Trial ⤷  Start Trial Y Y ⤷  Start Trial
Vanda Pharms Inc HETLIOZ LQ tasimelteon SUSPENSION;ORAL 214517-001 Dec 1, 2020 RX Yes Yes ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Vanda Pharms Inc HETLIOZ LQ tasimelteon SUSPENSION;ORAL 214517-001 Dec 1, 2020 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

EU/EMA Drug Approvals for HETLIOZ LQ

Company Drugname Inn Product Number / Indication Status Generic Biosimilar Orphan Marketing Authorisation Marketing Refusal
Vanda Pharmaceuticals Netherlands B.V. Hetlioz tasimelteon EMEA/H/C/003870Hetlioz is indicated for the treatment of Non-24-Hour Sleep-Wake Disorder (Non-24) in totally blind adults., Authorised no no yes 2015-07-03
>Company >Drugname >Inn >Product Number / Indication >Status >Generic >Biosimilar >Orphan >Marketing Authorisation >Marketing Refusal

International Patents for HETLIOZ LQ

When does loss-of-exclusivity occur for HETLIOZ LQ?

Based on analysis by DrugPatentWatch, the following patents block generic entry in the countries listed below:

Australia

Patent: 20400065
Estimated Expiration: ⤷  Start Trial

Patent: 25205489
Estimated Expiration: ⤷  Start Trial

Patent: 26202446
Estimated Expiration: ⤷  Start Trial

Canada

Patent: 61975
Estimated Expiration: ⤷  Start Trial

Chile

Patent: 22001546
Estimated Expiration: ⤷  Start Trial

China

Patent: 4727978
Estimated Expiration: ⤷  Start Trial

Colombia

Patent: 22009691
Estimated Expiration: ⤷  Start Trial

European Patent Office

Patent: 72542
Estimated Expiration: ⤷  Start Trial

Israel

Patent: 2492
Estimated Expiration: ⤷  Start Trial

Patent: 7244
Estimated Expiration: ⤷  Start Trial

Japan

Patent: 03632
Estimated Expiration: ⤷  Start Trial

Patent: 75899
Estimated Expiration: ⤷  Start Trial

Patent: 23506225
Estimated Expiration: ⤷  Start Trial

Patent: 24084859
Estimated Expiration: ⤷  Start Trial

Patent: 26117039
Patent: 液体タシメルテオン製剤及びそれを使用する方法
Estimated Expiration: ⤷  Start Trial

Mexico

Patent: 22006577
Patent: FORMULACIONES LIQUIDAS DE TASIMELTEON Y METODOS PARA SU USO. (LIQUID TASIMELTEON FORMULATIONS AND METHODS OF USE THEREOF.)
Estimated Expiration: ⤷  Start Trial

Patent: 26003536
Patent: FORMULACIONES LIQUIDAS DE TASIMELTEON Y METODOS PARA SU USO. (LIQUID TASIMELTEON FORMULATIONS AND METHODS OF USE THEREOF)
Estimated Expiration: ⤷  Start Trial

New Zealand

Patent: 9270
Patent: Liquid tasimelteon formulations and methods of use thereof
Estimated Expiration: ⤷  Start Trial

Patent: 1345
Patent: Liquid tasimelteon formulations and methods of use thereof
Estimated Expiration: ⤷  Start Trial

Patent: 1397
Patent: Liquid tasimelteon formulations and methods of use thereof
Estimated Expiration: ⤷  Start Trial

South Africa

Patent: 2207188
Patent: LIQUID TASIMELTEON FORMULATIONS AND METHODS OF USE THEREOF
Estimated Expiration: ⤷  Start Trial

South Korea

Patent: 2650321
Estimated Expiration: ⤷  Start Trial

Patent: 220113983
Patent: 액체 타시멜테온 제형 및 이의 사용 방법
Estimated Expiration: ⤷  Start Trial

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

See the table below for additional patents covering HETLIOZ LQ around the world.

Country Patent Number Title Estimated Expiration
European Patent Office 3105212 TASIMELTÉON DE QUALITÉ PHARMACEUTIQUE, HAUTEMENT PURIFIÉ (HIGHLY PURIFIED PHARMACEUTICAL GRADE TASIMELTEON) ⤷  Start Trial
European Patent Office 3470405 TASIMELTEON DE QUALITÉ PHARMACEUTIQUE HAUTEMENT PURIFIÉE (HIGHLY PURIFIED PHARMACEUTICAL GRADE TASIMELTEON) ⤷  Start Trial
European Patent Office 4223747 TASIMELTEON DE QUALITÉ PHARMACEUTIQUE HAUTEMENT PURIFIÉ (HIGHLY PURIFIED PHARMACEUTICAL GRADE TASIMELTEON) ⤷  Start Trial
Japan 2017506642 高純度医薬品等級タシメルテオン ⤷  Start Trial
Japan 2020079248 高純度医薬品等級タシメルテオン (HIGHLY PURIFIED PHARMACEUTICAL GRADE TASIMELTEON) ⤷  Start Trial
Japan 2022088624 高純度医薬品等級タシメルテオン ⤷  Start Trial
>Country >Patent Number >Title >Estimated Expiration

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