Last Updated: September 24, 2026

SELENIOUS ACID Drug Patent Profile


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Which patents cover Selenious Acid, and when can generic versions of Selenious Acid launch?

Selenious Acid is a drug marketed by Am Regent, Aspiro, Cipla, Fresenius Kabi Usa, Gland, Kindos, Stira, Sun Pharm, and Zydus Pharms. and is included in nine NDAs. There are two patents protecting this drug and one Paragraph IV challenge.

The generic ingredient in SELENIOUS ACID is selenious acid. There is one drug master file entry for this compound. Two suppliers are listed for this compound. Additional details are available on the selenious acid profile page.

DrugPatentWatch® Litigation and Generic Entry Outlook for Selenious Acid

A generic version of SELENIOUS ACID was approved as selenious acid by AM REGENT on April 30th, 2019.

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Recent Clinical Trials for SELENIOUS ACID

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

SponsorPhase
American Regent, Inc.Phase 4
Shanghai Changzheng HospitalN/A
Shanghai Zhongshan HospitalN/A

See all SELENIOUS ACID clinical trials

Paragraph IV (Patent) Challenges for SELENIOUS ACID
Tradename Dosage Ingredient Strength NDA ANDAs Submitted Submissiondate
SELENIOUS ACID Intravenous Solution selenious acid 600 mcg/10 mL 209379 11 2024-06-11

US Patents and Regulatory Information for SELENIOUS ACID

SELENIOUS ACID is protected by two US patents.

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Exclusivity Expiration
Am Regent SELENIOUS ACID selenious acid SOLUTION;INTRAVENOUS 209379-003 Aug 30, 2021 AP RX Yes Yes 12,150,957 ⤷  Start Trial ⤷  Start Trial
Zydus Pharms SELENIOUS ACID selenious acid SOLUTION;INTRAVENOUS 219322-002 Jun 30, 2026 AP RX No No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Aspiro SELENIOUS ACID selenious acid SOLUTION;INTRAVENOUS 219633-001 Jun 11, 2025 AP RX No No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Am Regent SELENIOUS ACID selenious acid SOLUTION;INTRAVENOUS 209379-002 Jan 25, 2021 AP RX Yes Yes 11,998,565 ⤷  Start Trial Y ⤷  Start Trial
Gland SELENIOUS ACID selenious acid SOLUTION;INTRAVENOUS 219629-001 Jul 8, 2025 AP RX No No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Aspiro SELENIOUS ACID selenious acid SOLUTION;INTRAVENOUS 219633-002 Jun 11, 2025 AP 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

International Patents for SELENIOUS ACID

See the table below for patents covering SELENIOUS ACID around the world.

Country Patent Number Title Estimated Expiration
Australia 2021300384 ⤷  Start Trial
Canada 3186578 ⤷  Start Trial
China 116096423 ⤷  Start Trial
European Patent Office 4175615 ⤷  Start Trial
South Korea 20230058047 ⤷  Start Trial
World Intellectual Property Organization (WIPO) 2022006426 ⤷  Start Trial
>Country >Patent Number >Title >Estimated Expiration

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