Last Updated: September 24, 2026

CREXONT Drug Patent Profile


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

Crexont is a drug marketed by Impax and is included in one NDA. There are thirty patents protecting this drug and one Paragraph IV challenge.

The generic ingredient in CREXONT is carbidopa; levodopa. There is one drug master file entry for this compound. Thirty-eight suppliers are listed for this compound. Additional details are available on the carbidopa; levodopa profile page.

DrugPatentWatch® Litigation and Generic Entry Outlook for Crexont

A generic version of CREXONT was approved as carbidopa; levodopa by DR REDDYS LABS SA on August 28th, 1992.

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Summary for CREXONT
Recent Clinical Trials for CREXONT

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

SponsorPhase
The Cleveland ClinicPHASE4
Amneal Pharmaceuticals, LLCPHASE4
Impax Laboratories, LLCPHASE4

See all CREXONT clinical trials

Pharmacology for CREXONT
Paragraph IV (Patent) Challenges for CREXONT
Tradename Dosage Ingredient Strength NDA ANDAs Submitted Submissiondate
CREXONT Extended-release Capsules carbidopa; levodopa 35 mg/140 mg 52.5 mg/210 mg 70 mg/280 mg 87.5 mg/350 mg 217186 1 2024-09-23

US Patents and Regulatory Information for CREXONT

CREXONT is protected by sixty-two 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
Impax CREXONT carbidopa; levodopa CAPSULE, EXTENDED RELEASE;ORAL 217186-002 Aug 7, 2024 RX Yes No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Impax CREXONT carbidopa; levodopa CAPSULE, EXTENDED RELEASE;ORAL 217186-004 Aug 7, 2024 RX Yes Yes ⤷  Start Trial ⤷  Start Trial Y ⤷  Start Trial
Impax CREXONT carbidopa; levodopa CAPSULE, EXTENDED RELEASE;ORAL 217186-001 Aug 7, 2024 RX Yes No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Impax CREXONT carbidopa; levodopa CAPSULE, EXTENDED RELEASE;ORAL 217186-003 Aug 7, 2024 RX Yes No ⤷  Start Trial ⤷  Start Trial ⤷  Start Trial
Impax CREXONT carbidopa; levodopa CAPSULE, EXTENDED RELEASE;ORAL 217186-002 Aug 7, 2024 RX Yes No ⤷  Start Trial ⤷  Start Trial Y ⤷  Start Trial
Impax CREXONT carbidopa; levodopa CAPSULE, EXTENDED RELEASE;ORAL 217186-003 Aug 7, 2024 RX Yes No ⤷  Start Trial ⤷  Start Trial Y ⤷  Start Trial
Impax CREXONT carbidopa; levodopa CAPSULE, EXTENDED RELEASE;ORAL 217186-001 Aug 7, 2024 RX Yes 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 CREXONT

See the table below for patents covering CREXONT around the world.

Country Patent Number Title Estimated Expiration
Australia 2014332024 ⤷  Start Trial
Australia 2019284060 ⤷  Start Trial
Australia 2021282393 ⤷  Start Trial
Canada 2926082 ⤷  Start Trial
China 105658211 ⤷  Start Trial
Denmark 3782614 ⤷  Start Trial
European Patent Office 3054929 ⤷  Start Trial
>Country >Patent Number >Title >Estimated Expiration

Supplementary Protection Certificates for CREXONT

Patent Number Supplementary Protection Certificate SPC Country SPC Expiration SPC Description
3209302 2390502-9 Sweden ⤷  Start Trial PRODUCT NAME: FOSLEVODOPA/FOSCARBIDOPA; NAT. REG. NO/DATE: MTNR 62386 20220912; FIRST REG.: AT 141371 20220826
>Patent Number >Supplementary Protection Certificate >SPC Country >SPC Expiration >SPC Description

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