Last Updated: August 9, 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 twenty-nine patents protecting this drug and one Paragraph IV challenge.

This drug has thirty-four patent family members in thirteen countries.

The generic ingredient in CREXONT is carbidopa; levodopa. There are eighteen drug master file entries 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
International Patents:34
US Patents:29
Applicants:1
NDAs:1
Finished Product Suppliers / Packagers: 1
Clinical Trials: 2
Patent Applications: 55
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for CREXONT
What excipients (inactive ingredients) are in CREXONT?CREXONT excipients list
DailyMed Link:CREXONT at DailyMed
Recent Clinical Trials for CREXONT

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

SponsorPhase
The Cleveland ClinicPHASE4
Impax Laboratories, LLCPHASE4
Amneal Pharmaceuticals, 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-one 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 217186-004 Aug 7, 2024 RX Yes Yes ⤷  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 ⤷  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 ⤷  Start Trial
>Applicant >Tradename >Generic Name >Dosage >NDA >Approval Date >TE >Type >RLD >RS >Patent No. >Patent Expiration >Product >Substance >Delist Req. >Exclusivity 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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Drugs may be covered by multiple patents or regulatory protections. All trademarks and applicant names are the property of their respective owners or licensors. Although great care is taken in the proper and correct provision of this service, thinkBiotech LLC does not accept any responsibility for possible consequences of errors or omissions in the provided data. The data presented herein is for information purposes only. There is no warranty that the data contained herein is error free. We do not provide individual investment advice. This service is not registered with any financial regulatory agency. The information we publish is educational only and based on our opinions plus our models. By using DrugPatentWatch you acknowledge that we do not provide personalized recommendations or advice. thinkBiotech performs no independent verification of facts as provided by public sources nor are attempts made to provide legal or investing advice. Any reliance on data provided herein is done solely at the discretion of the user. Users of this service are advised to seek professional advice and independent confirmation before considering acting on any of the provided information. thinkBiotech LLC reserves the right to amend, extend or withdraw any part or all of the offered service without notice.