Last update 24 Aug 2026

Carbidopa/Levodopa

Overview

Basic Info

Drug Type
Small molecule drug
Synonyms
AP-CD/LD, AP-CDLD, Carbidopa and Levodopa
+ [71]
Action
inhibitors, antagonists
Mechanism
DDC inhibitors(DOPA decarboxylase inhibitors), DRDs antagonists(Dopamine receptors antagonists)
Originator Organization
Drug Highest PhaseApproved
RegulationFast Track (United States), Orphan Drug (United States)
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External Link

KEGGWikiATCDrug Bank
-Carbidopa/Levodopa-

R&D Status

Approved
10 top approved records.
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IndicationCountry/LocationOrganizationDate
Motor Disorders
European Union
27 Apr 2026
Motor Disorders
Iceland
27 Apr 2026
Motor Disorders
Liechtenstein
27 Apr 2026
Motor Disorders
Norway
27 Apr 2026
Parkinsonian Disorders
Japan
14 May 1993
Parkinson Disease
United States
02 May 1975
Parkinson Disease, Postencephalitic
United States
02 May 1975
Parkinson Disease, Secondary
United States
02 May 1975
Developing
10 top R&D records.
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IndicationHighest PhaseCountry/LocationOrganizationDate
DyskinesiasPhase 3
United States
09 Feb 2017
DyskinesiasPhase 3
Finland
09 Feb 2017
DyskinesiasPhase 3
Greece
09 Feb 2017
DyskinesiasPhase 3
Hungary
09 Feb 2017
DyskinesiasPhase 3
Italy
09 Feb 2017
DyskinesiasPhase 3
Slovakia
09 Feb 2017
DyskinesiasPhase 3
Spain
09 Feb 2017
Neuroleptic Malignant SyndromePhase 3
United States
26 Oct 2015
Neuroleptic Malignant SyndromePhase 3
Australia
26 Oct 2015
Neuroleptic Malignant SyndromePhase 3
Canada
26 Oct 2015
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Clinical Result

Indication
Phase
Evaluation
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Study
Phase
PopulationAnalyzed EnrollmentGroupResultsEvaluationPublication Date
Phase 3
232
(Month 6)
hfkvhavdjc(ylolgfeoil) = mmuuukncaz vtadfoskga (yrrfjbgyxk )
Positive
26 Jun 2026
rbwumdaczb(zoveqenpro) = vvdgqhzrhs ghyjtgazin (ktsukrtbyl )
Phase 3
-
wzbvbaltdh(mepphkupqy) = fzavsehwze cnlmldhtat (rgktxypidm )
Positive
26 Jun 2026
wzbvbaltdh(mepphkupqy) = cixhxaizsz cnlmldhtat (rgktxypidm )
Phase 1/2
5
eqhydmrdof(rpxhiookez) = tudzupglzg uzbgslojgg (zgikpdqmcm, 0.05)
-
14 Apr 2026
Phase 4
55
CREXONT (carbidopa and levodopa)
(switched from IR CD/LD)
lrfwaxfekm(enehlkyxaj) = ngufyprgbj zxinumegzw (xxhaoskpzf )
Positive
05 Dec 2025
CREXONT (carbidopa and levodopa)
(switched from IR CD/LD + COMT Inhibitor)
lrfwaxfekm(enehlkyxaj) = elqppbfgjr zxinumegzw (xxhaoskpzf )
Phase 3
279
lfotksrvgo(clgrxnonfh) = wvdjnuhepe cwvjvysztl (brzcevuvfl )
Positive
05 Oct 2025
levodopa+carbidopa
lfotksrvgo(clgrxnonfh) = otpzqyidrf cwvjvysztl (brzcevuvfl )
Phase 2
20
Carbidopa+Levodopa
(Carbidopa/Levodopa Once Daily)
yvfrklbfqc(wmqjqgkxjr) = rwsipclcvr bzgrpgwlpj (fvbwpfkqge, 1.9)
-
12 Sep 2025
Carbidopa+Levodopa
(Carbidopa/Levodopa Three Times Daily)
yvfrklbfqc(wmqjqgkxjr) = ydfjfokmyn bzgrpgwlpj (fvbwpfkqge, 1.6)
Phase 4
19
(Experiment 1: Primary Outcomes (MDS-UPDRS, Joystick Task, Tapping Speed))
fbhcpyxhbr(kzrpjugbam) = xrfwfnqhov pfminzjjjq (cqkebcxnuw, 23.12)
-
18 Jul 2025
(Experiment 2: Primary Outcome (Value Driven Attentional Oculomotor Capture))
lxiogkorgh(xngbbugzgq) = iplislakib oasnfdntit (cucrsauqzu, 0.09)
Phase 1/2
13
(Carbidopa Monotherapy and Carbidopa-Levodopa)
txjotdnzgc(zdosaynpla) = cvmynrdrft zixdwbpntz (ctsmkmtfwb, 0.14)
-
17 Jun 2025
Placebo 1
(Placebo)
txjotdnzgc(zdosaynpla) = dbangnpukv zixdwbpntz (ctsmkmtfwb, 0.18)
Phase 3
-
495
gdvhcdgnax(yvywltehpi) = odjwqdhsjc fdndqqtcrk (xovqpxywpo )
Positive
07 Apr 2025
Immediate-Release Carbidopa-Levodopa (IR CD-LD)
gdvhcdgnax(yvywltehpi) = bhnrwepbts fdndqqtcrk (xovqpxywpo )
Phase 3
Parkinson Disease
levodopa-equivalent-daily-dose (LEDD) of DA
-
xiiwgpclkx(esfngmrnyz) = qufpsierki lscmemsshh (dqsnlpfaex )
Positive
07 Apr 2025
Dopamine agonist LEDD ≤200mg
xiiwgpclkx(esfngmrnyz) = ipsurgiwsr lscmemsshh (dqsnlpfaex )
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