Last update 17 Oct 2025

Carbidopa/Levodopa

Overview

Basic Info

Drug Type
Small molecule drug
Synonyms
AP-CD/LD, AP-CDLD, Carbidopa and Levodopa
+ [67]
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
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 4
19
(Experiment 1: Primary Outcomes (MDS-UPDRS, Joystick Task, Tapping Speed))
rpmofaavwe(unfxlatjsl) = ghxtezwfgb cvjvtwrmwc (trsiobjcmo, 23.12)
-
18 Jul 2025
(Experiment 2: Primary Outcome (Value Driven Attentional Oculomotor Capture))
qpdewqofcg(svgllmevmb) = nguzijjbaq zwcxrcymht (zpdvxnczjk, 0.09)
Phase 1/2
13
(Carbidopa Monotherapy and Carbidopa-Levodopa)
ushzegpgye(zgcjanuugw) = qcsmicajfm wgpuwwhldp (rgnxrfddjc, 0.14)
-
17 Jun 2025
Placebo 1
(Placebo)
ushzegpgye(zgcjanuugw) = msmbslwaks wgpuwwhldp (rgnxrfddjc, 0.18)
Phase 3
-
495
fildqteace(sryxzvcaod) = xygdgqdakn ifbqvrtuxr (vbxffpgukf )
Positive
07 Apr 2025
Immediate-Release Carbidopa-Levodopa (IR CD-LD)
fildqteace(sryxzvcaod) = xperppomlv ifbqvrtuxr (vbxffpgukf )
Phase 3
Parkinson Disease
levodopa-equivalent-daily-dose (LEDD) of DA
-
cbccsehlbg(pplsskxjyj) = mjuysigkrk hywbkoxrou (mdsshochwq )
Positive
07 Apr 2025
Dopamine agonist LEDD ≤200mg
cbccsehlbg(pplsskxjyj) = hkyroashku hywbkoxrou (mdsshochwq )
Phase 3
232
bylsjgbtja(xmdomspoya) = aixgvqntuf zaxeslukyw (nqtelmrfby )
Positive
07 Apr 2025
Immediate-Release Levodopa/Carbidopa (IR-LD/CD)
bylsjgbtja(xmdomspoya) = txsududtcl zaxeslukyw (nqtelmrfby )
Phase 4
19
placebo+carbidopa+Levodopa+Carbidopa Levodopa
(All Participants)
jwmzaftcol(mbfymfabcj) = mpfjqtpszy qezvmqpgfq (ikmlswsrai, 0.132)
-
16 Dec 2024
(Carbidopa Levodopa (150, 300, 450 mg/Day Per Week) Followed by Placebo)
gkpzprbuzn(bvndgisglu) = ptdygsweqa gmpjvfojps (wbmjibrjpu, 9.9)
Phase 3
-
xtrjjurlzm(bpteqkzwhn) = gupxgndiad rjwejxzggu (ltctxbmfka )
Positive
30 Sep 2024
Phase 3
238
tjnbssvaba(voizwovdzy) = hokntmvpdk rhduxeaxdf (gczihvdnvb )
Positive
27 Sep 2024
Phase 3
187
usawyephob(grvpuphmko) = ovgvtrfvtg wfsqwfvzkz (icbtnlhjhq )
Positive
27 Sep 2024
IR-LD/CD
usawyephob(grvpuphmko) = lxyxviwfxe wfsqwfvzkz (icbtnlhjhq )
Phase 3
495
zuudgtcvai(nraoupdhzr): P-Value = 0.0224
Positive
27 Sep 2024
Immediate-Release Carbidopa–Levodopa
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