Drugs / Levodopa
last change Sep 2026 re-read 9 days ago

Levodopa

targets GPR143 via activation

Developed for
Parkinson disease · age-related macular degeneration · cocaine dependence · depressive disorder · major depressive disorder · restless legs syndrome · Angelman syndrome · aphasia
+23 more · atypical depressive disorder · cocaine abuse · cognitive impairment with or without cerebellar ataxia · diabetic retinopathy · dysthymic disorder · stroke disorder · albinism · alcohol-related disorders · Alzheimer disease · brain injury · dyslexia · impulse control disorder · ischemic stroke · obstructive sleep apnea syndrome · oculocutaneous albinism · retinal disorder · spinal cord injury · type 2 diabetes mellitus · amblyopia · amyotrophic lateral sclerosis · post-traumatic stress disorder · primary progressive freezing gait · subacute bursitis
Investigated by
Acorda Therapeutics · Bial - Portela C S.A. · Emory University · University Hospital Muenster · National Institute of Neurological Disorders and Stroke (NINDS) · Orion Corporation, Orion Pharma
+98 more · Impax Laboratories, LLC · Intec Pharma Ltd. · National Institute of Mental Health (NIMH) · National Institute on Drug Abuse (NIDA) · NeuroDerm Ltd. · AbbVie · Hong Kong WD Pharmaceutical Co., Limited · Michael J. Fox Foundation for Parkinson's Research · New York State Psychiatric Institute · Pfizer · Shanghai WD Pharmaceutical Co., Ltd. · Snyder, Robert W., M.D., Ph.D., P.C. · The University of Texas Health Science Center, Houston · Boehringer Ingelheim · Institute for Neurodegenerative Disorders · Solvay Pharmaceuticals · TFS Trial Form Support · University Hospital, Toulouse · Amneal Pharmaceuticals, LLC · Angelman Syndrome Foundation, Inc. · BalGenSource Medical Technology Co. Ltd. · Baylor College of Medicine · Bennett Lavenstein · Bronx VA Medical Center · Children's Hospital Medical Center, Cincinnati · Cita NeuroPharmaceuticals · Clinical Data Science GmbH · Clintrex Research Corporation · Cooperative Clinical Drug Research and Development AG (CCDRD AG) · David Escobar · Depomed · Fondation de France · GE Healthcare · German Federal Ministry of Education and Research · German Research Foundation · Giovanni Mirabella · Greenwood Genetic Center · Institut de Myologie, France · International Brain Research Foundation · Julien Bally · Kevin J. Black, MD · Laboratorios Andromaco S.A. · Laboratorios Phoenix S.A.I.C.y F. · LobSor Pharmaceuticals AB · Maastricht University Medical Center · McGill University Health Centre/Research Institute of the McGill University Health Centre · McMaster University · Medical University of Vienna · Morningside Center for Innovative and Affordable Medicine · Neurocrine Biosciences · Newron Pharmaceuticals SPA · Novartis · Poitiers University Hospital · Providence Health & Services · PureIMS B.V. · Qilu Hospital of Shandong University · Quintiles, Inc. · Quotient Clinical · Rady Children's Hospital, San Diego · SMG-SNU Boramae Medical Center · Samsung Medical Center · Sandoz · Second Affiliated Hospital of Soochow University · Seoul National University Hospital · Shanghai BioGuider Medical Technology Co., Ltd. · Shanghai Xihua Scientific Co., Ltd. · Singapore General Hospital · Singapore University of Technology and Design · Snyder Biomedical Corporation · SynAgile Corporation · Syneos Health · Tel-Aviv Sourasky Medical Center · The Cleveland Clinic · UCB Pharma · all 104 on the full record

Regulatory milestones approvals, filings & regulatory actions · 7 recorded

MilestoneJurisdictionBrandIndicationDateSentence it was read from
Filed Parkinson disease 4 milestones
Rejected (CRL) US (FDA) Vadova Parkinson disease 2008-01-30

“received a non-approvable letter from the U.S. Food and Drug Administration (FDA) concerning its new drug application (NDA) and subsequent submissions for Vadova(R)...” amneal.com ↗

Filed US (FDA) Vadova Parkinson disease 2007-01-18

“filed an amendment to its new drug application (NDA) with the U.S. Food and Drug Administration (FDA) for its Vadova(TM) (carbidopa/levodopa) tablets.” amneal.com ↗

“the triple tablet combining entacapone with levodopa and carbidopa were filed by Orion Pharma with the US regulatory authority FDA in late August” orionpharma.com ↗

“New Drug Applications for Triple Combination Tablet for Parkinson's under review in the US and the EU” orionpharma.com ↗

Rejected (CRL) US (FDA) Vadova Parkinson disease 2006-03-07

“received a non-approvable letter from the U.S. Food and Drug Administration (FDA) concerning its new drug application for Vadova(R) (carbidopa/levodopa) tablets.” amneal.com ↗

Filed EU (EMA) — Parkinson disease —

“New Drug Applications for Triple Combination Tablet for Parkinson's under review in the US and the EU” orionpharma.com ↗

Approved Indication not stated 3 milestones
Approved EU (EMA) Stalevo — 2003-10-17 europa.eu ↗
Label expansion US (FDA) DOPAR — 1975-02-27 fda.gov ↗
Approved US (FDA) LARODOPA — 1970-06-04 fda.gov ↗

Trials 120 · started per year

today
US approved 1970
EU approved 2003
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PhaseRegistry idDatesIndicationSponsorStatusOutcome
Phase 02 trials
Phase 0 NCT05471609 Jun → Aug 2025 — University of Minnesota Completed No outcome recorded
Phase 0 NCT05132660 Jul 2022 → Dec 2027 expected diabetic retinopathy VA Office of Research and Development Enrolling by invitation No outcome recorded
Phase 134 trials · 2 met primary
Phase 1 NCT07442591 Mar → Apr 2026 — Shanghai WD Pharmaceutical Co., Ltd. Completed No outcome recorded
Phase 1 NCT06037590 Sep → Oct 2023 Parkinson disease PureIMS B.V. Completed Met primary
Phase 1 NCT05708274 Jan 2023 → Oct 2025 spinal cord injury Bronx VA Medical Center Completed No outcome recorded
Phase 1 NCT05250141 Feb 2022 — Laboratorios Andromaco S.A. Completed No outcome recorded
Phase 1 NCT05128175 Oct 2021 → Jan 2022 Parkinson disease Shanghai WD Pharmaceutical Co., Ltd. Unknown No outcome recorded
Phase 1 NCT04591535 Sep 2020 → Mar 2021 Parkinson disease Hong Kong WD Pharmaceutical Co., Limited Unknown No outcome recorded
Phase 1 NCT04553978 Sep 2020 → Mar 2021 Parkinson disease Hong Kong WD Pharmaceutical Co., Limited Unknown No outcome recorded
Phase 1 NCT04513340 Aug → Sep 2020 Parkinson disease Hong Kong WD Pharmaceutical Co., Limited Unknown No outcome recorded
Phase 1 NCT03887884 Mar → Jun 2019 Parkinson disease Acorda Therapeutics Completed No outcome recorded
Phase 1 NCT03496870 Feb → Jul 2018 Parkinson disease Neurocrine Biosciences Completed No outcome recorded
Phase 1/25 trials
Phase 1/2 NCT06831500 Jul 2025 → Nov 2026 expected Parkinson disease, multiple system atrophy, parkinsonian type, orthostatic hypotension Julien Bally Recruiting No outcome recorded
Phase 1/2 NCT02696512 Mar 2016 → Mar 2017 brain injury International Brain Research Foundation Unknown No outcome recorded
Phase 1/2 NCT01026428 Sep 2009 → Jul 2010 Parkinson disease Newron Pharmaceuticals SPA Completed No outcome recorded
Phase 1/2 NCT00491998 Nov 2006 → Nov 2007 Parkinson disease Vernalis (R&D) Ltd Completed No outcome recorded
Phase 1/2 NCT00239564 Oct 2005 → Dec 2007 Parkinson disease Impax Laboratories, LLC Completed No outcome recorded
Phase 225 trials · 1 met primary
Phase 2 NCT06626152 Aug 2024 → May 2026 overdue major depressive disorder University of British Columbia Recruiting No outcome recorded
Phase 2 NCT07444892 Apr 2022 → Nov 2025 diabetic retinopathy Emory University Completed No outcome recorded
Phase 2 NCT05036473 Nov 2021 → Dec 2022 Parkinson disease Shanghai WD Pharmaceutical Co., Ltd. Completed No outcome recorded
Phase 2 NCT04778176 Jun 2021 → Jul 2022 Parkinson disease SynAgile Corporation Completed No outcome recorded
Phase 2 NCT02873351 Sep 2019 → Dec 2020 age-related macular degeneration Snyder, Robert W., M.D., Ph.D., P.C. Withdrawn No outcome recorded
Phase 2 NCT03197493 Aug 2017 → Jul 2020 age-related macular degeneration Snyder, Robert W., M.D., Ph.D., P.C. Completed No outcome recorded
Phase 2 NCT03022318 May 2017 → Dec 2019 age-related macular degeneration Snyder, Robert W., M.D., Ph.D., P.C. Completed No outcome recorded
Phase 2 NCT02577523 Dec 2015 → Dec 2016 Parkinson disease NeuroDerm Ltd. Completed Met primary
Phase 2 NCT02271503 Nov 2015 → Aug 2016 Parkinson disease Impax Laboratories, LLC Completed No outcome recorded
Phase 2 NCT02080819 Feb 2014 → Jan 2017 cocaine dependence Virginia Commonwealth University Completed No outcome recorded
Phase 2/33 trials · 1 missed
Phase 2/3 NCT05487300 May 2022 → May 2023 Parkinson disease, orthostatic hypotension University of Utah Completed No outcome recorded
Phase 2/3 NCT01468012 Jul 2014 cocaine dependence New York State Psychiatric Institute Completed No outcome recorded
Phase 2/3 NCT01281475 Jan 2011 → Jul 2015 Angelman syndrome Wen-Hann Tan Completed Missed primary
Phase 314 trials · 2 met primary
Phase 3 NCT04379050 Jun 2020 → Apr 2026 Parkinson disease AbbVie Completed No outcome recorded
Phase 3 NCT03462043 Apr → Nov 2018 Parkinson disease NeuroDerm Ltd. Withdrawn No outcome recorded
Phase 3 NCT02615873 Jul 2016 → Dec 2019 Parkinson disease Intec Pharma Ltd. Unknown No outcome recorded
Phase 3 NCT02605434 Mar 2016 → Jul 2019 Parkinson disease Intec Pharma Ltd. Unknown No outcome recorded
Phase 3 NCT02352363 Mar 2015 → May 2017 Parkinson disease Acorda Therapeutics Completed No outcome recorded
Phase 3 NCT02242487 Mar 2015 → May 2018 Parkinson disease Acorda Therapeutics Completed No outcome recorded
Phase 3 NCT02240030 Nov 2014 → Dec 2016 Parkinson disease Acorda Therapeutics Completed Met primary
Phase 3 NCT02073773 Jan 2014 → Nov 2015 ischemic stroke Singapore General Hospital Completed No outcome recorded
Phase 3 NCT01736176 Mar 2013 → Mar 2015 Parkinson disease AbbVie Completed No outcome recorded
Phase 3 NCT00134966 Aug 2005 → Sep 2007 Parkinson disease Novartis Completed Met primary
Phase 424 trials · 2 met primary · 1 missed
Phase 4 NCT06765668 Feb → Nov 2025 overdue Parkinson disease Impax Laboratories, LLC Recruiting No outcome recorded
Phase 4 NCT06075771 Nov 2023 → Jan 2027 expected atypical depressive disorder, depressive disorder Emory University Recruiting No outcome recorded
Phase 4 NCT06236230 Nov 2023 → Jun 2024 Parkinson disease Second Affiliated Hospital of Soochow University Unknown No outcome recorded
Phase 4 NCT06013956 Aug 2023 → Jun 2028 expected Parkinson disease David Escobar Recruiting No outcome recorded
Phase 4 NCT04742348 Feb → Aug 2023 alcohol-related disorders University of Washington Withdrawn No outcome recorded Stop: Business
Phase 4 NCT06234995 Aug 2021 → Sep 2027 expected Parkinson disease Emory University Recruiting No outcome recorded
Phase 4 NCT04723147 Jan 2021 → Oct 2023 atypical depressive disorder, depressive disorder Emory University Completed No outcome recorded
Phase 4 NCT04821830 Feb 2020 → Apr 2024 Parkinson disease University of Michigan Completed No outcome recorded
Phase 4 NCT03761030 Jan 2019 → Sep 2021 dysthymic disorder, major depressive disorder New York State Psychiatric Institute Terminated No outcome recorded Stop: Enrollment
Phase 4 NCT03111485 May 2017 → Oct 2022 Parkinson disease, obstructive sleep apnea syndrome McGill University Health Centre/Research Institute of the McGill University Health Centre Completed No outcome recorded
Phase not applicable13 trials
— NCT07647913 Sep 2026 → Sep 2027 expected Parkinson disease McMaster University Not yet recruiting No outcome recorded
— NCT06365515 May 2024 → Dec 2025 menstrual disorder University Hospital Tuebingen Unknown No outcome recorded
— NCT03665493 Sep 2020 → Jan 2023 Parkinson disease Giovanni Mirabella Completed No outcome recorded
— NCT05901350 Jun 2019 → Jun 2022 Parkinson disease, vision disorder Qilu Hospital of Shandong University Completed No outcome recorded
— NCT06275633 Mar 2019 → Dec 2021 Parkinson disease, cognitive impairment with or without cerebellar ataxia, depressive disorder University Hospital Bispebjerg and Frederiksberg Completed No outcome recorded
— NCT02785978 Jun 2016 → Jun 2017 Parkinson disease Institut de Myologie, France Completed No outcome recorded
— NCT01937169 Jan 2014 → Jan 2016 restless legs syndrome Tel-Aviv Sourasky Medical Center Unknown No outcome recorded
— NCT03235037 Nov 2013 → Feb 2019 Angelman syndrome Bennett Lavenstein Completed No outcome recorded
— NCT01577992 Dec 2011 → Jun 2013 multiple system atrophy University Hospital, Toulouse Completed No outcome recorded
— NCT01218425 Nov 2010 → Jun 2012 — Maastricht University Medical Center Completed No outcome recorded
Comparator or background therapy64 trials
Phase 0 NCT03333369 Comparator May 2014 → Aug 2015 schizotypal personality disorder University of Zurich Completed No outcome recorded
Phase 1 NCT04052776 Comparator Sep 2020 → Oct 2023 spinal cord injury Centre Hospitalier Universitaire Vaudois Completed No outcome recorded
Phase 1 NCT03929068 Comparator May 2019 → Jul 2022 amyotrophic lateral sclerosis Washington University School of Medicine Completed No outcome recorded
Phase 1 NCT02116465 Comparator Mar 2014 — Desitin Arzneimittel GmbH Completed No outcome recorded
Phase 1 NCT01486628 Comparator Apr → Nov 2012 Parkinson disease NeuroDerm Ltd. Completed No outcome recorded

News releases announcing trial results or a regulatory action · 36

DateIssuerRelease
2026-08-28 Zambon SpA Regulatory Zambon announces European Commission approval of Hopledo® for Adults with Parkinson's Disease and Moderate to Severe Motor Fluctuations zambon.com ↗
Zambon today announced that the European Commission (EC) has granted marketing authorization for Hopledo® (modified-release levodopa/carbidopa) for the treatment of adult patients with Parkinson’s disease and moderate to severe motor fluctuations who have not been sufficiently stabilized with oral levodopa/dopa decarboxylase (DDC) inhibitor-based treatment regimens.
2026-06-29 Impax Laboratories, LLC Regulatory Zambon and Amneal Announce Positive CHMP Opinion for Hopledo® (IPX203) for Adults with Parkinson’s Disease and Moderate to Severe Motor Fluctuations amneal.com ↗
2026-06-05 Impax Laboratories, LLC Results Amneal Announces Full Study Population Interim Phase 4 ELEVATE-PD Results, Reinforcing Previously Reported Benefits of CREXONT® in Parkinson's Disease amneal.com ↗
After patients switched from prior therapies, treatment with CREXONT delivered meaningful increases in “Good On” time, reductions in “Off” time, and improved motor symptom control.
2025-12-05 Impax Laboratories, LLC Results Amneal Announces Positive Interim Phase 4 ELEVATE-PD Results With CREXONT® for Parkinson’s Disease amneal.com ↗
CREXONT delivered substantial “Off” time reductions, improved motor symptom control and provided a longer duration of benefit with each dose
2025-09-02 PureIMS B.V. Results An In Vitro–In Vivo Comparison of Two Levodopa Dry Powder Products for Inhalation: A Randomized Trial Comparing Inbrija and Levodopa Cyclops pureims.com ↗
Despite this in vitro difference, the pharmacokinetic profiles of Inbrija 84 mg and Levodopa Cyclops 90 mg were similar, with no differences in Cmax, Tmax, and AUC, showing bioequivalence between the two products.
2025-04-07 Impax Laboratories, LLC Results Amneal Announces New Data from Phase 3 Study Showing Significant Improvements in Sleep Quality with CREXONT® (Carbidopa and Levodopa) Extended-Release Capsules in Parkinson’s Disease amneal.com ↗
Analysis of RISE-PD presented at AAN 2025 showed CREXONT treatment significantly improved patients’ Parkinson’s Disease Sleep Scale-2 (PDSS-2) total and sub-scale scores
2024-09-18 PureIMS B.V. Results International Congress of Parkinson’s Disease and Movement Disorders 2024 – poster on Levodopa Cyclops® pureims.com ↗
Levodopa absorption from Cyclops® is comparable to Inbrija®, thereby, fulfilling the bioequivalence criteria.
2024-08-07 Impax Laboratories, LLC Regulatory Amneal Receives U.S. FDA Approval for IPX203 for Treatment of Parkinson’s Disease to Be Launched as CREXONT® (Carbidopa and Levodopa) Extended-Release Capsules amneal.com ↗
Amneal Pharmaceuticals, Inc. (Nasdaq: AMRX) (“Amneal” or the “Company”) today announced that the U.S. Food and Drug Administration (FDA) has approved CREXONT ® (carbidopa and levodopa) extended-release capsules for the treatment of Parkinson’s disease (PD).
2024-01-18 PureIMS B.V. Results PureIMS gears up for abbreviated registration of Levodopa Cyclops® against OFF episodes in Parkinson’s disease with the successful completion of a comparative pharmacokinetic study pureims.com ↗
The study results show rapid pulmonary absorption of levodopa in absence of safety and tolerability issues.
2023-08-24 Impax Laboratories, LLC Results JAMA Neurology Publishes Phase 3 Study Results Comparing IPX203 to Immediate-Release Carbidopa/Levodopa for Parkinson’s Disease amneal.com ↗
Amneal Pharmaceuticals, Inc. (NYSE: AMRX) today announced that JAMA Neurology has published results from the RISE-PD clinical study assessing the efficacy and safety of IPX203 versus optimized immediate-release carbidopa/levodopa (IR CD/LD) for the treatment of Parkinson’s disease (PD).
2023-04-06 Zydus Lifesciences Limited Regulatory Zydus receives final approval from the USFDA for Carbidopa and Levodopa Tablets USP, 10 mg/100 mg, 25 mg/100 mg, and 25 mg/250 mg zyduslife.com ↗
Zydus Lifesciences Limited (including its subsidiaries/affiliates, hereafter referred to as “Zydus”) has received final approval from the United States Food and Drug Administration (USFDA) to manufacture and market Carbidopa and Levodopa Tablets USP, 10 mg/100 mg, 25 mg/100 mg, and 25 mg/250 mg (USRLD: Sinemet Tablets, 10 mg/100 mg, 25 mg/100 mg, and 25 mg/250 mg).
2022-03-31 AbbVie Results Cerevel Therapeutics Announces Upcoming Presentations at AAN 2022 abbvie.com ↗
The results show that levodopa treatment occurs more consistently than dopamine agonist treatment, as patients prescribed dopamine agonists had relatively high treatment modification and discontinuation rates and low medication adherence.

All press releases naming this drug 60 releases

DateIssuerRelease

Evidence & citations 14 cited values

Every value below carries the sentence it was read from. 185 sources stand behind the page.

FieldValueCited text
Known as levodopa “Those assigned to L-DOPA will begin taking 37.5mg carbidopa/150 mg levodopa once daily (with placebo twice daily) for one week, then increase to 75mg carbidopa/300mg levodopa...” NCT03761030 ↗
179

“The goal of this multicentric prospective randomized controlled clinical and economic study is to investigate the effectiveness and cost-utility of long-term continuous...” NCT01291537 ↗

“To test whether Parcopa, a new Orally Disintegrating Tablet of Carbidopa-Levodopa, has a faster onset of action, changes in the UPDRS Motor Exam score at intervals after a...” NCT00139880 ↗

“first-morning dose of levodopa medicament (levodopa, dopamine agonists, anticholinergic drugs, or a combination of levodopa and an anticholinergic drug) which normally allowed...” NCT03665493 ↗

“Battery of medications provided through a 12-week schedule including: Minocycline, Lamotrigine, Flumazenil, Modafinil, Bromocriptine, Donepezil, Methylphenidate, Methyl B12,...” NCT02696512 ↗

“The drug Levodopa (L-DOPA), which can replace missing dopamine in the brain, has been used to treat to treat Parkinson's disease for many decades, and it might also affect...” NCT06626152 ↗

“CREXONT ER capsules will contain Carbidopa (CD)/Levodopa (LD) 35.0 milligrams (mg)/140 mg and/or CD/LD 52.5 mg/210.0 mg and/or CD/LD 70.0 mg/280 mg and/or CD/LD 87.5 mg/350 mg.” NCT06765668 ↗

“Levodopa inhalation powder, will be supplied in capsules containing levodopa (l-dopa), designed to deliver to the lung using the CVT-301 inhaler.” NCT02633839 ↗

“Patients received 3 doses of levodopa (100mg of levodopa plus 25mg of carbidopa) or placebo before 1 session of procedural motor learning.” PMID 18760148 ↗ Sep 2008

“Intermittent Oral Administration vs. Semi-continuous Intra-oral Administration of Levodopa/Carbidopa in Fluctuating Parkinsonian Patients” NCT02763137 ↗

“1 capsule of Madopar® HBS 125 (levodopa 100 mg / benserazide 25 mg) in an open label manner, concomitantly with BIA 6-512/Placebo.” NCT03091543 ↗

Show 169 more sources

Known as CVT-301 “A Study to Compare Two Dose Strengths of CVT-301 (Levodopa Inhalation Powder) With an Oral Dose of Sinemet® (Carbidopa-levodopa) Tablets” NCT02812394 ↗
8

“Safety and efficacy of CVT-301 (levodopa inhalation powder) on motor function” PMID 30663606 ↗ Feb 2019

“CVT-301 levodopa (l-dopa)” NCT02807675 ↗

NCT02242487 ↗

NCT02352363 ↗

NCT03887884 ↗

NCT02633007 ↗

NCT01777555 ↗

NCT01617135 ↗

Known as DUODOPA “The goal of this multicentric prospective randomized controlled clinical and economic study is to investigate the effectiveness and cost-utility of long-term continuous...” NCT01291537 ↗
Known as L-DOPA “Those assigned to L-DOPA will begin taking 37.5mg carbidopa/150 mg levodopa once daily (with placebo twice daily) for one week, then increase to 75mg carbidopa/300mg levodopa...” NCT03761030 ↗
5

“The drug Levodopa (L-DOPA), which can replace missing dopamine in the brain, has been used to treat to treat Parkinson's disease for many decades, and it might also affect...” NCT06626152 ↗

“Levodopa inhalation powder, will be supplied in capsules containing levodopa (l-dopa), designed to deliver to the lung using the CVT-301 inhaler.” NCT02633839 ↗

“The purpose of this study is to investigate a new use for a medication called levodopa (L-DOPA).” NCT02560389 ↗

“Trial of L-DOPA as a Treatment to Improve Vision in Albinism” NCT01176435 ↗

“CVT-301 levodopa (l-dopa)” NCT02807675 ↗

Known as Levodopa Cyclops “PureIMS is developing a drug-device combination product called Levodopa Cyclops®, a pre-filled drug-device combination of levodopa inhalation powder for use with the Cyclops®...” NCT06037590 ↗
Known as LIP “CVT-301, levodopa inhalation powder (LIP)” NCT02807675 ↗
Known as melevodopa/carbidopa “the effervescent tablet of melevodopa/carbidopa (V1512; Sirio) compared with standard-release” PMID 26171276 ↗ Jun 2015
Known as Sinemet “levodopa (Sinemet)” NCT00006337 ↗
Known as Sirio “the effervescent tablet of melevodopa/carbidopa (V1512; Sirio) compared with standard-release” PMID 26171276 ↗ Jun 2015
Known as V1512 ClinicalTrials.gov intervention name — accepted as the source's own label NCT00491998 ↗
Action Activate “L-DOPA was the natural ligand or stimulator of GPR143” NCT02873351 ↗
Route Intravenous “Patients will stop taking their usual oral levodopa medicine and instead will have levodopa infused through a vein for up to 12 hours” NCT00006077 ↗
Route Oral “Patients will stop taking their usual oral levodopa medicine and instead will have levodopa infused through a vein for up to 12 hours” NCT00006077 ↗
Target GPR143 “L-DOPA binds to GPR143 in the retinal pigment epithelium” NCT02873351 ↗