The DOI matches its Crossref record; 91 of the 92 references it cites were found in a registry or an index.
Initiation of pharmacological therapy in Parkinson's disease: when, why, and how
Open accessAbstract
Debate is ongoing regarding when, why, and how to initiate pharmacotherapy for Parkinson's disease. Early initiation of dopaminergic therapies does not convey disease-modifying effects but does reduce disability. Concerns about the development of motor complications arising from the early initiation of levodopa, which led to misconceived levodopa-sparing strategies, have been largely mitigated by the outcomes of the PD MED and Levodopa in Early Parkinson's Disease (LEAP) studies. The LEAP study also showed the potential for early improvement in quality of life, even when disability is negligible. Until more effective methods of providing stable dopamine concentrations are developed, current evidence supports the use of levodopa as initial symptomatic treatment in most patients with Parkinson's disease, starting with low doses and titrating to therapeutic threshold. Monoamine oxidase-B inhibitors and dopamine agonists can be reserved as potential adjunct treatments later in the disease course. Future research will need to establish effective disease-modifying treatments, address whether patients' quality of life is substantially improved with early initiation of treatment rather than a wait and watch strategy, and establish whether new levodopa formulations will delay onset of dyskinesia.
Overview
Integrity signals
Registry
Cites
Statistics
Verification
Claims the paper makes
Claims other papers make about this one
Each is checked against this paper’s own text: does it say what the citing paper says it does?
In the citing paper
“At present, there is no specific medicine to cure PD [19].”
From Neuroprotective Effect of Ceftriaxone on MPTP‐Induced Parkinson’s Disease Mouse Model by Regulating Inflammation and Intestinal Microbiota (2021) · cites this paper as [19]
Citations
Cites
Norman, G. R., Sloan, J. A., & Wyrwich, K. W. (2003) · Medical Care · doi:10.1097/01.mlr.0000062554.74615.4c · Cited by 4,700
Unified Parkinson's Disease Rating Scale
(2012) · Springer eBooks · doi:10.1007/springerreference_184495 · Cited by 3,071
Levodopa and the Progression of Parkinson's Disease
The Parkinson Study Group (2004) · New England Journal of Medicine · doi:10.1056/nejmoa033447 · Cited by 1,844
Self-citationJENKINSON, C., FITZPATRICK, R., PETO, V., GREENHALL, R., & HYMAN, N. (1997) · Age and Ageing · doi:10.1093/ageing/26.5.353 · Cited by 1,321
Effects of Tocopherol and Deprenyl on the Progression of Disability in Early Parkinson's Disease
The Parkinson Study Group (1993) · New England Journal of Medicine · doi:10.1056/nejm199301213280305 · Cited by 1,222
Fox, S. H., Katzenschlager, R., Lim, S., Barton, B. R., de Bie, R. M. A., Seppi, K., Coelho, M. M., & Sampaio, C. (2018) · Movement Disorders · doi:10.1002/mds.27372 · Cited by 1,009
Self-citationLang, A. E., Gill, S., Patel, N., Lozano, A., Nutt, J. G., Penn, R., Brooks, D. J., Hotton, G. R., Moro, E., Heywood, P., et al. (2006) · Annals of Neurology · doi:10.1002/ana.20737 · Cited by 987
Self-citationEffects of Coenzyme Q10 in Early Parkinson Disease: Evidence of Slowing of the Functional Decline
Shults, C. W. (2002) · Archives of Neurology · doi:10.1001/archneur.59.10.1541 · Cited by 984
A Double-Blind, Delayed-Start Trial of Rasagiline in Parkinson's Disease
Olanow, C. W., Rascol, O., Hauser, R. A., Feigin, P. D., Jankovic, J. J., Lang, A. E., Langston, J. W., Melamed, E., Poewe, W. H., Stocchi, F., et al. (2009) · New England Journal of Medicine · doi:10.1056/nejmoa0809335 · Cited by 902
Self-citationAthauda, D., Maclagan, K., Skene, S. S., Bajwa-Joseph, M., Letchford, D., Chowdhury, K., Hibbert, S., Budnik, N., Zampedri, L., Dickson, J., et al. (2017) · The Lancet · doi:10.1016/s0140-6736(17)31585-4 · Cited by 889
Research works printed but not linked: 1
- Rascol, 2002, A 2-year, multicenter, placebo-controlled, double-blind, parallel-group study of the effect of riluzole on Parkinson's disease progression, Mov Disord, 17, S39
Cited by
Sorted by citations
Monoamine Oxidase-B Inhibitors for the Treatment of Parkinson’s Disease: Past, Present, and Future
Tan, Y., Jenner, P. G., & Chen, S. (2021) · Journal of Parkinson s Disease · doi:10.3233/jpd-212976 · Cited by 247
Phase I trial of hES cell-derived dopaminergic neurons for Parkinson’s disease
Tabar, V., Sarva, H., Lozano, A. M., Fasano, A., Kalia, S. K., Yu, K. K. H., Brennan, C., Ma, Y., Peng, S., Eidelberg, D., et al. (2025) · Nature · doi:10.1038/s41586-025-08845-y · Cited by 181
Natural history of motor symptoms in Parkinson’s disease and the long-duration response to levodopa
Cilia, R., Cereda, E., Akpalu, A. K., Sarfo, F. S., Cham, M., Laryea, R. Y., Obese, V., Oppon, K. J., Sorbo, F. D., Bonvegna, S., et al. (2020) · Brain · doi:10.1093/brain/awaa181 · Cited by 179
Young Onset Parkinson’s Disease: A Modern and Tailored Approach
Post, B., van den Heuvel, L., van Prooije, T. H., van Ruissen, X., van de Warrenburg, B. P. C., & Nonnekes, J. H. (2020) · Journal of Parkinson s Disease · doi:10.3233/jpd-202135 · Cited by 124
Metformin role in Parkinson’s disease: a double-sword effect
Alrouji, M., Al-Kuraishy, H. M., Al-Gareeb, A. I., Ashour, N. A., Jabir, M. S., Negm, W. A., & Batiha, G. E. (2023) · Molecular and Cellular Biochemistry · doi:10.1007/s11010-023-04771-7 · Cited by 104
Metadata
- Authors
- de Bie, R. M. A., Clarke, C. E., Espay, A. J., Fox, S. H., & Lang, A. E.
- Affiliations
- Sandwell & West Birmingham Hospitals NHS Trust (GB)
- University of Cincinnati (US)
- University of Toronto (CA)
- Corresponding author
- Lang, Anthony E
- Venue
- The Lancet Neurology
- Publisher
- Elsevier BV
- Published
- 2020-05
- Volume
- 19
- Issue
- 5
- Pages
- 452-461
- ISSN
- 1474-4422 (ISSN-L)
- OpenAlex
- W3010983304
- Cited by
- 200
- References
- 92
- Citations by year
- 2026: 25 · 2025: 33 · 2024: 36 · 2023: 27 · 2022: 29 · 2021: 37 · 2020: 13
- FWCI
- 2.98
- Type
- journal article
- Language
- en
- Open access
- green
- pure.amsterdamumc.nl
- Licence
- Locations
- The Lancet Neurology (publishedVersion)
- PubMed (publishedVersion)
- Pure Amsterdam UMC (publishedVersion, other-oa)
- Data Archiving and Networked Services (DANS) (submittedVersion)
- University of Birmingham Research Portal (University of Birmingham) (submittedVersion)
- Funders
- Dystonia Medical Research Foundation
- Acadia University
- Bristol-Myers Squibb
- Sunovion
- Roche
- AbbVie Canada
- Medtronic
- Canadian Institutes of Health Research
- Scheme for Promotion of Academic and Research Collaboration
- Fondation Brain Canada
- National Institutes of Health
- Teva Pharmaceutical Industries
- Parkinson Canada
- GE Healthcare
- H. Lundbeck A/S
- Parkinsonfonden
- Sun Pharma
- Ontario Brain Institute
- Michael J. Fox Foundation for Parkinson's Research
- ZonMw
- CHDI Foundation
- Edmond J. Safra Philanthropic Foundation
- Biogen
- Topics
- Health Sciences › Medicine › Clinical Neurology › Parkinson's Disease Mechanisms and Treatments
- Health Sciences › Medicine › Clinical Neurology › Deep Brain Stimulation and Movement Disorders
- Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
- Keywords
- Parkinson's disease, levodopa, early treatment, motor complications, dyskinesia, monoamine oxidase B inhibitors, dopamine agonists, disease-modifying therapy, quality of life, disability, LEAP study, dose titration
- MeSH terms
- Antiparkinson Agents, Humans, Levodopa, Parkinson Disease, Quality of Life, Time Factors, Dopamine Agents, Treatment Outcome
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review