Levodopa, also known as L-DOPA, is the metabolic precursor of dopamine and the cornerstone pharmacological treatment for Parkinson's disease, a disorder marked by the degeneration of dopaminergic neurons and a resulting deficit of striatal dopamine. Because dopamine itself cannot cross the blood-brain barrier, levod…
Levodopa, also known as L-DOPA, is the metabolic precursor of dopamine and the cornerstone pharmacological treatment for Parkinson's disease, a disorder marked by the degeneration of dopaminergic neurons and a resulting deficit of striatal dopamine. Because dopamine itself cannot cross the blood-brain barrier, levodopa is administered to be transported into the brain and converted to dopamine by the enzyme aromatic L-amino acid decarboxylase, restoring dopaminergic signaling and improving motor symptoms such as bradykinesia, rigidity, and tremor. To limit peripheral conversion and the associated side effects, levodopa is routinely combined with a peripheral decarboxylase inhibitor such as carbidopa, which increases the fraction reaching the central nervous system. Long-term therapy is complicated by motor fluctuations, including wearing-off and dyskinesias, prompting strategies such as adjusted dosing, alternative delivery routes, and adjunctive agents. Continuous infusion approaches, including subcutaneous and intestinal formulations, and other dopaminergic therapies such as apomorphine are used in advanced disease to provide more stable drug levels. Research surrounding levodopa addresses its interaction with disease progression, impulse control and other behavioral effects of dopaminergic stimulation, and comparative efficacy of delivery methods. As a dopamine replacement that acts on the same neurotransmitter systems implicated in movement and reward, levodopa remains central to managing Parkinsonian symptoms across disease stages.
5 peer-reviewed articles, ranked by relevance. Each links to its DOI.
The 5 articles above have been cited 10 times in the scholarly literature. Citation data via OpenAlex and Crossref, updated Jun 2026.
A sample of recent works citing this journal's research on Levodopa, linking to each citing work.