Evidence map›Paper›PMID 34366380›Full record

Trial reportJournal of Parkinson's disease2021

Foslevodopa/Foscarbidopa Is Well Tolerated and Maintains Stable Levodopa and Carbidopa Exposure Following Subcutaneous Infusion.

Matthew Rosebraugh, Wei Liu, Melina Neenan, Maurizio F Facheris

Open access · bronzeAbstract readRandomized Controlled Trial
In one paragraph

Trial report in Journal of Parkinson's disease, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 46 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
46citing papers in PubMed, 2 pooled it
3.8field-weighted citation impact, top 5% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

46 citing papers in PubMed, 2 syntheses or guidelines pooled it, 62 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
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  4. Trial
  5. Article
  6. Review
  7. Article
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  13. Article
  14. Device aided therapies in Parkinson disease: an expert view on apomorphine.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2026
    Review
  15. Observational
  16. Review
  17. Article
  18. Article
  19. Article
  20. Advanced Therapeutics in Parkinson's Disease: What's New?Current neurology and neuroscience reports · 2026
    Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

4 authors at 1 institution in 1 country.

Matthew RosebraughClinical Pharmacology and Pharmacometrics, AbbVie, North Chicago, IL, USA.
Wei LiuClinical Pharmacology and Pharmacometrics, AbbVie, North Chicago, IL, USA.
Melina NeenanDrug Metabolism and Pharmacokinetics - Bioanalysis, AbbVie Inc., North Chicago, IL, USA.
Maurizio F FacherisNeuroscience Development, AbbVie, North Chicago, IL, USA.
AbbVie (United States) · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundFoslevodopa/foscarbidopa, formerly known as ABBV-951, is a formulation of levodopa/carbidopa prodrugs with solubility that allows for subcutaneous (SC) infusion and is in development for the treatment of motor complications for patients with advanced Parkinson's disease (aPD).

objectiveThe current work characterizes the levodopa (LD) and carbidopa (CD) pharmacokinetics (PK) following SC infusions of foslevodopa/foscarbidopa delivered at four different infusion rates in PD patients.

methodsThis was a Phase 1, single ascending dose, single-blind study conducted in 28 adult male and female subjects at seven sites in the United States. Foslevodopa/foscarbidopa was administered via abdominal SC infusion in PD patients over 72 hours. Patients were stratified in 4 groups and received a fixed dose of foslevodopa/foscarbidopa based on their oral daily LD intake. Serial plasma PK samples were collected to assay for LD and CD concentrations. Safety and tolerability were assessed throughout the study.

resultsLD exposure quickly reached steady state and remained stable with minimal fluctuations. Foslevodopa/foscarbidopa infusion provides stable LD and CD exposures compared to oral LD/CD dosing with the average steady-state exposure ranging from 747-4660 ng/mL for the different groups.

conclusionFoslevodopa/foscarbidopa was able to provide stable LD and CD exposures in PD patients over 72 hours via SC route of delivery with very low fluctuation in LD concentration level across a wide range of clinically relevant exposures. Foslevodopa/foscarbidopa had a favorable safety profile. The low PK fluctuation following foslevodopa/foscarbidopa infusion is expected to maintain LD exposure to treat aPD patients within a narrow therapeutic window.

Indexed as

CarbidopaParkinson DiseaseAdultAntiparkinson AgentsDopamine AgonistsDrug CombinationsFemaleHumansInfusions, SubcutaneousLevodopaMaleSingle-Blind MethodAntiparkinson AgentsCarbidopaDopamine AgonistsDrug CombinationsLevodopacarbidopaLevodopaParkinson’s diseasepharmacokinetics

Identifiers

PMID34366380
PMCPMC8609688
OpenAlexW3189759184

What OpenQuestion holds

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LicenceCC BY-NC
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.