Head-to-head evidence
Levodopa-carbidopa intestinal gel vs Parcopa
Same mechanism, same race: design-graded trial evidence for both assets, with the grading rationale shown. Grades describe the quality of the evidence, never the merits of either security.
Parkinson's Disease
Shared mechanism: dopamine precursor · full Parkinson's Disease pipeline
Levodopa-carbidopa intestinal gel · Duopa
Marketed by AbbVie
NCT00335153 · Phase 3 · completed
This was a 354-participant, open-label, single-group study with no randomization, blinding, or comparator arm. Its primary outcomes focused on safety and device complications, and there was no formal controlled primary efficacy comparison, so the reported secondary improvements do not establish treatment efficacy.
Parcopa
Marketed by UCB
NCT00139867 · Phase 3 · completed
The study used randomization and a conventional carbidopa/levodopa comparator, but it was open-label and focused on treatment preference rather than a hard clinical outcome. Registry results were not posted at the time of grading; the key result shown was recovered from the cited external source.
Caveat: this result is taken from a company announcement or a news report of one, not from the trial registry or a peer-reviewed publication. Treat the figures as the sponsor's own statement, not as independently verified evidence.
The full competitive landscape for each asset (every same-race competitor with aligned evidence, sortable) is on the asset pages: Levodopa-carbidopa intestinal gel's landscape · Parcopa's landscape