Head-to-head evidence
foslevodopa/foscarbidopa 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
foslevodopa/foscarbidopa · Vyalev
Marketed by AbbVie
NCT04380142 · Phase 3 · completed
The trial randomized 145 participants to active treatment or an active comparator, with participants, clinicians, investigators, and outcome assessors quadruple-blinded. The primary clinical endpoint was met: least-squares mean improvement in “On” time was 2.72 hours with ABBV-951 versus 0.97 hours with oral carbidopa/levodopa, a difference of 1.75 hours (95% CI 0.46–3.05; p=0.0083).
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: foslevodopa/foscarbidopa's landscape · Parcopa's landscape