Head-to-head evidence
foslevodopa/foscarbidopa vs WD-1603
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).
WD-1603
Developed by Hong Kong WD Pharmaceutical Co., Limited
NCT05036473 · Phase 2 · completed
This randomized, double-blind, placebo-controlled Phase 2 trial in early Parkinson's disease enrolled only 40 patients across three dose groups and placebo. All three doses of WD-1603 produced a statistically significant improvement in combined motor and daily-living function scores versus placebo at 27 days, with the largest effect at the highest dose (p=0.0003), but the very small sample size means these results need confirmation in a larger trial.
The full competitive landscape for each asset (every same-race competitor with aligned evidence, sortable) is on the asset pages: foslevodopa/foscarbidopa's landscape · WD-1603's landscape