Head-to-head evidence
Crexont (IPX203) vs Levodopa-carbidopa intestinal gel
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
Crexont (IPX203)
Marketed by Amneal Pharmaceuticals
NCT03670953 · Phase 3 · completed
The study was randomized, quadruple-blind, double-dummy, and active-controlled, with 506 participants entering the randomized maintenance period and 495 contributing primary-endpoint data. The clinical primary endpoint was met: IPX203 produced a significantly greater improvement in daily “good on” time than immediate-release carbidopa-levodopa (p=0.0194).
Next expected readout: December 2026 · NCT07138560 (registry estimate)
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.
The full competitive landscape for each asset (every same-race competitor with aligned evidence, sortable) is on the asset pages: Crexont (IPX203)'s landscape · Levodopa-carbidopa intestinal gel's landscape