Head-to-head evidence
Crexont (IPX203) vs Rytary (IPX066)
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)
Rytary (IPX066)
Marketed by Amneal Pharmaceuticals
NCT00974974 · Phase 3 · completed
This was a randomized, quadruple-blind, active-controlled phase 3 trial with 393 randomized participants. The primary clinical endpoint—percentage of waking hours spent in the Parkinsonian “off” state—favored IPX066 over immediate-release carbidopa-levodopa and was statistically significant (p<0.0001).
The full competitive landscape for each asset (every same-race competitor with aligned evidence, sortable) is on the asset pages: Crexont (IPX203)'s landscape · Rytary (IPX066)'s landscape