Rezdiffra® With Concomitant Therapies Commonly Used to Treat Comorbidities in Adults With MASH and F2-F3 Fibrosis

This Phase 4 study will evaluate the safety and tolerability of REZDIFFRA® (resmetirom) when used in combination with concomitant therapies commonly used to treat diabetes in adults with metabolic dysfunction-associated steatohepatitis (MASH) and noncirrhotic, moderate-to-advanced (F2-F3) fibrosis. The concomitant therapies evaluated in this study will include ACTOS®/pioglitazone and FARXIGA®/dapagliflozin. All study medications will be administered according to their approved labeling.

Participants will be assigned to one of six cohorts based on their existing therapy and the concomitant medication being evaluated. In Group A, participants who are receiving a stable dose of pioglitazone or dapagliflozin will initiate resmetirom. In Group B, participants who are receiving a stable dose of REZDIFFRA will initiate pioglitazone or dapagliflozin. In Group C, participants who are not currently receiving either treatment will initiate resmetirom and either pioglitazone or dapagliflozin in a staggered manner, with a 4- to 6-week run-in period between initiation of the first and second medications.

Approximately 25 participants are planned for each of the six cohorts, for a maximum planned enrollment of approximately 150 participants. Following initiation of combination treatment, participants will be followed for 24 weeks, with a safety follow-up visit approximately 4 weeks after completion of treatment.

Safety and tolerability will be characterized through assessment of treatment-emergent adverse events, physical examinations, vital signs, clinical laboratory parameters, treatment discontinuations, and dose interruptions or reductions. Exploratory assessments will evaluate changes in liver fat by MRI-PDFF, noninvasive measures of hepatic steatosis and fibrosis, and biomarkers related to MASH disease state, insulin resistance, glucose homeostasis, body weight, and liver function.