Over the years many trials have undertaken the task of finding a single drug or drug combination to treat or prevent NASH. None, have been successful resulting in an FDA approval. In the trial you reference:
NCT02781584, A study of the Safety, Tolerability, and Efficacy of Selonsertib, Firsocostat, and Cilofexor in Adults With Nonalcoholic Steatohepatitis (NASH). There were 13 Cohorts (Arms) in this trial consisting of various combinations of drugs. VASCEPA was in Cohort #12:
Experimental: Firsocostat + Cilofexor 30 mg + Vascepa® 4 g (Cohort 12)
Pre-treatment with Vascepa® (2 x 1 g tablet twice daily) from Day -14 to Day -1. Then, treatment with Firsocostat (1 x 20 mg tablet once daily) + Cilofexor (1 x 30 mg tablet once daily) + Vascepa® (2 x 1 g tablet twice daily) for 6 weeks
The results were submitted to ClinicalTrials.gov on January 4th but have not been published. I heard a rumor that all cohorts failed to meet endpoints. We will see.