Abstract:Objective To evaluate the clinical efficacy of prednisolone combined with magnesium isoglycyrrhizinate in patients with autoimmune hepatitis (AIH), its effects on oxidative stress markers, and its efficacy relative to prednisolone combined with azathioprine and prednisolone monotherapy.Methods A total of 92 patients diagnosed with AIH at the General Hospital of the Eastern Theater Command of the Chinese People's Liberation Army between January 2022 and December 2024 were randomly divided into an observation group (prednisolone plus magnesium isoglycyrrhizinate, n = 31), a standard control group (prednisolone plus azathioprine, n = 31), and a monotherapy group (prednisolone alone, n = 30). Changes in liver function, immunoglobulin G (IgG), and oxidative stress markers were compared among the three groups before and after treatment. Clinical efficacy, time to steroid dose reduction, time to normalization of alanine aminotransferase (ALT), and biochemical relapse were also analyzed.Results After 24 weeks of treatment, ALT, aspartate aminotransferase (AST), total bilirubin (TBil), and IgG levels were lower than baseline in all three groups (P < 0.05). Post-treatment ALT, AST, TBil, and IgG levels were lower in the observation group than in the monotherapy group (P < 0.05). After treatment, malondialdehyde (MDA) levels decreased, whereas superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px) levels increased, in all three groups (P < 0.05). Post-treatment MDA levels were lower and SOD and GSH-Px levels were higher in the observation group than in the standard control and monotherapy groups (P < 0.05). The times to steroid tapering and ALT normalization were shorter and the time to relapse was longer in the observation group than in the monotherapy group (P < 0.05). Overall response, complete biochemical remission, and biochemical relapse rates did not differ significantly among the three groups (P > 0.05).Conclusion Prednisolone combined with magnesium isoglycyrrhizinate improves liver function and immune abnormalities in patients with AIH, accelerates steroid tapering, and delays relapse. Its effects may be associated with improved oxidative stress status, supporting its use as an optional adjunctive treatment for AIH.