Background: The treatment of autoimmune hepatitis (AIH) with prednisone and azathioprine provides disease remission. However, a complete biochemical and histological response is unreachable in most patients. Chloroquine is an antimalarial drug used for treating rheumatological diseases. It was studied as a single drug for the maintenance of AIH remission in an open study, which suggested a lower risk of relapse in the chloroquine group. Aims: To evaluate a possible role of chloroquine and prednisone for AIH treatment in a randomized study. Methods: 57 AIH adult patients with indication of treatment were enrolled to receive azathioprine or chloroquine, both with varying doses of prednisone, from 2003 to 2012. For those who had maintained biochemical remission for 18 months, liver biopsy was performed to evaluate histological remission. The primary outcome was the achievement of complete response to treatment. A p-value < 0.05 was considered statistically significant. Results: There were no significant differences between the groups concerning clinical, serological, histological, and treatment features at baseline. The average age was 37.2 ± 16.84 years, 43.8% with advanced fibrosis (F3/4) at baseline. There was no statistical differences in biochemical (67.7% vs. 53.8%, p=0.41) or histological response rate (32.26% vs. 15.38%, p = 0.217), as well as in the mean prednisone dose. There was a higher rate of adverse effects in the chloroquine group, but a lower frequency of comorbidities in this group. Conclusion: When well tolerated, chloroquine with prednisone provided a complete therapeutic response in AIH patients with no statistical difference when compared to the standard treatment. (ClinicalTrials.gov NCT 02463331).