Actarit is primarily used in the treatment of autoimmune and inflammatory conditions, particularly rheumatoid arthritis. It functions by modulating the immune response, specifically suppressing the activation and proliferation of T-lymphocytes, which play a key role in autoimmune reactions. This immunomodulatory effect helps reduce joint inflammation, slow disease progression, and alleviate symptoms such as pain and swelling. Actarit is considered beneficial for patients who do not respond well to conventional therapies, offering an alternative with a relatively favorable safety profile. It has been studied in clinical settings for its ability to improve physical function and quality of life in chronic inflammatory diseases.