frentizole

Frentizole is a synthetic small molecule classified as a benzimidazoleurea derivative with immunosuppressive and antiviral properties. It was developed and used clinically for the treatment of autoimmune diseases such as rheumatoid arthritis and systemic lupus erythematosus (SLE). Frentizole acts primarily as an immunosuppressant, inhibiting human lymphocyte proliferation in response to certain mitogens. Mechanistically, it is known to inhibit the interaction between amyloid-beta (Aβ) and binding alcohol dehydrogenase (ABAD), with reported activity in this pathway. Clinical studies showed some steroid-sparing effects in SLE but also revealed significant risks including hepatotoxicity and bowel ischemia-necrosis, leading to discontinuation of its development for most indications.