\- Methotrexate was indeed a common and effective treatment for rheumatoid arthritis, psoriatic arthritis and psoriasis. Methotrexate-related hepatotoxicity are common occur 1:1,100 persons. Liver abnormalities varies from asymptomatic liver enzyme elevation to fatal hepatic necrosis and liver fibrosis. Methotrexate was discontinued owing to liver dysfunction in 7.4%
