Question: is methotrexate fda approved for psoriatic arthritis?
Answer: MTX was approved by the U.S. Food and Drug Administration (FDA) in 1972 for use with severe psoriasis (which is often related to psoriatic arthritis), but it's also been widely used “off label” for PsA. “Off label” means your doctor can prescribe it for diseases other than the FDA-approved one.