Methotrexate and Leflunomide combination in RA/PsA: Is it safe? Save I asked the EULAR Twitter community about the combination of Methotrexate (MTX) and Leflunomide (LEF). Opinions are split, with 50% prescribing it often and 50% concerned about side effects. In my practice, https://t.co/SZjLaEH1h2