Hos patienter med rheumatoid arthritis, psoriasis arthritis og Crohns sygdom tyder det på, at samtidig anvendelse af methotrexat og andre immunmodulatorer reducerer dannelsen af antistoffer mod infliximab og forøger plasmakoncentrationerne af infliximab.
In rheumatoid arthritis, psoriatic arthritis and Crohn's disease patients, there are indications that concomitant use of methotrexate and other immunomodulators reduces the formation of antibodies against infliximab and increases the plasma concentrations of infliximab.