I'm no expert on methotrexate, as far as why go IV versus pill form.
So, I'd ask on the Crohn's board as they use it a lot more extensively than us UCers do. Methotrexate is a common Crohn's drug.
/www.healingwell.com/community/default.aspx?f=17I do know that MTX is a very fast working immunomodular, unlike the imuran/6mp which take forever to work...