* mild immunosuppressive/immunomodulatory medication in pill form

    * good safety profile, but some risks require consideration and monitoring

    * first dose usually give in doctors office

    * 1:200 risk of eye (macula) swelling

    * 1:200 risk of symptoms with slow heart rate on first dose

    * Need to have had chickenpox or vaccine at least 30 days before

    * Monitor for liver stress

    * Need bullet-proof reliable contraceptive