The CCFA website has the most complete info I've found about UC meds. Here's a link that talks about sulfasalazine. It's a 5ASA like Asacol, Lialda, etc, but is an "older" form that more people have trouble tolerating.
6mp is an immunomodulator that is similar to azathioprine. I posted a link to the CCFA's info about it.
What all meds have you tried? If you're on Humira, I assume you've been through just about everything else?
Status: Remission since late May 2009!
Symptoms began in November 2008, ~4 weeks after giving birth to my son.
Eased for ~3 weeks in December, possibly b/c of probiotic use?
Returned in January 2009 (with a vengeance), diagnosed with pancolitis on January 30.
Currently taking Asacol (400mg 4 pills 3x daily), Rowasa twice weekly, Culturelle probiotic, and Zoloft (25 mg).