What worked best for my fistualas were Imuran and 6MP. Unfortunately, those drugs also made me feel like crap. When I reduced them enough that I felt better, the fistulas started returning.
Humira helped a little bit. Sometimes they would start to close up, but then would start flaring again. The fistulas were never unbearable, but did hurt and weep at times.
It was SCD that actually healed my fistulas. Don't ask me how, but something on my former diet was aggravating them. Maybe it's because SCD reduces the bad bacteria in your intestines, and that's what allowed them to heal. Don't really know. But after 1 month, they were flat, painless, and no longer weeping, and after 4 months they were closed. My colonoscopy didn't show anything, so they must be healed on the inside too.
I don't think most people's fistualas heal quite that fast on SCD, so it was probably a combo of the diet and the Humira.
34 years old, Crohn's disease for 15 of them
Current Meds: Humira since 7/08, Pentasa, Effexor XR
Supplements: 3 kinds of Fish Oil, Multi-Vitamin, B-Complex, Vitamins D, E, & K, Calcium, Magnesium, Enzymes
SCD since 12/01/08 - eating Stage 3 foods