I take sulfasalazine, as do a number of people here. I found it far more effective than Asacol for intestinal symptoms, and it has the added benefit of working on joint pain, too. First time in at least fifteen years I haven't had joint pain.
I had a mild headache for the first two weeks when I started but, other than that, haven't had any other side effects. I understand you can start at a low dose and work up, which will help with any side effecs.
And you can't beat the price.