Chronic inflamatory bowel disease (IBD) refers to two diseases: Crohn's dis
ease (CD) and ulcerative colitis (UC). The etiology of IBD remains unknown.
The understanding of the pathogenesis has expanded greatly over the last d
ecade. The combination of genetic risk factors, abnormalities in the immune
system, vascular and neural factors, and random environmental factors may
all play an important role. Most treatments currently in use have multiple
action. The choice of appropriate medical treatment is determined by the st
atus (inductive or maintenance therapy) and severity of the disease and the
potential for toxicity. Despite the variety of medical therapies available
for the treatment of IBD, none is ideal. Ongoing research into the well-es
tablished drugs, as well as novel agents with more precise targets, may con
tribute to an optimal therapy of IBD in the near future. In this paper the
current (5-aminosalicylates, glucocorticosteroids, thioguanine derivatives,
methotrexate, cyclosporin and infliximab) as well as some of the new (myco
phenolate mofetil and thalidomide) therapeutic options are reviewed.