Lymphocytic and collagenous colitis

Opinion statement  

–	Patients with symptomatic collagenous-lymphocytic colitis should eliminate dietary secretagogues such as caffeine- or lactose-containing food from their diet. When possible, use of nonsteroidal anti-inflammatory drugs should be discontinued.
–	If steatorrhea is documented, a low-fat diet may be helpful. In the presence of bile salt malabsorption, binding resins such as cholestyramine might be useful.
–	Nonspecific diarrheal agents such as loperamide hydrochloride, diphenoxylate hydrochloride and atropine, deodorized tincture of opium, or codeine might prove effective in some patients.
–	Antibacterial agents such as bismuth subsalicylate (8 chewable 262-mg tablets daily) have been effective in symptom control. Metronidazole and erythromycin achieve response rates of 60%.
–	Sulfasalazine, at the usual dose of 2 to 4 g daily, used in collagenous-lymphocytic colitis, demonstrated cessation of diarrhea in 1 to 2 weeks for 50% of patients. Other 5-aminosalicylic (5-ASA) compounds are preferred for patients with a history of sulfa allergy, and those who experience adverse reactions to sulfasalazine.
–	Adrenocorticoid medication is reserved for patients whose conventional treatment with sulfasalazine or 5-ASA has failed. Resolution of diarrhea has been documented in 80% to 90% of patients within 1 week of treatment, however, in most patients, long-term therapy is required.
–	Surgical management is reserved for those patients with disease refractory to medical therapy. Colectomy with ileostomy resulted in clinical and histologic resolution in small case series.
–	If there is no abatement of symptoms, rule out other etiologies of diarrhea such as thyroid dysfunction, celiac disease, or bacterial overgrowth.