In selected patient without any contraendications we use lomotil tablet. 

http://www.rxlist.com/lomotil-drug.htm

We would give topically acting steroids like oral budesonide:

1. Ecker KW, Stallmach A., Seitz G., Gierend M., Greinswald R., Achenbach: V. Oral Budesonide Significantly Improves Water Absorption in Patients with Ileostomiy for Crohn`s Disease. Scand J Gastroenterol 2003; 38: 288 - 293

2.Ecker KW: Stallmach A: Löffler; Greinwald R, Achenbach U.: Long-term treatment of High Intestinal-Output-Syndrome With Budesonide in Patients With Crohn`s Disease and Ileostomy. Dis Colon Rectum 2005; 48:237-42

The patient should measure ileostomy output for 2 days. If over 1200 ml per day, start taking loperamide  up to 16 mg (8 tablets) per day, taken in divided doses before meals and at bedtime.

Eat 6 small meals per day rather than 3 larger ones.

Try limiting fluid intake with meals. Still make sure you are drinking 8-10  cups of fluid per day.

Avoid high fiber foods.

Limit or avoid caffeine and high fat foods.

Completely agree with Taha. Empirically we saw significant improvement with bile acid sequestrants (binding agents)

Loperamide up to 16 mg Qds, oral rehydration solution, Omeprazole up to 40 mg bd, reduce hypertonic fluids, codeine up to 60 mg qds