Antidiarrheals are divided into two types: antispasmodic antidiarrheals which slow the spasms in the intestines which cause diarrhea and thickening mixtures, which thicken the stools.
Regular Websites
Gasteoenterologists offer data about psyllium, by the brand name Fiberall, the possible side effects, dosages, and indications for use. - Fiberall: Psyllium
http://www.gicare.com/Medications/Medications.aspx?CID=6&ID=83
Delves into details about ioperamide, which is marketed under the brand names Kaopectate II, Imodium, Maalox, and Pepto Diarrhea Control and includes information about the drug class and mechanism, various available preparations, and dosing instructions. - Medicine Net: Ioperamide
http://www.medicinenet.com/loperamide/article.htm
Offers the comprehensive history of psyllium, its uses, and how to grow it oneself. - Psyllium
http://www.hort.purdue.edu/newcrop/AFCM/psyllium.html