Bismuth subsalicylate (BSS) is considered effective in treating peptic ulcers, as it not only treats the symptoms but the cause, at the same time it treats the ulcer symptoms, it also eliminates Helicobacter pylori.

Indigestion may also be effectively treated with BSS because of its strong and rapid protective effect on the gastric mucosa. The salicylate component of this substance and not bismuth alone is responsible for the elimination of diarrhoea in the so-called traveller's diarrhoea, as it decreases secretion of fluid in the colon.

Natural fibre, psyllium, is commonly used as a natural remedy for constipation as its seeds (and husks) speed up transit time and help promote bowel movements by increasing the volume and weight of stools. Docusate sodium, a detergent agent, works in a different way by enabling water to be absorbed by the stool, which in turn aids the large intestine in pushing it out.

Pharmacists recommend bismuth subsalicylate, psyllium, and docusate sodium because they are safe and effective in their treatment of diarrhoea, ulcers and other gastrointestinal complaints.