The side-effect the client can face using over-the-counter bismuth product is appearance of a dark tongue or dark stool.
Over-the counter-bismuth products are available without prescriptions. They are usually used to treat indigestion, diarrhea, heartburn, nausea, etc. The major product is bismuth subsalicylate. Thus they are the antacids and antidiarrheals.
Tongue is an organ of the digestive system that helps in the various activities. It is involved in the swallowing of food, in speaking and in recognition of taste. The taste is identified by the taste buds present almost all over the tongue at different locations.
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