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Melena is a form of blood in stool which refers to the dark black, tarry feces that are commonly associated with upper gastrointestinal bleeding. [1] The black color and characteristic strong odor are caused by hemoglobin in the blood being altered by digestive enzymes and intestinal bacteria. [2]
Metronidazole, sold under the brand name Flagyl among others, is an antibiotic and antiprotozoal medication. [10] It is used either alone or with other antibiotics to treat pelvic inflammatory disease , endocarditis , and bacterial vaginosis . [ 10 ]
Causes: Entamoeba histolytica [2] Diagnostic method: Stool examination, antibodies in the blood [2] Differential diagnosis: Bacterial colitis [2] Prevention: Improved sanitation [2] Treatment: Tissue disease: metronidazole, tinidazole, nitazoxanide, dehydroemetine, chloroquine, Intestinal infection: diloxanide furoate, iodoquinoline [2 ...
(Find out the 9 most common reasons why your poop is black.) ... As noted by Dr. O’Connor, certain drugs and supplements can cause the stool to appear pale or clay-like.
Complications of an ulcer can cause severe signs and symptoms such as black or tarry stool indicative of bleeding into the stomach or duodenum; blood - either red or coffee-ground colored in vomit; persistent sharp or severe abdominal pain; dizziness, and a fast heartbeat. [67] [68] Bleeding is the most common complication.
A number of foods and medications can turn the stool either red or black in the absence of bleeding. [2] Bismuth found in many antacids may turn stools black as may activated charcoal. [2] Blood from the vagina or urinary tract may also be confused with blood in the stool. [2]
An infection that affects your gut and triggers diarrhea can also cause green stool. “If you have an infection from bacteria like salmonella, E. coli, ... Red, black, and white poop should be ...
Blood may be observed in vomit or in altered form as black stool. Depending on the amount of the blood loss, symptoms may include shock. Upper gastrointestinal bleeding can be caused by peptic ulcers, gastric erosions, esophageal varices, and rarer causes such as gastric cancer.