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خرید پکیج
تعداد آیتم قابل مشاهده باقیمانده : -3 مورد

Common foods and drugs that can cause stool to appear bloody

Common foods and drugs that can cause stool to appear bloody
Red coloration, similar to fresh blood
  • Certain antibiotics*
  • Medications or foods with red coloring (eg, some formulations of liquid acetaminophen or ibuprofen)
  • Beets, tomatoes, cranberries
  • Flavored gelatin (red colored)
  • Kool-Aid or fruit punch (red colored)
  • Red licorice, candy, frosting
  • Red-dyed snack foods (eg, spicy "red-hot" snacks)
Black coloration, similar to melena
  • Bismuth preparations (Pepto-Bismol, Maalox, Kaopectate)
  • Iron supplements
  • Activated charcoal
  • Chocolate
  • Black licorice
  • Blueberries
  • Large quantities of some dark green foods
False-positive results to fecal occult blood test
  • Rare red meat
  • Peroxidase-containing vegetables (turnips, horseradish, broccoli, cauliflower, and cantaloupe)
  • Iron supplements

* Several reports have described cases of very red-appearing stools associated with cefdinir, apparently caused by an interaction with iron supplements or iron-containing infant formula[1-3]. Rifampin can cause orange discoloration of stools as well as urine. Other antibiotics in red vehicles (eg, cherry syrup) may cause a red tint to the stool, especially in infants or others with a fast transit time. Antibiotics can also trigger true gastrointestinal bleeding (Clostridioides difficile colitis). Therefore, red-appearing stools should be evaluated with guaiac or other tests for blood.

¶ Oral iron supplements cause false-positive results for some traditional kits for occult blood testing. However, this is not the case for contemporary test kits (eg, Hemoccult II, Hemoccult Sensa, HemoQuant).

References:
  1. Lancaster J, Sylvia LM, Schainker E. Nonbloody, red stools from coadministration of cefdinir and iron-supplemented infant formulas. Pharmacotherapy 2008; 28:678.
  2. Roath MC, Di Palma JA. Cefdinir and red stool. Gastroenterology and Hepatology 2013; 9:338.
  3. Graves R, Weaver SP. Cefdinir-associated "bloody stools" in an infant. J Am Board Fam Med 2008; 21:246.
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