Fecal Occult Blood Test

For 72 hours before stool collection, avoid laxatives, rectal suppositories and oils, and limit (as agreed with your doctor) medications that affect bowel motility (belladonna, pilocarpine, etc.) and stool color (iron, bismuth, barium sulfate). Perform the test before sigmoidoscopy or other diagnostic procedures on the intestine or stomach. Do not collect samples during menstruation, with bleeding hemorrhoids, blood in the urine, or after straining at stool.