My 5 year old daughter has had blood in her stool the last two times she has gone. recently seen family doctor and is on (generic prilosec) for ulcers?

See below: If it was bright red blood in the stool, it is not due to ulcers and Prilosec is not needed. The blood in her stool is likely due to fissures or fragile rectal tissue that bled slightly-commonly associated with harder constipation stools. Another possiblility is a soy/milk protein intolerance-enterocolitis; but rare at 5 and more common in less than 1 yr olds. Ulcer-bleeding = black tarry stools.