doctors have been prescribingdecade, nexium to patients just like you. for many, prescription nexium helps heal acid-related erosions in the lining of the esophagus. there is risk of bone fracture and low magnesium levels. side effects may include headache, abdominal pain, and diarrhea. if you have persistent diarrhea, contact your doctor right away. other serious stomach conditions may exist. avoid if you take clopidogrel. nexium 40 mg is only available by prescription. talk to your doctor. for free home delivery, enroll in nexium direct today.