Taking omeprazole stomach pain may be vomiting water symptoms, but some patients may also simply have stomach pain symptoms. Omeprazole belongs to a proton pump inhibitor, mainly for gastritis, peptic ulcer, reflux esophagitis and other pain caused by symptoms, the effect is relatively good. Taking omeprazole stomach pain, vomiting water may be due to the drug did not work, drug side effects, or is itself suffering from cholecystitis, pancreatitis, appendicitis and other reasons. Due to the different causes of the disease, the patient’s physical condition is different, so there is also variability in the symptoms. After taking omeprazole, the symptoms of stomach pain, vomiting water, it is recommended to go to the hospital in a timely manner, to clarify the cause of the disease, and follow the doctor’s instructions on the cause of the treatment.