Common side effects associated with taking omeprazole include stomach pain or gas, nausea, vomiting, diarrhea, and headache, states Drugs.com. People who take omeprazole and experience severe stomach pain, diarrhea that is bloody or watery, seizures, kidney problems or symptoms of low magnesium should call a doctor.
When this medication is taken for long periods of time or at high doses, it may increase the risk for fracture of the hip, spine or wrist, according to Drugs.com. This is particularly notable in adults over the age of 50. The normal adult dose of omeprazole is 20 milligrams once per day, although the dosage amount varies depending on what medical condition a person has. Typically, patients take this dose by mouth before a meal. In the majority of cases, healing occurs in a four- to eight-week period. Omeprazole is a proton pump inhibitor that works by reducing the amount of acid that is produced in the stomach.
As of 2015, it is not currently clear whether this medication causes harm to unborn babies, states Drugs.com. Omeprazole passes from breast milk to a nursing infant, which may potentially cause harm to the baby. Pregnant and nursing mothers should not take this medication without speaking to a physician.