Omeprazole may cause some adverse effects, including stomach, back, leg and joint pain. Individuals taking omeprazole may also experience bloody or cloudy urine, painful urination, and a frequent urge to urinate, states Mayo Clinic. Likewise, omeprazole may cause loss of appetite, sore throat, chills, malaise, fever and muscle cramps. Those who experience any of the adverse effects of omeprazole should immediately seek medical attention.
Omeprazole is a proton pump inhibitor. It reduces the production of gastric acid, explains Drugs.com. Omeprazole is used in the treatment of gastroesophageal reflux disease. It is also used to treat other conditions resulting from the excess production of gastric acid. Omeprazole also may be prescribed, along with antibiotics, to treat stomach ulcers caused by a Helicobacter pylori infection.
Omeprazole should not be taken by people who are allergic to it or any benzimidazole medication, notes Drugs.com. Those with liver disease, low levels of magnesium in the blood and osteoporosis should not take omeprazole without the advice of their health care provider. Breastfeeding women are also discouraged from taking omeprazole without consulting a doctor.
Omeprazole may cause side effects that do not typically require medical attention. These effects normally disappear as the body adjusts to the medication, clarifies Mayo Clinic. Side effects of omeprazole include constipation, diarrhea, heartburn, dizziness and drowsiness. Some people may develop a runny nose, cough, and ear or nasal congestion.