Central nervous system: headache (7%), dizziness (2%) Respiratory: upper respiratory tract infection (2%), cough (1%) Gastrointestinal: abdominal pain (5%), diarrhea (4%), nausea (4%), vomiting (3%), flatulence (3%), acid regurgitation (2%), constipation (2%) Omeprazole, sold under the brand names Prilosec and Losec among others, is a medication used in the treatment of gastroesophageal reflux disease, pepticContinue reading “Prilosec , peptic ulcer and GI reflux disease, side effects”