Lansoprazole Is A Proton Pump Inhibitor (PPI) That Is Used To Treat Gastroesophageal Reflux Disease (GERD) And A Variety Of Other Gastrointestinal Disorders. It Works By Decreasing The Amount Of Acid Produced In The Stomach, Which Helps To Reduce Symptoms Such As Heartburn, Indigestion, And Discomfort. Lansoprazole Is Available Both Over-The-Counter And By Prescription. Lansoprazole Is Generally Safe And Effective When Taken As Directed, But It Can Cause Side Effects Such As Headaches, Nausea, Abdominal Pain, And Diarrhoea. It May Also Interact With Other Medications, So Make Sure To Tell Your Doctor About All Drugs And Supplements You Are Taking Before Taking Lansoprazole. Lansoprazole Is An Important Tool In The Treatment Of GERD And Other Gastrointestinal Disorders, But It Should Only Be Used Under The Supervision Of A Doctor. If You Have Any Questions Or Concerns About Lansoprazole, Talk To Your Doctor Before Taking It.