Good Morning Yellen, i understand your concerns The abnormal reflux in the esophagus caused by GERD may sometimes bring on ulcers. For this kind of case, proton pump inhibitor drugs like Pantoprazole (Topzole: brand name) is prescribed. Patients using Pantoprazole as a treatment must be aware that concentrations of the drug in the bloodstream may interfere with the results of certain clinical tests. Before undergoing any kind of lab test, you must inform your doctor about your Pantoprazole use. Other side effects of the drug must also be taken up thoroughly with your doctor to ensure that your symptoms do not cause alarm. Pantoprazole may cause constipation, diarrhea, nausea, vomiting, skin rash, and headaches. These adverse effects are temporary. If your symptoms persist or worsen, you must call your doctor immediately. if you didn t experience any adverse effects in the first 6 months of use, it is unlikely that you will have any adverse side efffects in this 6 month repeat presscription. You must remember to take your medicine on schedule to ensure its efficiency. For maximum effect, avoid taking Pantoprazole close to meal time. Take Care. Get well soon :)