Proton pump inhibitors are among the most sold medicines. They are used to inhibit the production of stomach acid. Due to this feature, they are for the treatment of heartburn as well as stomach and duodenal ulcers suitable. Among the most common counter heartburn active substances used omeprazole and pantoprazole. The taking of such drugs is often associated with minor side effects such as gastro-intestinal complaints, tiredness, dizziness, or headache. You can inform yourself here in detail about the effects and side effects of proton pump inhibitors.