This may result in upper abdominal pain, indigestion, loss of appetite, nausea, vomiting and heartburn. Gastroesophageal reflux disease is the most common cause of heartburn. These products are sold as antacids to neutralize stomach acid and relieve indigestion and heartburn. Indigestion is sometimes defined as a combination of epigastric pain and heartburn. This pain can be misinterpreted as hunger, indigestion, or heartburn. Antacids may be prescribed to relieve heartburn and nausea. Other possible symptoms include nausea and vomiting, bloating, loss of appetite and heartburn. It provides relief from heartburn and indigestion ("sour stomach"). Common side effects include joint pain, diarrhea, heartburn, nausea, and muscle pains. Common side effects include nausea and heartburn. Discomfort following an event is common with nausea, heartburn, abdominal cramping, and diarrhea. Common side effects include headache, nausea, easy bruising, itching, and heartburn. Common side effects include dizziness, headache, bruising, allergic reactions, heartburn, and stomach pain. Diarrhea is the main symptom, but others may include weight loss, cramping, bloating, and heartburn. Heartburn or peptic ulcers can develop when these mechanisms fail.