Lynn,
My doctor lists Emetrol, vitamin B6, and unisom as safe to take for nausea. She lists Tums as safe to take for heartburn and indigestion. I have found that peppermints, lemon drops, and ginger candy help a little with nausea, but I’m not sure about indigestion (actually I bet ginger would help). I don’t know much about the antacid you listed. I do know that the pregnancy books I have read have warned about herbal teas and herbal remedies. I would ask your doctor before taking anything you have a question about.
Kate