In reply to Flinticus:
Depends on what you describe as indigestion, what the cause is, how bad it is and how it affects you. If your are not sure of the cause, see a GP. You may need a gastroscopy.
Besides lifestyle changes, which I assume you have tried (see NHS website if not), antacids and proton pump inhibitors are the two usual treatments afaik. I used to have Omeprazole for a few years, but now on Lansoprazole (both are PPIs on prescription) and it’s excellent. It is a long term use dose I’m on now. When things started and symptoms were minor, I could cope with the likes of Gaviscon (other antacids are available over the counter, Tesco’s one was good!) which was ok for milder symptoms and for occasional use for some folk. After an op however I had little option, but to go on PPIs.