Here is the full dvla list. If you click on the condition is tells you which license it's applicable to.
https://www.gov.uk/health-conditions-and-driving
https://www.gov.uk/health-conditions-and-driving
I never suffered with Heartburn bad enough to really cause problems, just a nuisance more then anything. It was suggested to me to try tea made from various Mints, which fortunately I quite enjoy especially the Lemon Balm and Peppermint....I genuinely do not know how well or even if they actually work at all but Heartburn is something that I have not suffered from now for several years. I do know that Coffee, Tea, and other drinks and foods can aggravate heartburn so it certainly didn't hurt to replace at least a couple of cups a day with the mint tea. You can buy the various dried herbs but in truth it's hard to stop them taking over if you grow them for yourself. They also have a multitude of other uses from food additives to insect (including midge/mosquito) repellants.
D.B.