A few notes that I've made :
H2 BLOCKER / ANTACID
You should be able to find these over-the-counter.
Note : They are not considered to be essential.
H2 blockers reduce the amount of acid your stomach makes, whereas antacid neutralises the acid already in your stomach.
Some people believe an antacid may be faster acting and more effective, but opinions vary.
H2 blockers : Tagamet (Cimetidine) / Zantac (Ranitidine), or supermarket own brands of cimetidine / ranitidine.
Antacid : I'm not sure what brand or type to recommend. I've seen Mylanta mentioned, but I can't say whether that's a good choice. Some people have used things such as Rennie.
Many people seem to go with Tagamet or Zantac, so you could just go with one of those.