Acid Reflux/Heartburn/GERD...all the same thing, or at least caused by the same thing.
Zantac is what's known as an H2 Blocker and used to be a prescription med. It was introduced before Prevacid, Nexium, and the other PPI's.
Definitely take it and see if it helps. Augment it with chewable Maalox or Tums if you really need to. And if Zantac doesn't work you could try Pepcid.