I have also had that feeling of way to many 5hr drinks in a day and tried to mix in a redbull, frappuccino or other type of cold coffee. This did help with that heartburn feeling going away. I also started to drink the ginger and chew on a little of the raw root and things seem to be going well with that.
The 5hr shots do work well along with the oxygen and do not keep me up even if I take one at 3am.