If it's due to regular reflux then most people say that drinking or eating something helps. A piece of gum can increase saliva production which can help as well.
Alternately, you can talk to your doctor about using either chewable or liquid anti-acids such as Tums to help coat the throat and esophagus.
I know for me water does very little to help it helps when going down but then immediately I feel the burn again.
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