If you want to avoid medications try a teaspoon of Slippery Elm powder (health food store or organic grocer) in a glass of warm water - must drink before it turns to 'glue' - tastes pretty 'gritty' too but it certainly works
If it's really bad take 1/2 teaspoon of baking SODA (not powder!) in warm water first to neutralise the acid then the Sliper Elm on top of that. Milk also neutralises the acid that's why it seems to do the trick.