My girlfriend periodically has excessive amounts of saliva. So much so that she has to spit almost constantly when it happens and it sometimes makes her feel like she s going to vomit. Only when it s really bad does she feel like she s going to vomit, and the nausea is accompanied by involuntary, large burps. To my knowledge, there s nothing she s taken that s made it go away other than laying a towel down until she falls asleep. Upon waking, it s usually gone away. We ve only tried tums so far, under the assumption it may be heartburn, though she has no other symptoms when it comes about related to heartburn. The only other odd thing I could add is that she doesn t typically burp. Not the way I do at least. It s more like an involuntary growling noise from her throat while laying in a certain position.