When my stomach feels sick and I have to vomit, I do following:
1. I prepare a bottle (0,5 l) or a big glass of water and go to toilet.
2. I drink it. At once.
3. Stomach reacts within few seconds.
4. I repeat.
5. After 10-15 minutes of repeating, my stomach has gotten rid of toxins/acidity.
6. I wait another 15-20 minutes (listening to soft music really helps)
7. I drink another bottle/glass to test if stomach is really okay.
8. I everything works, I am done.
Instead of spending all night in sickness I am done in 20 – 30 minutes usually
By the way, I do not drink mineral waters if it is possible, because water in our well is strongly mineralized (especially with Calcium). Actually most waters in Slovakia are very mineralized.