I haven't had vomiting as a symptom but most of the others, especially the IBS, I'v experienced
The only thing that has worked for my IBS has been Pancreatic enzymes and Betain HCL taken with every meal, since I started taking the two iv gone from having around 3 extremely constipated movements per week to having roughly 1 large/well formed BM per day
Iv been gradually getting better as the months have gone by on such a treatment, feeling pretty good these days