This is the only thing I keep in my medicine cabinet for upset stomachs. It works wonders for everything. I have severe stomach ulcers, and I would take a swig of it before I ate and wouldn't feel a thing. It calms an upset stomach in no time. Effectiveness Awesome product. I like the liquid version better than the tablets because I don't like the chalky texture. Granted the liquid still tastes chalky, liquid goes down faster and easier than chewing up tablets. Immediacy Relieved pain and indigestion within 5 minutes, and also prevented any indigestion or upset stomach before eating.