For anyone else reading, baking soda can save you hundreds of dollars on regular antacids. One you get past the taste and train your body it brings relief, it’ll be tasting like champagne soon enough.
LPT: Baking soda and water can burn your mouth and lips after a time as well, so keep it fairly dilute. More is sometimes needed, but not always better.
Second LPT: Get a second small box of baking soda for heartburn use and keep it sealed in a Ziploc or something. It will absorb all kinds of stuff out of the air and end up tasting really bad. (Name-brand baking sodas tend to taste a little less fishy as well, but not by much.)
Sorry, I know more about baking soda now than I care to admit. It’s really a super interesting chemical, even in its simplicity.