You're asking about simethicone tablets (chemical name). Buy a bottle of 50 or 100 tablets generic, unless you like to throw away money. They're handy to break down gas bubbles that cause pain or flatulence.
You can probably eat 8 a day if you like. There are no side effects. I use them a few times a year, too much saurekraut or something. Give them to your significant other when needed.