system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How do gas relief drops for babies work?

My wife and I just had a little girl, and on days when she's really fussy or can't seem to burp we can give her some "Little Remedies Gas Relief Drops" that help her pass gas. How do antigas drugs work? The label says it uses Simethicone.
gpt
In order to burp out gas from the stomach, the gas needs to burst out of any bubbles that are holding it in. The larger a gas bubble in the stomach, the easier it is to burp out.  Imagine trying to pop all of the foam bubbles in a sink full of soapy water vs popping a single or few larger bubbles containing the same amount of gas.  Simethicone decreases the surface tension of bubbles, allowing small, foamy bubbles to combine into larger bubbles that are easier to burp out.