What happened if you accidentally swallow Listerine for a half of the cap?

Swallowing a small amount of Listerine, such as half a capful, is generally not harmful, but it can cause nausea or an upset stomach due to its high alcohol and menthol content. Listerine is meant for external use and should not be ingested in large quantities. If you experience any concerning symptoms or if you have swallowed a larger amount, it's best to contact a medical professional for advice. Always read the label for guidance on proper use.