Head to Settings and tap on the More tab at the end of the Wireless & networks tab. Step #1. image. Once inside, swipe to the bottom and hit the Emergency broadcasts button.
I have also heard that drinking peppermint tea (herbal) is good.The time it takes for the body to eliminate one half of a caffeine dose is normally between 3 to 12 hours. It is called the half-life of caffeine. Source(s): http://www.coffeefaq.com/site/node/127. seashells Â· 7 years ago. Thumbs up.
The effectiveness of caffeine varies significantly from person to person, due to genetics and other factors in play. The average half-life of caffeineâthat is, how long it takes for half of an ingested dose to wear offâis about five to six hours in a human body.