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.
Onset and Duration. It takes approximately 15 to 45 minutes for caffeine to reach its peak levels in your bloodstream. Caffeine has a half-life of approximately five to six hours, meaning that it takes this long for its concentration in your bloodstream to reduce by half.nset and Duration. It takes approximately 15 to 45 minutes for caffeine to reach its peak levels in your bloodstream. Caffeine has a half-life of approximately five to six hours, meaning that it takes this long for its concentration in your bloodstream to reduce by half.