-Common physical reactions include dilated pupils, dry mouth, loss of appetite, an increase in body temperature and insomnia.
-your mouth will probably dry, you may want to grind your teeth or chew the same piece of chewing gum for 8 hours.
-Your appetite disappears and you won't want to sleep. The effects of a small amount can last for 6-8 hours.
-Stays in the body for 2 - 4 days.