CAFFEINE

Coffee's kick

• Cause of a crash, perhaps

• Chocolate ingredient

• Cola ingredient

• Common alkaloid

• Eye-opener, literally

• It can keep you up

• Joe's stimulant

• Jolt in Jolt

• Mild stimulant

• Red Bull ingredient

• Stuff that people may get jittery with... or without

• Upper that's legal to down

• A bitter alkaloid found in coffee and tea that is responsible for their stimulating effects