- Are you having trouble falling asleep?
- Are you more irritable and nervous than you used to be?
- Do you often have feelings of restlessness and anxiety?
- Do you feel like if you don’t get caffeine you almost can’t function?
- Do you need to drink more caffeine than you used to in order to feel energized?
- Do you go out of your way to get caffeinated drinks on a regular basis?
- Do you have frequent nausea or gastrointestinal problems like gastric reflux?
- Do you have headaches if you don’t get regular doses of caffeine?