What are the effects of caffeine?
Caffeine can make you feel more awake, keep you from falling asleep and help you concentrate. It can raise your blood pressure and heart rate. It is also a diuretic, which means it may make you pee more often.
Caffeine is safe for most people most of the time, but it can be harmful if someone has too much.
If you take too much caffeine, you may:
- Feel sick to your stomach or get diarrhea
- Get a headache
- Feel dizzy
- Feel shaky
- Feel anxious, nervous or irritable
- Have trouble sleeping
- Feel like your heart is beating too fast
In serious cases, you could have chest pain or have a heart attack, stroke or seizure.
Mixing energy drinks with alcohol, such as Red Bull and vodka, can be dangerous. Caffeine speeds up your brain and nerves, but alcohol slows them down. The caffeine can make you feel like the alcohol is not affecting you as much, which can lead you to drink more than you can handle. You may feel like you are okay to drive when you are really not.