Altering Consciousness with DrugsConsciousness

How Caffeine Works

In this clip from How Stuff Works, we get a short tutorial about how caffeine works to keep us from feeling sleepy.

Caffeine inhibits the absorption of adenosine, leading to increased arousal. It starts to affect the body with doses as small as 50 milligrams, or about half a cup of coffee. What category of drugs does caffeine fall into? What are the various side effects of caffeine?

Show More

Related Articles

Check Also