caffeine
Caffeine is a stimulant drug affecting the central nervous system that reduces fatigue and drowsiness and increases alertness. It's found in beverages such as coffee, tea, soft drinks, and energy drinks, as well as some foods such as chocolate. Unlike most psychoactive drugs, it is generally considered safe and widely consumed, although ingesting too much caffeine can still be toxic.
Posts tagged with this tag usually depict a character under the effects of overdosing on caffeine, most often trembling and irritability, along with the caffeinated beverage that caused it. Rarely is the drug itself actually depicted.
External link
- Caffeine on Wikipedia