Ah, the wonder of activated charcoal.

eMedicine Health - Activated Charcoal, Description

If you have never had the opportunity to witness activated charcoal in action, you don't know what you are missing. I'm just rounding in from a on-call trip to the ER for a drug overdose. This stuff may be better than combo doses of Haldol and Ativan. It took a rather large, combative patient from requiring the presence of police officers to a projectile-vommiting shell of a person within minutes. This emedicine article explains how activated charcoal does its work.