Demi was doing WHAT??

So, I am NOT up on the drug scene (THANK GOD!!) But even I would know that doing "whip-its" IS NOT A GOOD IDEA! If TMZ.com is to be believed, this drug is why Demi Moore is now hospitalized for "exhaustion. Check out their story...

Demi Moore's friend called paramedics Monday night after the actress inhaled a dangerous amount of nitrous oxide ... TMZ has learned.
 
Sources tell TMZ ... one of Demi's friends who was at her home told emergency workers Demi was doing whip-its. A whip-it is a street name for a type of nitrous oxide inhalant.

The friend said she became upset when Demi had a reaction to a whip-it and lapsed into semi-consciousness.

It appears Demi had symptoms of a seizure -- after inhaling the nitrous.

A whip-it is not a common drug among people of Demi's age and social status. It's typically used by younger people who are looking for a cheap thrill.

Eonline is now reporting that Demi has left the hospital...