Celebrity mags have suggested that actress Demi Moore's hospitalization was for substance abuse earlier this week, and that she inhaled nitrous oxide prior to her recent collapse and 911 call.

Moore was rushed to a Los Angeles hospital Monday night after having serious seizure-like symptoms, and it now seems substance abuse is suspected to have played a part. Her daughter is also believed to have been at the scene when Moore collapsed.

(Photo: REUTERS/Jason Redmond)Cast member Demi Moore (R) and her husband, actor Ashton Kutcher, arrive at the premiere of "The Joneses" in Los Angeles, California April 8, 2010.

Paramedics were called at 10:45 p.m. Monday night according to TMZ, after the actress had inhaled dangerous amounts of nitrous oxide.

Nitrous Oxide, which is commonly referred to as "laughing gas," is often administered at the dentist office for surgical procedures. The drug is used most commonly used among teenagers seeking a quick and cheap thrill, by inhaling the nitrous oxide from the bottom of a whip cream can.

The Urban Dictionary states that the process, called "whip it," requires a balloon and cracker to extract the nitrous oxide.

Demi's representative has said, "Because of the stresses in her life right now, Demi has chosen to seek professional assistance to treat her exhaustion and improve her overall health. She looks forward to getting well and is grateful for the support of her family and friends," according to TMZ.