Kelly Sott, 31, was taken into police custody after she was caught handing over an electric toothbrush to Michael Douglas' 30-year-old son in his mother Diandra Douglas' New York apartment, where he is being held on house arrest on drug charges.
The handle of the toothbrush was said to have been filled with heroin.
According to legal papers, court-appointed security guards assigned to watch Douglas overheard him in a telephone conversation asking a pal to bring over several personal items, including an electric toothbrush.
Officials became suspicious when Douglas "appeared to be very concerned about when the toothbrush would be delivered". Alarms were raised after one guard recalled Douglas receiving a toothbrush just days before.
When Sott arrived at the Manhattan home with the bag of items, guards searched the toothbrush and found 19 tiny bags "containing a brownish substance that appeared to be heroin".
Sott, who claims she was unaware of the drugs, was then taken back to the room she had shared with Douglas at Manhattan's Hotel Gansevoort, where police discovered heroin, crystal meth and marijuana.
She appeared in a federal court on Tuesday (11Aug09) to face the drug smuggling allegations and Magistrate Frank Maas ordered her to remain behind bars without bail. He also ordered immediate treatment for a "health condition", after her lawyer Jason Yang revealed she was a heroin user who suffered from hypertension.
Douglas was busted in a drugs raid at the Hotel Gansevoort on 3 August (09), and taken into custody on suspicion of possessing methamphetamines with intent to distribute.
Reports suggest the It Runs In The Family star had been plotting to move approximately $18,000 (£12,000) of crystal meth from California to New York and sell it when an undercover informant alerted the U.S. Drug Enforcement Administration of Douglas' involvement.