Maullin said that she was on the staff at Cedars-Sinai Medical Center when Smith was hospitalized for drug withdrawal during her pregnancy. She said Smith was taking "tremendous" doses of the anti-anxiety drug Xanax and was on "more Methadone than my long time addicts at the V.A."
The Playboy told her she had gone "cold turkey," discontinuing her medications all at once because she was concerned for the welfare of her expected baby.
By doing that, Maullin said, she had actually endangered the baby and herself. The doctor said she quickly resumed her medication with Methadone and began weaning her off Xanax, both of which had been prescribed by Dr. Sandeep Kapoor.
Maullin said the drugs were "hardcore medications" used for cancer and extreme pain.
"My thoughts were these were very hard core medications to be giving for the kind of pain she was demonstrating," said Maullin. "She was on medication that seemed like overkill for the type of pain she was in."
Maullin also said it was hard to get Smith's medical history, because she was "putting on a show" and deferred questions to her lawyer-boyfriend, Howard K. Stern, who was with her at all times.
Kapoor, Stern and Dr. Khristine Eroshevich have pleaded not guilty to conspiring to provide excessive opiates and sedatives to Smith. They are also charged with prescribing drugs to an addict, but are not charged with causing her 2007 overdose death.
The Associated Press contributed to this report.