Gregory Thompson earlier said the drugs prescribed for Smith would be effective "if you were going to kill someone."
The judge's caution also applied to a pharmacist who once described the drugs ordered by defendant /*Dr. Khristine Eroshevich*/ as "pharmaceutical suicide."
On Tuesday, Thompson was questioned about a conversation he allegedly had with Eroshevich.
Thompson said he expressed shock after learning the list of drugs the doctor was administering to Smith and urged her to take Smith to a rehab center in the Caribbean.
Eroshevich, along with /*Dr. Sandeep Kapoor*/ and /*Howard K. Stern*/, Smith's longtime boyfriend, are charged with providing excessive amounts of prescription drugs to Smith.
They are not charged in her 2007 death from an overdose.
The Associated Press contributed to this report.
