Published: Apr 13, 2010 9:46 PM EDT

HOUSTON, Texas - The Texas Medical Board is restricting the doctor charged in Michael Jackson's death from administering the drug that authorities say was responsible for killing the pop star.

As part of an agreed order issued last week by the medical board, Dr. Conrad Murray can't use or administer in Texas propofol or any anesthetic agent that is normally administered by an anesthesiologist or any other heavy sedatives.

Murray, who was working as Jackson's personal physician, is charged with involuntary manslaughter in the singer's June 2009 death in California from the anesthetic propofol and other drugs. He has pleaded not guilty.

The California judge in Murray's case has also prohibited him from administering propofol.