Los Angeles ? Michael Jackson was so distraught over persistent insomnia in recent months that he pleaded for a powerful sedative despite warnings it could be harmful, says a nutritionist who was working with the singer as he prepared his comeback bid.

Cherilyn Lee, a registered nurse whose specialty includes nutritional counseling, said Tuesday that she repeatedly rejected his demands for the drug, Diprivan, which is given intravenously.

But a frantic phone call she received from Jackson four days before his death made her fear that he somehow obtained Diprivan or another drug to induce sleep, Lee said.

While in Florida on June 21, Lee was contacted by a member of Jackson’s staff.

“He called and was very frantic and said, ‘Michael needs to see you right away.’ I said, ‘What’s wrong?’ And I could hear Michael in the background …, ‘One side of my body is hot, it’s hot, and one side of my body is cold. It’s very cold,'” Lee said.

“I said, ‘Tell him he needs to go the hospital. I don’t know what’s going on, but he needs to go to the hospital … right away.’

“At that point, I knew that somebody had given him something that hit the central nervous system,” she said, adding, “He was in trouble Sunday and he was crying out.”

Jackson did not go to the hospital.