Dr. Arnold Klein on "Good Morning America" on Wednesday
Photo: ABC

Almost two weeks after the passing of Michael Jackson, many of the questions about his life and death remain unanswered. Perhaps the most pressing mystery is the type and amount of prescription medications the pop singer was taking and who was prescribing them to him. The tabloids, meanwhile, have been pushing the question of whether Jackson is, in fact, the biological father of his three children.

Jackson's dermatologist of over 25 years appeared on Wednesday's (July 8) "Good Morning America" to discuss the singer's various treatments and to refute allegations that he prescribed him powerful painkillers.

"I was not one of the doctors who participated in giving him overdoses of drugs or too much of anything," Dr. Arnold Klein said during the interview. "In fact, I was the one who limited everything, who stopped everything."

During the same interview, Dr. Klein responded with a vague denial to an Us Weekly report contending that he is the father of the pop singer's eldest children, Prince Michael, 12, and Paris Michael Katherine, 11.

"To the best of my knowledge, I am not the father of these children," he said. "I can't answer it in any other way. I don't want to feed any of this insanity that is going around."

The mother of Jackson's children, Debbie Rowe, worked for Klein and first met the singer in the doctor's office. Jackson and Rowe married in 1996 and divorced less than three years later.

Jackson visited Klein in his office on the Monday before his death, and the dermatologist said he didn't notice anything to cause him concern. "He was not in terrible pain when I saw him," Klein said. "He danced in my office. He danced for my patients."

The doctor did say that he was always concerned that other doctors would prescribe him potentially harmful medications. "No matter what he wanted, someone would give it to him," Klein said.

The investigation into the cause of Jackson's death has focused on a powerful drug called Diprivan, also known as Propofol, which is widely used by hospital anesthesiologists during surgery. The sedative was reportedly found in the singer's home.

Dr. Klein, who said on "GMA" that he diagnosed Jackson with Lupus and treated him for acne scars, also revealed that in the past he had sedated the singer for painful procedures but never used powerful sedatives.

"How am I going to prescribe Diprivan when I don't know how to use it?" he said, declining to list the medications he did use to sedate Jackson.

During his final meeting with Jackson, Klein, who is a professor of medicine and dermatology at UCLA Medical School, said he noticed no signs of addiction or dangerous weight loss, but added that his expertise is in aesthetics, not addiction.

Many years ago, Klein said he found out that Jackson had obtained a potentially dangerous medication. He said he told the singer, "You can't take that. It's poison. Throw that in the trash.

"I got him to throw it in the toilet," Klein said.