Dr. Eugene Aksenoff, who treated Michael Jackson on four separate occasions in Tokyo, warned the late "King of Pop" against taking stimulants because they could be life-threatening.

The 85-year-old medical director of the International Clinic in Minato Ward remembers the last time they met in March 2007, when Jackson asked for stimulants so that he could get through some demanding performances.

Aksenoff refused to prescribe them because they are addictive and potentially life-threatening, the Russian doctor told The Japan Times.