Flex said that he did most drugs ever in 1996.
Here is the timeline:
He did the 1995 Olympia, and afterwards started prepping for the early shows in 96.
He did the Ironman and Arnold Classic in Febuary 1996
He did the Night OF Champions in May 1996 (there were 2 other small shows as well)
He did the Mr Olympia in September 1996
Then he went right back into training mode, preparing for the 1997 Arnold.