I don't think Michael had trouble sleeping because of ephedrine and certainly not because he drank tons of coke. I think he was so desensitized to benzos they no longer worked despite using massive amounts.
He was probably using the ECA mostly for weight control. Yes he was underweight but his aesthetic ideals were far from normal.
Van do you have any idea what lab was/is producing a pill like that, with all three caffeine, aspirin, ephedrine in the optimal ratios for fat loss in it? Somebody should do it.
