what's the highest amount of ephedrine that you feel it's safe to take in one sitting? i usually take it 45 mins to an hour or so before workout when i'm really tired and need a boost...and i'm up to 3 Dymetadrine Extreme (2 no longer does the trick) which equates to 75mg ephedrine and i believe 300mg caffeine...how high mg count have you guys gone with ephedrine?