yeah at 3 times a day you gotta be speeding pretty good
i know i would not be able to sleep

i usually take my eca 1st thing in the morning then like right after lunch and i can generaly get to bed at 10-11pm

i dont see why you cant just take it 2xs a day

even 25mg ephderine
100mg of caffine in the evening should still keep you up

its not just the caffine keeping you awake you could try

1/2 the ephderine and 50mg of caffine

im 6' 2" 212lbs 1/2 an ephderine alone taken at or after 6pm will keep me up till at least 3am

hope this helps