Um, didn't you say you were taking like 50mg of ephedrine, and 600mg of caffeine per dose?LOL That's a shit load. At least to me. Your tolerance has to be through the roof. I usually respond better to ECA in the afternoon anyway. I forgot how that works in your body chemically, but I've read caffeine is much more effective once you have been awake several hours versus first thing in the morning. So, the only thing I might be able to suggest is to just have a little caffeine, and maybe only 10-12mg of ephedrine in the morning, then up it in the afternoon dose. Personally, I've found that my tolerance doesn't get too high if I do 100mg of caffeine, and 12.5mg of ephedrine in the morning, then in the afternoon I do another 200mg of caffeine, and another 12.5-25mg of ephedrine, and that's it for the day. That's my .02 cents.