well, i just got my order of two bottles of the discounted synergy ec from 1fast400 and decided to start 'em out. took one this morning around 10am, didn't feel much but i was also dead tired so the caffeine helped wake me up a bit. took another at about 4pm with a 200mg caffeine tab, went for some tempo runs outside at the local track. it's not that sunny or hot outside, but i'm sweating like crazy, no jitters, no twitch, my heart felt it was beating a bit harder than it should have been. interesting thing to note is that my stomach burns, if you've put on capzaicin hp it's identical to that hot burning sensation (i havn't used cap hp for 2 weeks) and i'm still sweating profusely despite not having that hard of a tempo run. feeling good, no problems or jitters or heart palpitations. i felt a bit jittery when i was on 25mg ephedrine and this is a lower dose but i dont remember sweating or my core temp feeling this high on hcl. let ya know how it works out more long term.