This is great stuff for people who suffer from serious headaches, and can stave off a migraine if you take it when the migraine is starting.
I, too, have noticed the change with working out. I’ve seen references in TMag to taking ECA (Ephedrine, Caffeine, Aspirin) before a workout. If I’m not feeling particularly “up” to the workout, I slug down a helping of Power Drive and 2 Excedrin 30 minutes before. First time I did this was “by accident”: I took the Excedrin for a headache, and also Power Drive. Couldn’t believe not only how easy the weight was on a Saturday morning, but how “up” I felt. Now I do it regularly for heavy days.
I’s love to hear from those among us with more biochemstry expertise just what there is about these that crteates such a great synergistic effect.