thats where i was going to go with that "john calhoun", ephedra is a quick high "pick me up" like smoking a cigg, its half life is at the most 5 hours, you have nothing to worry about
niacine(sp) pills work well, when i was in law school i rememeber class mates that were pot heads drinking massive amounts of water and taking niacine pills to piss out the THC so that when they passed the Bar they could pass the law firms drug tests and start practicing