i dont think ephedrine is a diuretic (i'm not sure) but if you're taking it with caffeine then caffeine definately is. if your water intake is the same off as on then you might notice a difference. i would say the "softness" is more likely a hunger rebound effect. if you stop taking e/c w/out tapering you'll be very hungry and if you're not monitoring calories closely you easily end up eating more throughout the day.