Those zaps are SO annoying. For me, they never went away and actually got worse with time. I tried to get up to a high enough dose to really feel the effects, but the zaps made me totally ineffective for about 1hr after taking the stuff so I had to switch. Otherwise, I can report that it does indeed work, but appears to take longer than it "should". The chemistry suggests that it should work within 2 weeks, my experience is that it took a full 10 weeks at a therapeutic dose to feel something, other than the zaps.