I was feeling really tired at work today so I decided to try these energy pills instead of my usual Monster drink. Let me tell you that was one seriously poor decision! I took this shit at 9:30pm and it kicked in hard and fast by !0:00pm. I had eaten before so I was not on an empty stomach but this garbage turned on me so fast. I got the shakes, cold sweats, a very strange and unpleasant virtigo and I puked up the nastiest vomit imaginable. I had to leave work earl because I got sooo sick. I lay here in my bed 5 hours later still feeling like incredible shit and my stomach is in knots and still a bit nausious. Please heed my warning and steer clear of this shit. I read some things on line about them and it seems most people do get violently ill from even the reccomended dose. I dont know how these assholes at stacker can sleep at night knowing what they are putting people through. I wish they had to deal with this sickness non stop. The worst part is there is still no way I can just sleep it off because Im still so tweaked up on it. Watch out for this crap.