Ok, I took this because I needed to feel better fast for a weekend with all my guy friends. I am a single girl and I was actually HOPING to come out of this weekend with a boyfriend outta one of 'em...so I wanted to be over my yucky cold/flu symptoms so I could have a good time! Ok...I was NOT feeling well after the third day, my stomach was killlllling me, and I wasn't over my cold stuff either. So by the weekend I was finally feeling a little better but I had started having diarrhea and (even worse!) TERRIBLE GAS. I should have just stayed home, but I went on this roadtrip anyway. I was thinking I would be able to hold it until we stopped, but I started having terrible gas buildup and I just had to release it or I thought I would get sick. Ok, let me just say that we had to pull the jeep over so one of my friends, the really cute one that I liked, could throw up. It was terrible....and even worse they all knew it was me. In my opinion, the slight relief I got from my cold was not worth the tradeoff in side effect. So thanks to my Z pak experience, I was called "Hell Raiser" and other nicknames the rest of the weekend. I will not be using this product again.