I really like the Zpak. I have taken it several times from things...

I had a friend with that experience from the z pac. The gas was actually a result of colitis. This can be very serious if left untreated. I would see a doctor if symptoms do not pass. Hopefully it is not and it is just symptoms of your healthy bacteria being killed off from the antibiotics. I would suggest to start taking probiotics to help regain your bodies natural flora balance in your intestines. Probiotics can be introduced to your body through yogurt or by taking acidolpholus capsules.