Please help! I have been prescribed Erythromycin for motility/constipation after failing all other things. At the moment I am taking Zelnorm but it increases the pain way to much!I am concerned that taking antibiotics will cause an even bigger probem with the bacteria in the intestines. My doctor kind of just shrugged when I mentioned this(!). Is there any probiotic that could truly prevent this happening? I am supposed to take the liquid Erythromycin 3x per day. If there is a probiotic that would help and when would be a good time to take them?I'm so worried about this, I havent even picked up the prescription from the pharmacy yet. I currently dont have a problem with gas or bloating, my main problem is pain and constipation and am afraid that by taking erythromycin I may get those problems. I am not able to eat solid foods at all.I have taken other antibiotics for other things and have always found them to be very constipating. Is Erythromycin any different??Please help! I would really appreciat it.