My doctor prescribed Zelnorm to me last week. Ive got a bad case of GERD and am constipated often so thats why he gave it to me. The wierd thing is... the zelnorm is giving me really bad diarreah and I didn't even take the whole pill. But if thats not bad enough, the diarrhea is watery mixed with normal pieces of stool. What the heck?? >> looove to take some anti-diarrhea (with Loperamide HCI) but the internet says Zelnorm doesn't work with some over the counter drugs. What should I do??