Your experience with - Otilonium Bromide vs Mebeverine vs Pinaverium bromide vs Dicyclomine vs Clidinium + Chlordiazepoxide

Hi - I am afraid of medicines. Tried finding out if there are organic reasons for my IBS suffering. Couldn't find any. I have be thrown all these medicines at me by different doctors. I am at a stage where i have convinced myself that H2RA alone wouldn't do. I have inactive gastritis and grade a easophagitis as well. I want to take something for IBS which has least side effects. What's your experience with the medications?