Anyone found Merbentyl(Dicylomine) tablets help? After two weeks of continious pain I've just been prescribed these. My Doctor, who is very understanding and sympathetic did comment that IBS is one of the most frustrating things to treat as there is no known cure. I've had it now 19yrs and it seems to be getting worse. My stomach is so distended I look like I'm pregnant! My colon just hurts all the time. I just hope these tablets take some of the pain away. I've tried other antispasmodics but none of them have helped.