I have just started taking this antispasmodic (bentyl) today. I took the first dose about 9 hours ago and just took my second dose. I just spent the last 20 minutes on the can with a very painful bowel movement. This was not like a normal bowel movement for me.Actually i have had 3 bowel movements in the last 2 hours each worse than the last. I am wondering is there like a cleaning out period with Bentyl and once you start taking it regularly will it not cause your colon to go berzerk. Does it cause the part of the bowel to react violently until the first dose has passed or can it actually make the IBS worse. I would appreciate it someone could post what it was like when they first took Bentyl and if it is normal to have an angry stomach until your body adjusts to it. Thanks.......Lorne[This message has been edited by lorne (edited 03-24-2000).]