Pro-biotics have not been proven to be effective. I have Crohns Disease and it is one of the most difficult and longest to finaly dianogose diseases. I would demand a Colonoscopy and a endoscopy to find the real reason but it sounds so familiar and yes, i have been given the medicine you mentioned as I have both IBS and Crohns! It does work for the IBS so I would go to Doctor and demand you be checked. It is so debiliatating I have been on disability since 2004 as you stated, how can you every other week or so, wok an 8 hour job when every 5 minutes you are running to bathroom. In the meantime, my Gastroenterologist has allowed me to take 4 immodium in the morning and 4 at night and no proof anymore would do any good, since that is higher dose than recommended on box , you might want to ask!
Good Luck and let me know if I was accurate!
Have you tried Caltrate D? A number of people say that helps with diahrea. I don't know exactly about the probiotics helping with the diahrea but it sure helps balance the stomach. There are many people on this site that have found them a big help including myself.
I usually have IBS - C but the other day I had exactly what you described and knew I could not drive home that fast. I made an illegal turn and ran into Wendy's. Of course someone was in there but I did manage to hold it. I was thinking about all you that have this on a regular basis and was really feeling for you. I had it the day before but was home. I realize now it was the sugar free jello that I had had for 2 nights. Bad stuff, that sugar free for most people with IBS.
My symptoms were very similar, especially the urgency, and I finally went to a GI. He supsects that it was ibs due to a bacterial imbalance, so he had me start heavy probiotics (I take one called Floragen3) plus Fibercon fiber supplements for bulking. He suspects that my problems all started as a result of a standard course of amoxicillan for strep last year, so he also suggested a round of flagyl, which is a really strong antibiotic. The thinking is that it will kill off everything, good and bad bacteria, and then you basically start from scratch with the probiotics to rebuild the balance. However, I declined the flagyl and opted for just the probiotics and fiber. I have definitely seen an improvement.
Had you been on antibiotics for anything prior to your symptoms returning?
Good luck, I hope you find some answers soon.