What I've heard of has been SSRI-induced IBS (irritable bowel syndrome). I don't know much
more than that the body does
get used to the reuptake inhibitor, so when you take that away, the body doesn't know quite what to do... That's why it is so important to taper off slowly too I guess.
I'm with you, waiting out an explanation! If you should find that and a possible way to treat it without antidepressants, please keep us up to date!