I am enjoying my LUVOX CR, quite seriously. There is a difference, however, between the IR and the CR version. Currently there is no IR 'Luvox' per se, but in terms of efficacy, both seem to be equal. There are benefits with the CR, and of these there are many, but it seems to, for some reason, cause the stool to be softer. It does not cause me to have diarrhea, but I am prone to having the opposite normally, so I am wondering, are other people on CR getting full blown GI upset with diarrhea? The IR for some reason does not seem to have this effect,