Did google, but it seems to be a rare side effect indeed, I should clarify, I got the incontinence after the dose was increased. The doc lowered me down after I told her. I have had no problems since that episode, maybe it sedated me too much. Now that is a bit scary, to sleep through the urge to urinate or to be so relaxed I lose control. That old worn out saying that the house could have burned down around me. I did not like the stoned feeling I got that has since passed, and I do notice a significant reduction in fasiculations and that is reason enough to keep taking the med! I do not care for the sleepiness and shakes, but hopefully that will pass soon.