My mum has tried one of this same family of drug and used to have accidents all the time, whenever she had a bowel movement it used to stink her whole house out and the farting noises she used to make echoed round her house like you wouldn't believe! We used to really have to use serious willpower to not go into uncontrollable giggling fits. She had to wear incontinence pads at all times because any small amount of fat consumed used to cause oily faeces to leak from her bottom :-/ To top all this embarrassment she never lost any weight on the drug.