I've been taking it on and off for many years. I split the 10mg pills in half and only take it sun-thurs so it gets out of my system on the weekends. I have experienced amnesia, doing things that I don't remember on a couple of occasions. I don't take it until I get into bed but if it doesn't put me to sleep soon I'll get up and do things and then have memory problems. Otherwise, no other side effects.