Recently my mum has started having some really strange episodes. While she is sitting down, she is unable to stand independently, she starts moving her legs in a walking motion, starts talking to people that are not there. Sometimes she thinks she is walking up a hill or riding a bike. She shouts and grabs things with her hands and becomes quite aggressive. She knows she is doing it but can not stop or control herself. It is a bit like someone having a seizure. She has been prescribed lorazepam half a tablet which does calm her down. I just wondered if is the psp progressing or maybe a side effect of the drugs she is taking which is Citalopram, co - beneldopa, Amantadine. Has anyone else experienced anything like this.