My Mum has been on Risperidone for a month or so and I've noticed she seems frailer and much slower when walking around. She used to be able to walk a fair distance, but now it's more of an effort. It is supposed to calm her down so I can understand that it would have this effect. What I didn't expect is a rapid deterioration in her memory over a such a short time She thinks she is not living in her own home and sometimes thinks her husband is someone else. I know this is normal with Alzheimer's but the change has been marked since taking this drug. Can anyone comment?