Hello all. My hub had a sudden decline in his dementia very muddled and disorientated. Has been on half minimum dose of risperidone for a couple of weeks twice a day. Has anyone any experience of this med. Also we arrived in cornwall from the north yesterday, usually happier here as it's where we moved from 3 years ago, but really all at sea. It was a long journey but did take 3 days staying one night near our son And another night further down. This is such a sudden decline he is not unwell in any way. Any ideas? He was so looking forward to seeing cornwall and our friends. It has been 13 months since our last trip. He can't remember people or places and short term memory has deteriorated all in a very short time. Any ideas Sorry bit disjointed and long winded!