Hello, my mother who has mixed dementia, quite advanced now has just been prescribed memantine. She was prescribed this drug years ago but refused to take it, this was when my dad was alive and taking care of her and he didn't push the issue, she further along the dementia path now. She also takes risperidone and I wondered how effective this mementine drug is, I'm not sure that it will assist much with her severe agitation and night time behaviour. Has anyone else had experience of this drug? Thank you.