Hello, my husband has Parkinsons and FrontoTemporal Dementia so I understand that the hallucinations are concerning. What I do is allow him to talk about what he is seeing or hearing. Sometimes it doesn’t seem necessary to correct him. If it’s not bothering him I just let him tell me what he is seeing or hearing. Sometimes I tell him it’s not there or what he is hearing isn’t there. It all depends on what I think is needed at the time. I don’t know if your husband’s hallucinations frighten him. Hopefully they do not. My husband sees things that are not scary to him. If your husband is afraid I think listening to him then explaining that it’s not real would be a comfort to him. Sometimes my husband gets agitated if I don’t see what he does so I have to tell him that its not real. The thing to keep in mind is that it’s important not to embarrass him or take away his dignity. Listening, loving and understanding are the best things you can do for him.