My dad has Vascular Dementia.He was prescribed Mirtazapine at night time.It helps with depression.He is on 30mg with a view to maybe going up a little more.It also seems to help him with his agitation during the day. I’m sorry it didn’t help your mum.No other suggestions that I can think of tbh.Mum has Vascular Demrntia and Memantine can only be prescribed for Alzheimers or Alzheimers with mixed dementia. I wouldnt be wanting to put Mum on antiphyschotic drugs. We are not under the memory clinic as she was never formerly diagnosed via that route. A psychiatrist from the Court of Protection came to my home and just said Mum had no capacity due to Vascular Dementia. We were going through a very contentious case with CoP and the judge sent him as there was no formal diagnosis so the Memory Clinic will not deal with Mum sadly.