Hello
My mum who had dementia, needed Anti d's over the course of many months possibly a year, we tried mum on many different ones all were ssri and all prescribed by her gp
Sertraline was the first one, quite simply it didnt work
she was tried on many others, sadly with differing effects on her
eventually the gp, who was extremely puzzled as to why none of them had helped and some had caused nightmares, hallucinations etc as they were all ssri's so worked in the same way, decided to try mum on Prozac which thankfully worked well for my Mum
When I discussed all the anti d's that mum had tried that either didnt work or had unpleasant effects, to Mum's Consultant he
explained that when a person had a disorder of the brain such as Dementia and medications were given that worked on the brain, it was sometimes trial and error as to the effects they would have, what helped one person didnt help another
My Dad has recently been put on Mirtazipine as the gp thought his insomnia could be caused by depression, only a low dose
was very tired the first day then for the next couple of days was just a bit tired, and yes they did helped his insomnia
I hope this helps