Yes my exact thoughtsI can't believe a vet was okay with you giving her that drug and especially the "indefinitely" part. I don't think she looks depressed, I think she looks scared which is perfectly normal for an outdoor semi-feral cat who now has to live indoors. I took in a feral cat in June of 19 and it has taken her this long just to comfortable to be on the same couch with me, and even then she keeps her distance. It takes a long time.
I applaud you for taking her in and keeping her safe, I am just not sure about that drug being used constantly. It is a crutch.
I wouldn't take ativan myself
Much less give it to a cat
It can be very addictive
Somethings are in my opinion isnt ok to give a cat
Far as prescriptions like these
Vets aren't always right
Sometimes you have to use your own judgment
Plus get second opinion or 3rd