I am sorry to note that you are having a difficult time with your father's skin condition.
Trazalon is trazadone
which is a sedative
Not sure what Donamen is?
Quitipin is quetiapine
that is an antipsychotic
In short, he needs a sedative antihistamine that will help with the itching, such as atarax or hydroxyzine
50 or 75mg.
The others will not work as effectively apart from doxepin
that will also be a good choice.