in treatment of MAJOR DEPRESSION
acute phase- mostly upto 2-3 months
continuation phase- 4-6 months
maintenance phase- if history of more than 1 episode in past...
YOU HAVE NOT MENTION ABOUT
her symptoms profile like, which type of symptoms she have, duration of symptoms, other disturbance etc...
it is better to visit psychiatrist
personally, who decide about diagnosis and duration of treatment. ( it is possible that many times person is not having major depression)
and prodep not affect cholesterol
level significantly, so can give it without any dose adjustment.....