What makes you feel she's getting habitual?
Psychiatry medicines like blood pressure and
diabetes medicines need to be taken life long in a lot of patients. What you should do is let her take the medicines- they are a very 'good manner' of treating her problem and you're yourself saying that they are effective.
You can consult a therapist for CBT in addition to the medicines.
Health Tips
Psychiatric medicines should Never be stopped without the advise of the doctor, rebound symptoms are worse that the primary problem itself.