My doctor told me that there were alot of reasons a chemical imbalance was present...childbirth changes our hormonol structure, menopause, stress, diet, etc. I always thought that if a person was willing to seek help to enhance their life in a positive way, it was a sign of strength.
Not unlike GL's husband, I too am now anti depressant free, but do not frown on those who aren't...they're just being proactive for better mental health.