Well I would say that I am the living proof that serious depression can be entirely a chemical imbalance, can develop with no external cause whatsoever, and can be completely
cured with antidepressants.
My depression came out of a clear blue sky. My life was completely perfect in every way - wife, children, good enough house, useful work, liveable income, plenty of exercise/outdoors time, spectacularly healthy diet, no past traumas etc.....but almost every minute of the day was spent thinking of ways to kill myself, I was completely unable to experience pleasure of any kind and my heart was filled with melancholy and intense sadness 24 hours a day. It got to the stage where I could do nothing but sit in a chair all day with my head slumped on my chest. Pretty bad!
I eventually went to the doctor, and was prescribed Fluoxetine. Within a few days (yes, I know doctors say that is not possible, but that's what happened) I experienced happiness for the first time in years. I stayed on the medication for ten years, as any attempt to reduce was impossible. After those ten years it suddenly felt like I was "cured", and I tapered off the tablets easily over a couple of months.
Nothing in my life had changed in the meantime. My past and my lifestyle were exactly as they had always been. It just seems that something had gone wrong in my brain, and I seemed to need that time of experiencing happiness as a sort of retraining to get me back on track. (When people say that antidepressants dull your emotions, I feel they haven't experienced the full-on nothingness of true depression before they started taking them...for me my time on antidepressants was when I
started to feel a range of emotions again.)
So yes, that's my story - hope it provides a counterbalance to some of the rather sweeping opinions/judgements here. Sometimes serious depression can appear with seemingly no cause from the outside world - in which case therapy would be entirely useless, because there are no particular 'issues' to resolve. Well, none that relate to the depression anyway!
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