Definitely, that is reactive depression and it may clear up if the situation improves. Clinical depression is different but often an incident starts it off or it is a condition that has been there to some degree even from childhood, not recognised, and worsens. I'm wary of drugs but I've known some people who have improved greatly on medication so we cannot generalise.
It's a horrible, isolating business and has a knock on effect on physical health if it goes on for long. Naturally if someone has faith it will be a comfort but often patients say they are spiritually dry.
I don't know about homeopathy Sririam, What would be put in the water for depression, to create a 'memory'? Seratonin? Maybe it has a placebo effect.