> If I have a good day it's impossible to day whether that's due to Prozac. But since starting Prozac I have been much more likely to have good days than bad. So, since Prozac is cheap and I don't seem to suffer any side effects, I plan to keep taking it in perpetuity.

I was acknowledging that the "good days" could be due to Prozac or could be a placebo effect, but since being on Prozac correlates with having significantly more good days, and I experience virtually no ill effects, I choose to continue with it.