In my case the answer was a resounding yes. For many years, I thought I suffered from mild depression and never linked it to drinking. My psych kept saying that I had to give up the drink as that was what was causing my depression. I thought he had it the wrong way around
Now, that I have managed to abstain for a while, the depression has simply vanished. I do get down every now and then but then so do normal folks. It is nothing like when I was drinking when I frequently contemplated suicide, the depression was crushing and I would have meltdowns at regular intervals. All that has cleared for which I am soooo grateful.