Excellent question, Leonard. In my drinking days, I never stopped to ask myself: Am I a healthy drinker or an unhealthy one? I was just a drinker. And drink was everywhere and plentiful. What caused me to finally quit (and quitting wasn't easy) was realizing that I'd lost all ambition. I'd find myself driving home nightly from the theater where I had a day job as an administrator, grabbing something passable for supper, plunking myself down on the sofa, and drink––just drink (usually Jim Beam & coke)––until I was so, so sleepy. Then I go to bed, normally around 8 or 8:30, night after night. I'd wake up the next morning, look around, and think, "This crazy!" and vow to quit. I did finally quit, but not until I'd been playing the same nightly game for 5-6 years. ––Ray (@ray666)

What I meant was a substantial drinker, but if you are asking what I said literally, it also means I was healthy other than the PN.
See the response to Ray for more info.