Dan Winterland, my compliments for the best humor I've seen on this forum (re cat-napping).
Re addiction, the one I mentioned up-thread almost certainly has no such issue, fwiw. The biggest danger will be counting on them and further depriving yourself of sleep to get the car fixed or play that round of golf. Ideally you'd have one on hand for a time of need. Same wish for my young-20's son - have one in the glovebox, "break glass in case of emergency". His flying adventures are just beginning, and no doubt he frightens himself and his instructor enough such that nodding off isn't an issue.
(Lest anyone worry that I'm plumping for the company that makes the stuff, rest assured. I abhor their anti-competitive business practices and do suggest that you seek out generics (after accepting their free samples, of course.)