I've been having some insomnia in hotels lately which I want to get rid of ASAP or at least reduce so that it won't affect my job performance, sometimes bad enough that I only catch four hours of sleep. No idea why, aside that it happens when I'm wound up from a very long day of flying. Relaxation techniques are only helping marginally, so onto the next best thing. Are they safe to take, though, as in they won't make me too groggy the next morning? Could they cause me to fail a DOT drug test? It isn't so much the melatonin that I fear but whatever else could be secretly included in them. Never tried them before, so pardon all the layman questions. Thanks for any input that you all could give.