Well well. I go weeks without sleep. Drowsiness is so rare. I got to a point I couldn't tell if Trazadone affected me anymore. I still took it.
But. At this point the only sleep prescription I'm on is orphenadrine/Norflex. Boosts GABA levels. Kills pain. Relaxes them muscles. 8 hours of calm.
Not sure I've got a magic bullet yet, sleep is elusive, but tryptophan + vitamins seems to be quite worthwhile. Little melatonin on the side. Nutrients - e.g. vitamins, minerals - are KEY when attempting to boost neurotransmitters.