I'm not much of a phenergan fan..antipsychotics/dopamine antagonists aren't my thing, although Ive used promethazine to sleep in the past, I don't find it at all effective. Neither are benzos, Z-drugs, or nearly anything else. Only thing that doesn't get screwed with by my weird metabolism are alpha2 adrenoreceptor agonists like clonidine, or the one I get on rx to stop overloads happening, tizanidine..that stuff can KO me easily enough if I take it at night. I have benzo scripts but I don't use them much as they hardly affect me, even in huge doses. Chlormethiazole is a bit better, its barb-like in action, but still I seem highly resistant to either it, or its combination with my two benzo scripts.
I just have weird biochemical makeup.