Ive only personally tried hydroxyzine, but 100mg hydroxyzine pamoate makes me more tired than any benzo, z-drug, or barbiturate I have tried. I use none of these regularly so it isn't tolerance and even the hydroxyzine can be hit or miss. But given the choice between it and a more traditional sedative/hypnotic, I would take hydroxyzine every time. Mirtazapine probably is just as good as they both show similar potencies at antagonizing 5ht-2a and H1 receptors but have no experience with it.